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    <link:label id="lab_country_US_47BF085E5B9E43B20AB17382D12A18FA_label_en-US" xlink:label="lab_country_US_47BF085E5B9E43B20AB17382D12A18FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">UNITED STATES</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="loc_country_US_47BF085E5B9E43B20AB17382D12A18FA" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfTransferAxis" xlink:label="loc_ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfTransferAxis_31D7A2EF7028319AA6887382D12AFBAC" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_TypesOfTransferMember_43820120AF43A0A25D407382D12A8DEE_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfTransferMember_43820120AF43A0A25D407382D12A8DEE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Types of transfer [member]</link:label>
    <link:label id="lab_ifrs-full_TypesOfTransferMember_43820120AF43A0A25D407382D12A8DEE_label_en-US" xlink:label="lab_ifrs-full_TypesOfTransferMember_43820120AF43A0A25D407382D12A8DEE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Types of transfer [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfTransferMember" xlink:label="loc_ifrs-full_TypesOfTransferMember_43820120AF43A0A25D407382D12A8DEE" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_FactoringOfReceivablesMember_D551A60E4F5E0D3109FC7382D12AC5F2_terseLabel_en-US" xlink:label="lab_ifrs-full_FactoringOfReceivablesMember_D551A60E4F5E0D3109FC7382D12AC5F2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Factoring of receivables</link:label>
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    <link:label id="lab_ifrs-full_CategoriesOfRelatedPartiesAxis_AA7632A51561B0555DCD7382D12B2526_terseLabel_en-US" xlink:label="lab_ifrs-full_CategoriesOfRelatedPartiesAxis_AA7632A51561B0555DCD7382D12B2526" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Categories of related parties [axis]</link:label>
    <link:label id="lab_ifrs-full_CategoriesOfRelatedPartiesAxis_AA7632A51561B0555DCD7382D12B2526_label_en-US" xlink:label="lab_ifrs-full_CategoriesOfRelatedPartiesAxis_AA7632A51561B0555DCD7382D12B2526" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Categories of related parties [axis]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_AA7632A51561B0555DCD7382D12B2526" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_EntitysTotalForRelatedPartiesMember_49608835AEA206A849DB7382D12B87E8_terseLabel_en-US" xlink:label="lab_ifrs-full_EntitysTotalForRelatedPartiesMember_49608835AEA206A849DB7382D12B87E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity's total for related parties [member]</link:label>
    <link:label id="lab_ifrs-full_EntitysTotalForRelatedPartiesMember_49608835AEA206A849DB7382D12B87E8_label_en-US" xlink:label="lab_ifrs-full_EntitysTotalForRelatedPartiesMember_49608835AEA206A849DB7382D12B87E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity's total for related parties [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_49608835AEA206A849DB7382D12B87E8" xlink:type="locator" />
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    <link:label id="lab_cstm_ConstelliumAutomotiveMember_24B63263B2AF722F68FC7382D12BFC2A_terseLabel_en-US" xlink:label="lab_cstm_ConstelliumAutomotiveMember_24B63263B2AF722F68FC7382D12BFC2A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Constellium automotive</link:label>
    <link:label id="lab_cstm_ConstelliumAutomotiveMember_24B63263B2AF722F68FC7382D12BFC2A_label_en-US" xlink:label="lab_cstm_ConstelliumAutomotiveMember_24B63263B2AF722F68FC7382D12BFC2A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Constellium Automotive [member]</link:label>
    <link:label id="lab_cstm_ConstelliumAutomotiveMember_24B63263B2AF722F68FC7382D12BFC2A_documentation_en-US" xlink:label="lab_cstm_ConstelliumAutomotiveMember_24B63263B2AF722F68FC7382D12BFC2A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Constellium Automotive.</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_ConstelliumAutomotiveMember" xlink:label="loc_cstm_ConstelliumAutomotiveMember_24B63263B2AF722F68FC7382D12BFC2A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_ConstelliumAutomotiveMember_24B63263B2AF722F68FC7382D12BFC2A" xlink:to="lab_cstm_ConstelliumAutomotiveMember_24B63263B2AF722F68FC7382D12BFC2A" xlink:type="arc" />
    <link:label id="lab_ifrs-full_BorrowingsByNameAxis_75342E96FD453164FED67382D12BC583_terseLabel_en-US" xlink:label="lab_ifrs-full_BorrowingsByNameAxis_75342E96FD453164FED67382D12BC583" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Borrowings by name [axis]</link:label>
    <link:label id="lab_ifrs-full_BorrowingsByNameAxis_75342E96FD453164FED67382D12BC583_label_en-US" xlink:label="lab_ifrs-full_BorrowingsByNameAxis_75342E96FD453164FED67382D12BC583" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Borrowings by name [axis]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_75342E96FD453164FED67382D12BC583" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_BorrowingsByNameMember_9D0249C49F47ACADBC657382D12BC7BD_terseLabel_en-US" xlink:label="lab_ifrs-full_BorrowingsByNameMember_9D0249C49F47ACADBC657382D12BC7BD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Borrowings by name [member]</link:label>
    <link:label id="lab_ifrs-full_BorrowingsByNameMember_9D0249C49F47ACADBC657382D12BC7BD_label_en-US" xlink:label="lab_ifrs-full_BorrowingsByNameMember_9D0249C49F47ACADBC657382D12BC7BD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Borrowings by name [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="loc_ifrs-full_BorrowingsByNameMember_9D0249C49F47ACADBC657382D12BC7BD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_BorrowingsByNameMember_9D0249C49F47ACADBC657382D12BC7BD" xlink:to="lab_ifrs-full_BorrowingsByNameMember_9D0249C49F47ACADBC657382D12BC7BD" xlink:type="arc" />
    <link:label id="lab_cstm_MuscleShoalsFactoringFacilityMember_A5BEA9DEB31C5A5BE9597382D12C5AC9_terseLabel_en-US" xlink:label="lab_cstm_MuscleShoalsFactoringFacilityMember_A5BEA9DEB31C5A5BE9597382D12C5AC9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Muscle Shoals factoring facility</link:label>
    <link:label id="lab_cstm_MuscleShoalsFactoringFacilityMember_A5BEA9DEB31C5A5BE9597382D12C5AC9_label_en-US" xlink:label="lab_cstm_MuscleShoalsFactoringFacilityMember_A5BEA9DEB31C5A5BE9597382D12C5AC9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Muscle Shoals Factoring Facility [member]</link:label>
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    <link:loc xlink:href="cstm-20200630.xsd#cstm_MuscleShoalsFactoringFacilityMember" xlink:label="loc_cstm_MuscleShoalsFactoringFacilityMember_A5BEA9DEB31C5A5BE9597382D12C5AC9" xlink:type="locator" />
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    <link:label id="lab_cstm_DisclosureOfTradeAndOtherReceivablesLineItems_CB51F3F72D0ECD6EE7D07382D12C400B_terseLabel_en-US" xlink:label="lab_cstm_DisclosureOfTradeAndOtherReceivablesLineItems_CB51F3F72D0ECD6EE7D07382D12C400B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disclosure of trade and other receivables [line items]</link:label>
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    <link:label id="lab_cstm_SecuredInventoryBasedFacilityDueTwoThousandNineteenMember_E6F661A859B3F7178812771382C9B6EE_documentation_en-US" xlink:label="lab_cstm_SecuredInventoryBasedFacilityDueTwoThousandNineteenMember_E6F661A859B3F7178812771382C9B6EE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Secured inventory based facility due two thousand nineteen.</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_SecuredInventoryBasedFacilityDueTwoThousandNineteenMember" xlink:label="loc_cstm_SecuredInventoryBasedFacilityDueTwoThousandNineteenMember_E6F661A859B3F7178812771382C9B6EE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_SecuredInventoryBasedFacilityDueTwoThousandNineteenMember_E6F661A859B3F7178812771382C9B6EE" xlink:to="lab_cstm_SecuredInventoryBasedFacilityDueTwoThousandNineteenMember_E6F661A859B3F7178812771382C9B6EE" xlink:type="arc" />
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyFourMember_87AB8431E722B80F839E771382CAE54C_terseLabel_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyFourMember_87AB8431E722B80F839E771382CAE54C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Constellium SE (Issued May 2014, due 2024)</link:label>
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyFourMember_87AB8431E722B80F839E771382CAE54C_label_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyFourMember_87AB8431E722B80F839E771382CAE54C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Constellium SE Senior Unsecured Notes Issued May Two Thousand Fourteen Due Two Thousand Twenty Four [Member]</link:label>
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyFourMember_87AB8431E722B80F839E771382CAE54C_documentation_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyFourMember_87AB8431E722B80F839E771382CAE54C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Constellium SE Senior Unsecured Notes Issued May Two Thousand Fourteen Due Two Thousand Twenty Four</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyFourMember" xlink:label="loc_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyFourMember_87AB8431E722B80F839E771382CAE54C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyFourMember_87AB8431E722B80F839E771382CAE54C" xlink:to="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyFourMember_87AB8431E722B80F839E771382CAE54C" xlink:type="arc" />
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyOneMember_0BAA362CFA3017628928771382CA51D1_terseLabel_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyOneMember_0BAA362CFA3017628928771382CA51D1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Constellium SE (Issued May 2014, due 2021)</link:label>
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyOneMember_0BAA362CFA3017628928771382CA51D1_label_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyOneMember_0BAA362CFA3017628928771382CA51D1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Constellium SE Senior Unsecured Notes Issued May Two Thousand Fourteen Due Two Thousand Twenty One [Member]</link:label>
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyOneMember_0BAA362CFA3017628928771382CA51D1_documentation_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyOneMember_0BAA362CFA3017628928771382CA51D1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Constellium SE Senior Unsecured Notes Issued May Two Thousand Fourteen Due Two Thousand Twenty One</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyOneMember" xlink:label="loc_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyOneMember_0BAA362CFA3017628928771382CA51D1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyOneMember_0BAA362CFA3017628928771382CA51D1" xlink:to="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedMayTwoThousandFourteenDueTwoThousandTwentyOneMember_0BAA362CFA3017628928771382CA51D1" xlink:type="arc" />
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedFebruaryTwoThousandSeventeenDueTwoThousandTwentyFiveMember_CA3685E9C01CC9FF114A771382CA6830_terseLabel_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedFebruaryTwoThousandSeventeenDueTwoThousandTwentyFiveMember_CA3685E9C01CC9FF114A771382CA6830" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Constellium SE (Issued February 2017, due 2025)</link:label>
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedFebruaryTwoThousandSeventeenDueTwoThousandTwentyFiveMember_CA3685E9C01CC9FF114A771382CA6830_label_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedFebruaryTwoThousandSeventeenDueTwoThousandTwentyFiveMember_CA3685E9C01CC9FF114A771382CA6830" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Constellium SE Senior Unsecured Notes Issued February Two Thousand Seventeen Due Two Thousand Twenty Five [Member]</link:label>
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedFebruaryTwoThousandSeventeenDueTwoThousandTwentyFiveMember_CA3685E9C01CC9FF114A771382CA6830_documentation_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedFebruaryTwoThousandSeventeenDueTwoThousandTwentyFiveMember_CA3685E9C01CC9FF114A771382CA6830" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Constellium SE Senior Unsecured Notes Issued February Two Thousand Seventeen Due Two Thousand Twenty Five</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_ConstelliumSESeniorUnsecuredNotesIssuedFebruaryTwoThousandSeventeenDueTwoThousandTwentyFiveMember" xlink:label="loc_cstm_ConstelliumSESeniorUnsecuredNotesIssuedFebruaryTwoThousandSeventeenDueTwoThousandTwentyFiveMember_CA3685E9C01CC9FF114A771382CA6830" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_ConstelliumSESeniorUnsecuredNotesIssuedFebruaryTwoThousandSeventeenDueTwoThousandTwentyFiveMember_CA3685E9C01CC9FF114A771382CA6830" xlink:to="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedFebruaryTwoThousandSeventeenDueTwoThousandTwentyFiveMember_CA3685E9C01CC9FF114A771382CA6830" xlink:type="arc" />
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixMember_77BFA6D4BC19AFA1331E771382CAB6C0_terseLabel_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixMember_77BFA6D4BC19AFA1331E771382CAB6C0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Constellium SE (Issued November 2017, due 2026)</link:label>
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixMember_77BFA6D4BC19AFA1331E771382CAB6C0_label_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixMember_77BFA6D4BC19AFA1331E771382CAB6C0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Constellium SE Senior Unsecured Notes Issued November Two Thousand Seventeen Due Two Thousand Twenty Six [Member]</link:label>
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixMember_77BFA6D4BC19AFA1331E771382CAB6C0_documentation_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixMember_77BFA6D4BC19AFA1331E771382CAB6C0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Constellium SE Senior Unsecured Notes Issued November Two Thousand Seventeen Due Two Thousand Twenty Six</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixMember" xlink:label="loc_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixMember_77BFA6D4BC19AFA1331E771382CAB6C0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixMember_77BFA6D4BC19AFA1331E771382CAB6C0" xlink:to="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixMember_77BFA6D4BC19AFA1331E771382CAB6C0" xlink:type="arc" />
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixOneMember_83806FD5601927F2B15B771382CA4A9F_terseLabel_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixOneMember_83806FD5601927F2B15B771382CA4A9F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Constellium SE (Issued November 2017, due 2026)</link:label>
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixOneMember_83806FD5601927F2B15B771382CA4A9F_label_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixOneMember_83806FD5601927F2B15B771382CA4A9F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Constellium SE Senior Unsecured Notes Issued November Two Thousand Seventeen Due Two Thousand Twenty Six One [Member]</link:label>
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixOneMember_83806FD5601927F2B15B771382CA4A9F_documentation_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixOneMember_83806FD5601927F2B15B771382CA4A9F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Constellium SE Senior Unsecured Notes Issued November Two Thousand Seventeen Due Two Thousand Twenty Six One</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixOneMember" xlink:label="loc_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixOneMember_83806FD5601927F2B15B771382CA4A9F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixOneMember_83806FD5601927F2B15B771382CA4A9F" xlink:to="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedNovemberTwoThousandSeventeenDueTwoThousandTwentySixOneMember_83806FD5601927F2B15B771382CA4A9F" xlink:type="arc" />
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedJuneTwoThousandTwentyDueTwoThousandTwentyEightMember_B4FE70D8C8B4227B3C29771382CAD5CE_terseLabel_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedJuneTwoThousandTwentyDueTwoThousandTwentyEightMember_B4FE70D8C8B4227B3C29771382CAD5CE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Constellium SE (Issued June 2020, due 2028)</link:label>
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedJuneTwoThousandTwentyDueTwoThousandTwentyEightMember_B4FE70D8C8B4227B3C29771382CAD5CE_label_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedJuneTwoThousandTwentyDueTwoThousandTwentyEightMember_B4FE70D8C8B4227B3C29771382CAD5CE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Constellium SE Senior Unsecured Notes Issued June Two Thousand Twenty Due Two Thousand Twenty Eight [Member]</link:label>
    <link:label id="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedJuneTwoThousandTwentyDueTwoThousandTwentyEightMember_B4FE70D8C8B4227B3C29771382CAD5CE_documentation_en-US" xlink:label="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedJuneTwoThousandTwentyDueTwoThousandTwentyEightMember_B4FE70D8C8B4227B3C29771382CAD5CE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Constellium SE Senior Unsecured Notes Issued June Two Thousand Twenty Due Two Thousand Twenty Eight</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_ConstelliumSESeniorUnsecuredNotesIssuedJuneTwoThousandTwentyDueTwoThousandTwentyEightMember" xlink:label="loc_cstm_ConstelliumSESeniorUnsecuredNotesIssuedJuneTwoThousandTwentyDueTwoThousandTwentyEightMember_B4FE70D8C8B4227B3C29771382CAD5CE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_ConstelliumSESeniorUnsecuredNotesIssuedJuneTwoThousandTwentyDueTwoThousandTwentyEightMember_B4FE70D8C8B4227B3C29771382CAD5CE" xlink:to="lab_cstm_ConstelliumSESeniorUnsecuredNotesIssuedJuneTwoThousandTwentyDueTwoThousandTwentyEightMember_B4FE70D8C8B4227B3C29771382CAD5CE" xlink:type="arc" />
    <link:label id="lab_cstm_UnsecuredRevolvingCreditFacilitiesDueInTwoThousandTwentyOneMember_71D95831B4FF00014C80771382CB51A0_terseLabel_en-US" xlink:label="lab_cstm_UnsecuredRevolvingCreditFacilitiesDueInTwoThousandTwentyOneMember_71D95831B4FF00014C80771382CB51A0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unsecured Revolving Credit Facility (due 2021)</link:label>
    <link:label id="lab_cstm_UnsecuredRevolvingCreditFacilitiesDueInTwoThousandTwentyOneMember_71D95831B4FF00014C80771382CB51A0_label_en-US" xlink:label="lab_cstm_UnsecuredRevolvingCreditFacilitiesDueInTwoThousandTwentyOneMember_71D95831B4FF00014C80771382CB51A0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unsecured Revolving Credit Facilities Due In Two Thousand Twenty One [member]</link:label>
    <link:label id="lab_cstm_UnsecuredRevolvingCreditFacilitiesDueInTwoThousandTwentyOneMember_71D95831B4FF00014C80771382CB51A0_documentation_en-US" xlink:label="lab_cstm_UnsecuredRevolvingCreditFacilitiesDueInTwoThousandTwentyOneMember_71D95831B4FF00014C80771382CB51A0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Unsecured Revolving Credit Facilities Due In Two Thousand Twenty One [member]</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_UnsecuredRevolvingCreditFacilitiesDueInTwoThousandTwentyOneMember" xlink:label="loc_cstm_UnsecuredRevolvingCreditFacilitiesDueInTwoThousandTwentyOneMember_71D95831B4FF00014C80771382CB51A0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_UnsecuredRevolvingCreditFacilitiesDueInTwoThousandTwentyOneMember_71D95831B4FF00014C80771382CB51A0" xlink:to="lab_cstm_UnsecuredRevolvingCreditFacilitiesDueInTwoThousandTwentyOneMember_71D95831B4FF00014C80771382CB51A0" xlink:type="arc" />
    <link:label id="lab_cstm_UnsecuredCreditFacilitySwitzerlandMember_569431904E85C00909E0771382CB1A42_terseLabel_en-US" xlink:label="lab_cstm_UnsecuredCreditFacilitySwitzerlandMember_569431904E85C00909E0771382CB1A42" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unsecured Credit facility Switzerland (due 2025)</link:label>
    <link:label id="lab_cstm_UnsecuredCreditFacilitySwitzerlandMember_569431904E85C00909E0771382CB1A42_label_en-US" xlink:label="lab_cstm_UnsecuredCreditFacilitySwitzerlandMember_569431904E85C00909E0771382CB1A42" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unsecured Credit Facility Switzerland [Member]</link:label>
    <link:label id="lab_cstm_UnsecuredCreditFacilitySwitzerlandMember_569431904E85C00909E0771382CB1A42_documentation_en-US" xlink:label="lab_cstm_UnsecuredCreditFacilitySwitzerlandMember_569431904E85C00909E0771382CB1A42" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Unsecured Credit Facility Switzerland</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_UnsecuredCreditFacilitySwitzerlandMember" xlink:label="loc_cstm_UnsecuredCreditFacilitySwitzerlandMember_569431904E85C00909E0771382CB1A42" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_UnsecuredCreditFacilitySwitzerlandMember_569431904E85C00909E0771382CB1A42" xlink:to="lab_cstm_UnsecuredCreditFacilitySwitzerlandMember_569431904E85C00909E0771382CB1A42" xlink:type="arc" />
    <link:label id="lab_cstm_OtherLoansMember_6E2E8BBA4C0CEE848122771382CB29F4_terseLabel_en-US" xlink:label="lab_cstm_OtherLoansMember_6E2E8BBA4C0CEE848122771382CB29F4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other loans</link:label>
    <link:label id="lab_cstm_OtherLoansMember_6E2E8BBA4C0CEE848122771382CB29F4_label_en-US" xlink:label="lab_cstm_OtherLoansMember_6E2E8BBA4C0CEE848122771382CB29F4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other loans [member]</link:label>
    <link:label id="lab_cstm_OtherLoansMember_6E2E8BBA4C0CEE848122771382CB29F4_documentation_en-US" xlink:label="lab_cstm_OtherLoansMember_6E2E8BBA4C0CEE848122771382CB29F4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other loans.</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_OtherLoansMember" xlink:label="loc_cstm_OtherLoansMember_6E2E8BBA4C0CEE848122771382CB29F4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_OtherLoansMember_6E2E8BBA4C0CEE848122771382CB29F4" xlink:to="lab_cstm_OtherLoansMember_6E2E8BBA4C0CEE848122771382CB29F4" xlink:type="arc" />
    <link:label id="lab_cstm_FinancingArrangementsMember_86F65476087DDE6BBD6F771382CBA5C7_terseLabel_en-US" xlink:label="lab_cstm_FinancingArrangementsMember_86F65476087DDE6BBD6F771382CBA5C7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Arrangements</link:label>
    <link:label id="lab_cstm_FinancingArrangementsMember_86F65476087DDE6BBD6F771382CBA5C7_label_en-US" xlink:label="lab_cstm_FinancingArrangementsMember_86F65476087DDE6BBD6F771382CBA5C7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Arrangements [Member]</link:label>
    <link:label id="lab_cstm_FinancingArrangementsMember_86F65476087DDE6BBD6F771382CBA5C7_documentation_en-US" xlink:label="lab_cstm_FinancingArrangementsMember_86F65476087DDE6BBD6F771382CBA5C7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Financing Arrangements</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_FinancingArrangementsMember" xlink:label="loc_cstm_FinancingArrangementsMember_86F65476087DDE6BBD6F771382CBA5C7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_FinancingArrangementsMember_86F65476087DDE6BBD6F771382CBA5C7" xlink:to="lab_cstm_FinancingArrangementsMember_86F65476087DDE6BBD6F771382CBA5C7" xlink:type="arc" />
    <link:label id="lab_cstm_GuarantorAxis_9E8D2CA34BED6BAEAFEB771382CB7797_terseLabel_en-US" xlink:label="lab_cstm_GuarantorAxis_9E8D2CA34BED6BAEAFEB771382CB7797" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Guarantor [Axis]</link:label>
    <link:label id="lab_cstm_GuarantorAxis_9E8D2CA34BED6BAEAFEB771382CB7797_label_en-US" xlink:label="lab_cstm_GuarantorAxis_9E8D2CA34BED6BAEAFEB771382CB7797" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Guarantor [Axis]</link:label>
    <link:label id="lab_cstm_GuarantorAxis_9E8D2CA34BED6BAEAFEB771382CB7797_documentation_en-US" xlink:label="lab_cstm_GuarantorAxis_9E8D2CA34BED6BAEAFEB771382CB7797" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Guarantor</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_GuarantorAxis" xlink:label="loc_cstm_GuarantorAxis_9E8D2CA34BED6BAEAFEB771382CB7797" xlink:type="locator" />
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    <link:label id="lab_cstm_GuarantorDomain_90FA9AF4656907405D5B771382CBDE57_terseLabel_en-US" xlink:label="lab_cstm_GuarantorDomain_90FA9AF4656907405D5B771382CBDE57" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Guarantor [Domain]</link:label>
    <link:label id="lab_cstm_GuarantorDomain_90FA9AF4656907405D5B771382CBDE57_label_en-US" xlink:label="lab_cstm_GuarantorDomain_90FA9AF4656907405D5B771382CBDE57" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Guarantor [Domain]</link:label>
    <link:label id="lab_cstm_GuarantorDomain_90FA9AF4656907405D5B771382CBDE57_documentation_en-US" xlink:label="lab_cstm_GuarantorDomain_90FA9AF4656907405D5B771382CBDE57" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Guarantor</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_GuarantorDomain" xlink:label="loc_cstm_GuarantorDomain_90FA9AF4656907405D5B771382CBDE57" xlink:type="locator" />
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    <link:label id="lab_cstm_FrenchGovernmentMember_3A55B39F93F517160234771382CC818E_terseLabel_en-US" xlink:label="lab_cstm_FrenchGovernmentMember_3A55B39F93F517160234771382CC818E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">French State</link:label>
    <link:label id="lab_cstm_FrenchGovernmentMember_3A55B39F93F517160234771382CC818E_label_en-US" xlink:label="lab_cstm_FrenchGovernmentMember_3A55B39F93F517160234771382CC818E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">French Government [Member]</link:label>
    <link:label id="lab_cstm_FrenchGovernmentMember_3A55B39F93F517160234771382CC818E_documentation_en-US" xlink:label="lab_cstm_FrenchGovernmentMember_3A55B39F93F517160234771382CC818E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">French Government</link:label>
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    <link:label id="lab_cstm_SwissGovernmentMember_D088EFFA8640D5B3349E771382CCDAB2_terseLabel_en-US" xlink:label="lab_cstm_SwissGovernmentMember_D088EFFA8640D5B3349E771382CCDAB2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Swiss State</link:label>
    <link:label id="lab_cstm_SwissGovernmentMember_D088EFFA8640D5B3349E771382CCDAB2_label_en-US" xlink:label="lab_cstm_SwissGovernmentMember_D088EFFA8640D5B3349E771382CCDAB2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Swiss Government [Member]</link:label>
    <link:label id="lab_cstm_SwissGovernmentMember_D088EFFA8640D5B3349E771382CCDAB2_documentation_en-US" xlink:label="lab_cstm_SwissGovernmentMember_D088EFFA8640D5B3349E771382CCDAB2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Swiss Government</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_SwissGovernmentMember" xlink:label="loc_cstm_SwissGovernmentMember_D088EFFA8640D5B3349E771382CCDAB2" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_SubsidiariesMember_7ABB0E01EDBFA418060D771382CD91D1_terseLabel_en-US" xlink:label="lab_ifrs-full_SubsidiariesMember_7ABB0E01EDBFA418060D771382CD91D1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">BPI France</link:label>
    <link:label id="lab_ifrs-full_SubsidiariesMember_7ABB0E01EDBFA418060D771382CD91D1_label_en-US" xlink:label="lab_ifrs-full_SubsidiariesMember_7ABB0E01EDBFA418060D771382CD91D1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsidiaries [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SubsidiariesMember" xlink:label="loc_ifrs-full_SubsidiariesMember_7ABB0E01EDBFA418060D771382CD91D1" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_C8443742B86FCE52144D771382CD1D69" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_NotionalAmount_3E87B3701E81611E12DA771382CD6903_terseLabel_en-US" xlink:label="lab_ifrs-full_NotionalAmount_3E87B3701E81611E12DA771382CD6903" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Nominal value</link:label>
    <link:label id="lab_ifrs-full_NotionalAmount_3E87B3701E81611E12DA771382CD6903_label_en-US" xlink:label="lab_ifrs-full_NotionalAmount_3E87B3701E81611E12DA771382CD6903" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Notional amount</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NotionalAmount" xlink:label="loc_ifrs-full_NotionalAmount_3E87B3701E81611E12DA771382CD6903" xlink:type="locator" />
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    <link:label id="lab_cstm_BorrowingsNominalInterestRate_53655BDBA8C9A13711D1771382CD309C_terseLabel_en-US" xlink:label="lab_cstm_BorrowingsNominalInterestRate_53655BDBA8C9A13711D1771382CD309C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Nominal rate</link:label>
    <link:label id="lab_cstm_BorrowingsNominalInterestRate_53655BDBA8C9A13711D1771382CD309C_label_en-US" xlink:label="lab_cstm_BorrowingsNominalInterestRate_53655BDBA8C9A13711D1771382CD309C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Borrowings Nominal Interest Rate</link:label>
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    <link:loc xlink:href="cstm-20200630.xsd#cstm_BorrowingsNominalInterestRate" xlink:label="loc_cstm_BorrowingsNominalInterestRate_53655BDBA8C9A13711D1771382CD309C" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_BorrowingsInterestRate_C065F0FCFE97B093F731771382CE43DB_terseLabel_en-US" xlink:label="lab_ifrs-full_BorrowingsInterestRate_C065F0FCFE97B093F731771382CE43DB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effective rate</link:label>
    <link:label id="lab_ifrs-full_BorrowingsInterestRate_C065F0FCFE97B093F731771382CE43DB_label_en-US" xlink:label="lab_ifrs-full_BorrowingsInterestRate_C065F0FCFE97B093F731771382CE43DB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Borrowings, interest rate</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsInterestRate" xlink:label="loc_ifrs-full_BorrowingsInterestRate_C065F0FCFE97B093F731771382CE43DB" xlink:type="locator" />
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    <link:label id="lab_cstm_BorrowingsArrangementFeesStepUp_26F9F23C99EC7F18F6EF771382CE924E_documentation_en-US" xlink:label="lab_cstm_BorrowingsArrangementFeesStepUp_26F9F23C99EC7F18F6EF771382CE924E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Borrowings arrangement fees or (step up).</link:label>
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    <link:label id="lab_cstm_AccruedInterest_D89621D0BBED4A9F05CC771382CEF38A_terseLabel_en-US" xlink:label="lab_cstm_AccruedInterest_D89621D0BBED4A9F05CC771382CEF38A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued interests</link:label>
    <link:label id="lab_cstm_AccruedInterest_D89621D0BBED4A9F05CC771382CEF38A_label_en-US" xlink:label="lab_cstm_AccruedInterest_D89621D0BBED4A9F05CC771382CEF38A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued interest</link:label>
    <link:label id="lab_cstm_AccruedInterest_D89621D0BBED4A9F05CC771382CEF38A_documentation_en-US" xlink:label="lab_cstm_AccruedInterest_D89621D0BBED4A9F05CC771382CEF38A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of interest accrued but is not yet paid.</link:label>
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    <link:label id="lab_ifrs-full_GrossLeaseLiabilities_126629F18A9554B530FC771382CE5BCD_terseLabel_en-US" xlink:label="lab_ifrs-full_GrossLeaseLiabilities_126629F18A9554B530FC771382CE5BCD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gross lease liabilities</link:label>
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    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GrossLeaseLiabilities" xlink:label="loc_ifrs-full_GrossLeaseLiabilities_126629F18A9554B530FC771382CE5BCD" xlink:type="locator" />
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    <link:label id="lab_cstm_InterestAccruedOnLeaseLiabilities_58D8AC08023F66389EF6771382CE5D93_terseLabel_en-US" xlink:label="lab_cstm_InterestAccruedOnLeaseLiabilities_58D8AC08023F66389EF6771382CE5D93" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest accrued lease liabilities</link:label>
    <link:label id="lab_cstm_InterestAccruedOnLeaseLiabilities_58D8AC08023F66389EF6771382CE5D93_label_en-US" xlink:label="lab_cstm_InterestAccruedOnLeaseLiabilities_58D8AC08023F66389EF6771382CE5D93" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Accrued On Lease Liabilities</link:label>
    <link:label id="lab_cstm_InterestAccruedOnLeaseLiabilities_58D8AC08023F66389EF6771382CE5D93_documentation_en-US" xlink:label="lab_cstm_InterestAccruedOnLeaseLiabilities_58D8AC08023F66389EF6771382CE5D93" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Accrued On Lease Liabilities</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_InterestAccruedOnLeaseLiabilities" xlink:label="loc_cstm_InterestAccruedOnLeaseLiabilities_58D8AC08023F66389EF6771382CE5D93" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_LeaseLiabilities_3C216680ACA443B80D72771382CE9B83_terseLabel_en-US" xlink:label="lab_ifrs-full_LeaseLiabilities_3C216680ACA443B80D72771382CE9B83" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Leases</link:label>
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    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LeaseLiabilities" xlink:label="loc_ifrs-full_LeaseLiabilities_3C216680ACA443B80D72771382CE9B83" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_OtherIntangibleAssetsMember_7DCFB603D852F253890B5ECB01D9CD3D_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherIntangibleAssetsMember_7DCFB603D852F253890B5ECB01D9CD3D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
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    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="loc_ifrs-full_CarryingAmountMember_BD8E59377E138766EB9D5ECB01D982D9" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_GrossCarryingAmountMember_83753A9662F046F1E1A55ECB01D9CD3B_terseLabel_en-US" xlink:label="lab_ifrs-full_GrossCarryingAmountMember_83753A9662F046F1E1A55ECB01D9CD3B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cost</link:label>
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    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ChangesInGoodwillAbstract" xlink:label="loc_ifrs-full_ChangesInGoodwillAbstract_30A8D3D1EDD2CA3442445ECB01DAD334" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_Goodwill_04D28774F57C660684CA5ECB01DA6E59_label_en-US" xlink:label="lab_ifrs-full_Goodwill_04D28774F57C660684CA5ECB01DA6E59" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Goodwill" xlink:label="loc_ifrs-full_Goodwill_04D28774F57C660684CA5ECB01DA6E59" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesGoodwill_30BDA4238CD0B8F2B1A35ECB01DBB4AB_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesGoodwill_30BDA4238CD0B8F2B1A35ECB01DBB4AB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effects of changes in foreign exchange rates</link:label>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill_51973532944EE84280FD5ECB01DCDD6E_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill_51973532944EE84280FD5ECB01DCDD6E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effects of changes in foreign exchange rates</link:label>
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    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill_51973532944EE84280FD5ECB01DCDD6E" xlink:type="locator" />
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    <link:label id="lab_cstm_ShareBasedPaymentPlansTable_DD569084CD27A3F51B5B5F09E851FC99_terseLabel_en-US" xlink:label="lab_cstm_ShareBasedPaymentPlansTable_DD569084CD27A3F51B5B5F09E851FC99" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share Based Payment Plans [table]</link:label>
    <link:label id="lab_cstm_ShareBasedPaymentPlansTable_DD569084CD27A3F51B5B5F09E851FC99_label_en-US" xlink:label="lab_cstm_ShareBasedPaymentPlansTable_DD569084CD27A3F51B5B5F09E851FC99" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Based Payment Plans [table]</link:label>
    <link:label id="lab_cstm_ShareBasedPaymentPlansTable_DD569084CD27A3F51B5B5F09E851FC99_documentation_en-US" xlink:label="lab_cstm_ShareBasedPaymentPlansTable_DD569084CD27A3F51B5B5F09E851FC99" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share based payment plans.</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_ShareBasedPaymentPlansTable" xlink:label="loc_cstm_ShareBasedPaymentPlansTable_DD569084CD27A3F51B5B5F09E851FC99" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_ShareBasedPaymentPlansTable_DD569084CD27A3F51B5B5F09E851FC99" xlink:to="lab_cstm_ShareBasedPaymentPlansTable_DD569084CD27A3F51B5B5F09E851FC99" xlink:type="arc" />
    <link:label id="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_7A2F4ED02985835138A35F09E852F3E1_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_7A2F4ED02985835138A35F09E852F3E1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Types of share-based payment arrangements [axis]</link:label>
    <link:label id="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_7A2F4ED02985835138A35F09E852F3E1_label_en-US" xlink:label="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_7A2F4ED02985835138A35F09E852F3E1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Types of share-based payment arrangements [axis]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_7A2F4ED02985835138A35F09E852F3E1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_7A2F4ED02985835138A35F09E852F3E1" xlink:to="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_7A2F4ED02985835138A35F09E852F3E1" xlink:type="arc" />
    <link:label id="lab_ifrs-full_SharebasedPaymentArrangementsMember_E8B774E7259BDBE21D865F09E8521160_terseLabel_en-US" xlink:label="lab_ifrs-full_SharebasedPaymentArrangementsMember_E8B774E7259BDBE21D865F09E8521160" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based payment arrangements [member]</link:label>
    <link:label id="lab_ifrs-full_SharebasedPaymentArrangementsMember_E8B774E7259BDBE21D865F09E8521160_label_en-US" xlink:label="lab_ifrs-full_SharebasedPaymentArrangementsMember_E8B774E7259BDBE21D865F09E8521160" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based payment arrangements [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharebasedPaymentArrangementsMember" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_E8B774E7259BDBE21D865F09E8521160" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_E8B774E7259BDBE21D865F09E8521160" xlink:to="lab_ifrs-full_SharebasedPaymentArrangementsMember_E8B774E7259BDBE21D865F09E8521160" xlink:type="arc" />
    <link:label id="lab_cstm_PerformanceShareUnitsMember_23C47D3B22F05B1B62F15F09E853D3C1_terseLabel_en-US" xlink:label="lab_cstm_PerformanceShareUnitsMember_23C47D3B22F05B1B62F15F09E853D3C1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PSUs</link:label>
    <link:label id="lab_cstm_PerformanceShareUnitsMember_23C47D3B22F05B1B62F15F09E853D3C1_label_en-US" xlink:label="lab_cstm_PerformanceShareUnitsMember_23C47D3B22F05B1B62F15F09E853D3C1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Performance share units (PSUs) [member]</link:label>
    <link:label id="lab_cstm_PerformanceShareUnitsMember_23C47D3B22F05B1B62F15F09E853D3C1_documentation_en-US" xlink:label="lab_cstm_PerformanceShareUnitsMember_23C47D3B22F05B1B62F15F09E853D3C1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Performance share units (PSUs) .</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_PerformanceShareUnitsMember" xlink:label="loc_cstm_PerformanceShareUnitsMember_23C47D3B22F05B1B62F15F09E853D3C1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_PerformanceShareUnitsMember_23C47D3B22F05B1B62F15F09E853D3C1" xlink:to="lab_cstm_PerformanceShareUnitsMember_23C47D3B22F05B1B62F15F09E853D3C1" xlink:type="arc" />
    <link:label id="lab_cstm_RestrictedStockUnitsMember_7C84A98BC673832C9BB25F5078D3275D_verboseLabel_en-US" xlink:label="lab_cstm_RestrictedStockUnitsMember_7C84A98BC673832C9BB25F5078D3275D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">RSUs</link:label>
    <link:label id="lab_cstm_RestrictedStockUnitsMember_7C84A98BC673832C9BB25F5078D3275D_label_en-US" xlink:label="lab_cstm_RestrictedStockUnitsMember_7C84A98BC673832C9BB25F5078D3275D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restricted stock units [member]</link:label>
    <link:label id="lab_cstm_RestrictedStockUnitsMember_7C84A98BC673832C9BB25F5078D3275D_documentation_en-US" xlink:label="lab_cstm_RestrictedStockUnitsMember_7C84A98BC673832C9BB25F5078D3275D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Restricted stock units.</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_RestrictedStockUnitsMember" xlink:label="loc_cstm_RestrictedStockUnitsMember_7C84A98BC673832C9BB25F5078D3275D" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_RangeAxis_DD81C1618956B622D81A5F09E8531A11_terseLabel_en-US" xlink:label="lab_ifrs-full_RangeAxis_DD81C1618956B622D81A5F09E8531A11" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Range [axis]</link:label>
    <link:label id="lab_ifrs-full_RangeAxis_DD81C1618956B622D81A5F09E8531A11_label_en-US" xlink:label="lab_ifrs-full_RangeAxis_DD81C1618956B622D81A5F09E8531A11" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Range [axis]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangeAxis" xlink:label="loc_ifrs-full_RangeAxis_DD81C1618956B622D81A5F09E8531A11" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_RangesMember_1A506AFFE53019F34E815F09E853496C_label_en-US" xlink:label="lab_ifrs-full_RangesMember_1A506AFFE53019F34E815F09E853496C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ranges [member]</link:label>
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    <link:label id="lab_cstm_PercentageOfSharebasedPaymentsVestingMultiplier_A6D0F53C52DA3D9B12475F09E855F54F_terseLabel_en-US" xlink:label="lab_cstm_PercentageOfSharebasedPaymentsVestingMultiplier_A6D0F53C52DA3D9B12475F09E855F54F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of vesting multiplier</link:label>
    <link:label id="lab_cstm_PercentageOfSharebasedPaymentsVestingMultiplier_A6D0F53C52DA3D9B12475F09E855F54F_label_en-US" xlink:label="lab_cstm_PercentageOfSharebasedPaymentsVestingMultiplier_A6D0F53C52DA3D9B12475F09E855F54F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage of sharebased payments vesting multiplier</link:label>
    <link:label id="lab_cstm_PercentageOfSharebasedPaymentsVestingMultiplier_A6D0F53C52DA3D9B12475F09E855F54F_documentation_en-US" xlink:label="lab_cstm_PercentageOfSharebasedPaymentsVestingMultiplier_A6D0F53C52DA3D9B12475F09E855F54F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage of sharebased payments vesting multiplier.</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_PercentageOfSharebasedPaymentsVestingMultiplier" xlink:label="loc_cstm_PercentageOfSharebasedPaymentsVestingMultiplier_A6D0F53C52DA3D9B12475F09E855F54F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_PercentageOfSharebasedPaymentsVestingMultiplier_A6D0F53C52DA3D9B12475F09E855F54F" xlink:to="lab_cstm_PercentageOfSharebasedPaymentsVestingMultiplier_A6D0F53C52DA3D9B12475F09E855F54F" xlink:type="arc" />
    <link:label id="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_0762F2A9D44591CEA9DA5F09E855B96D_terseLabel_en-US" xlink:label="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_0762F2A9D44591CEA9DA5F09E855B96D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total expense related to the potential ordinary shares</link:label>
    <link:label id="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_0762F2A9D44591CEA9DA5F09E855B96D_label_en-US" xlink:label="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_0762F2A9D44591CEA9DA5F09E855B96D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Expense from share-based payment transactions with employees</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:label="loc_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_0762F2A9D44591CEA9DA5F09E855B96D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_0762F2A9D44591CEA9DA5F09E855B96D" xlink:to="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_0762F2A9D44591CEA9DA5F09E855B96D" xlink:type="arc" />
    <link:label id="lab_ifrs-full_RevenueAbstract_E668C9A023AACF209A6D5835A1E8D084_label_en-US" xlink:label="lab_ifrs-full_RevenueAbstract_E668C9A023AACF209A6D5835A1E8D084" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue [abstract]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RevenueAbstract" xlink:label="loc_ifrs-full_RevenueAbstract_E668C9A023AACF209A6D5835A1E8D084" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RevenueAbstract_E668C9A023AACF209A6D5835A1E8D084" xlink:to="lab_ifrs-full_RevenueAbstract_E668C9A023AACF209A6D5835A1E8D084" xlink:type="arc" />
    <link:label id="lab_ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory_0F99F18247AD641E353C5835A1E8464D_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory_0F99F18247AD641E353C5835A1E8464D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">REVENUE</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory_0F99F18247AD641E353C5835A1E8464D_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory_0F99F18247AD641E353C5835A1E8464D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of revenue from contracts with customers [text block]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory" xlink:label="loc_ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory_0F99F18247AD641E353C5835A1E8464D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory_0F99F18247AD641E353C5835A1E8464D" xlink:to="lab_ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory_0F99F18247AD641E353C5835A1E8464D" xlink:type="arc" />
    <link:label id="lab_cstm_AgingOfTradeReceivablesTable_957AE4CAC323C5C281895835A0A4A874_terseLabel_en-US" xlink:label="lab_cstm_AgingOfTradeReceivablesTable_957AE4CAC323C5C281895835A0A4A874" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aging of trade receivables [table]</link:label>
    <link:label id="lab_cstm_AgingOfTradeReceivablesTable_957AE4CAC323C5C281895835A0A4A874_label_en-US" xlink:label="lab_cstm_AgingOfTradeReceivablesTable_957AE4CAC323C5C281895835A0A4A874" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aging Of Trade Receivables [table]</link:label>
    <link:label id="lab_cstm_AgingOfTradeReceivablesTable_957AE4CAC323C5C281895835A0A4A874_documentation_en-US" xlink:label="lab_cstm_AgingOfTradeReceivablesTable_957AE4CAC323C5C281895835A0A4A874" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Aging of trade receivables.</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_AgingOfTradeReceivablesTable" xlink:label="loc_cstm_AgingOfTradeReceivablesTable_957AE4CAC323C5C281895835A0A4A874" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_AgingOfTradeReceivablesTable_957AE4CAC323C5C281895835A0A4A874" xlink:to="lab_cstm_AgingOfTradeReceivablesTable_957AE4CAC323C5C281895835A0A4A874" xlink:type="arc" />
    <link:label id="lab_ifrs-full_PastDueStatusAxis_0FBFFDE812AEA4BFDD165835A0A47683_terseLabel_en-US" xlink:label="lab_ifrs-full_PastDueStatusAxis_0FBFFDE812AEA4BFDD165835A0A47683" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Past due status [axis]</link:label>
    <link:label id="lab_ifrs-full_PastDueStatusAxis_0FBFFDE812AEA4BFDD165835A0A47683_label_en-US" xlink:label="lab_ifrs-full_PastDueStatusAxis_0FBFFDE812AEA4BFDD165835A0A47683" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Past due status [axis]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PastDueStatusAxis" xlink:label="loc_ifrs-full_PastDueStatusAxis_0FBFFDE812AEA4BFDD165835A0A47683" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PastDueStatusAxis_0FBFFDE812AEA4BFDD165835A0A47683" xlink:to="lab_ifrs-full_PastDueStatusAxis_0FBFFDE812AEA4BFDD165835A0A47683" xlink:type="arc" />
    <link:label id="lab_ifrs-full_PastDueStatusMember_0AF11C415A0066E289615835A0A5AD06_terseLabel_en-US" xlink:label="lab_ifrs-full_PastDueStatusMember_0AF11C415A0066E289615835A0A5AD06" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Past due status [member]</link:label>
    <link:label id="lab_ifrs-full_PastDueStatusMember_0AF11C415A0066E289615835A0A5AD06_label_en-US" xlink:label="lab_ifrs-full_PastDueStatusMember_0AF11C415A0066E289615835A0A5AD06" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Past due status [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PastDueStatusMember" xlink:label="loc_ifrs-full_PastDueStatusMember_0AF11C415A0066E289615835A0A5AD06" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PastDueStatusMember_0AF11C415A0066E289615835A0A5AD06" xlink:to="lab_ifrs-full_PastDueStatusMember_0AF11C415A0066E289615835A0A5AD06" xlink:type="arc" />
    <link:label id="lab_ifrs-full_CurrentMember_C398E159FB9FCD4A46A05835A0A5058F_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentMember_C398E159FB9FCD4A46A05835A0A5058F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Not past due</link:label>
    <link:label id="lab_ifrs-full_CurrentMember_C398E159FB9FCD4A46A05835A0A5058F_label_en-US" xlink:label="lab_ifrs-full_CurrentMember_C398E159FB9FCD4A46A05835A0A5058F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentMember" xlink:label="loc_ifrs-full_CurrentMember_C398E159FB9FCD4A46A05835A0A5058F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentMember_C398E159FB9FCD4A46A05835A0A5058F" xlink:to="lab_ifrs-full_CurrentMember_C398E159FB9FCD4A46A05835A0A5058F" xlink:type="arc" />
    <link:label id="lab_cstm_PastDueOneToThirtyDaysMember_3E2A82311809B227A8E05835A0A51173_terseLabel_en-US" xlink:label="lab_cstm_PastDueOneToThirtyDaysMember_3E2A82311809B227A8E05835A0A51173" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">1 &#8211; 30 days past due</link:label>
    <link:label id="lab_cstm_PastDueOneToThirtyDaysMember_3E2A82311809B227A8E05835A0A51173_label_en-US" xlink:label="lab_cstm_PastDueOneToThirtyDaysMember_3E2A82311809B227A8E05835A0A51173" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Past Due One to Thirty Days [member]</link:label>
    <link:label id="lab_cstm_PastDueOneToThirtyDaysMember_3E2A82311809B227A8E05835A0A51173_documentation_en-US" xlink:label="lab_cstm_PastDueOneToThirtyDaysMember_3E2A82311809B227A8E05835A0A51173" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Past due 1-30 days.</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_PastDueOneToThirtyDaysMember" xlink:label="loc_cstm_PastDueOneToThirtyDaysMember_3E2A82311809B227A8E05835A0A51173" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_PastDueOneToThirtyDaysMember_3E2A82311809B227A8E05835A0A51173" xlink:to="lab_cstm_PastDueOneToThirtyDaysMember_3E2A82311809B227A8E05835A0A51173" xlink:type="arc" />
    <link:label id="lab_ifrs-full_LaterThanOneMonthAndNotLaterThanTwoMonthsMember_BD3863116B222142BB885835A0A599E8_terseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanOneMonthAndNotLaterThanTwoMonthsMember_BD3863116B222142BB885835A0A599E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">31 &#8211; 60 days past due</link:label>
    <link:label id="lab_ifrs-full_LaterThanOneMonthAndNotLaterThanTwoMonthsMember_BD3863116B222142BB885835A0A599E8_label_en-US" xlink:label="lab_ifrs-full_LaterThanOneMonthAndNotLaterThanTwoMonthsMember_BD3863116B222142BB885835A0A599E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Later than one month and not later than two months [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanOneMonthAndNotLaterThanTwoMonthsMember" xlink:label="loc_ifrs-full_LaterThanOneMonthAndNotLaterThanTwoMonthsMember_BD3863116B222142BB885835A0A599E8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LaterThanOneMonthAndNotLaterThanTwoMonthsMember_BD3863116B222142BB885835A0A599E8" xlink:to="lab_ifrs-full_LaterThanOneMonthAndNotLaterThanTwoMonthsMember_BD3863116B222142BB885835A0A599E8" xlink:type="arc" />
    <link:label id="lab_ifrs-full_LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember_B26B230113D9C3280B815835A0A5E999_terseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember_B26B230113D9C3280B815835A0A5E999" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">61 &#8211; 90 days past due</link:label>
    <link:label id="lab_ifrs-full_LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember_B26B230113D9C3280B815835A0A5E999_label_en-US" xlink:label="lab_ifrs-full_LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember_B26B230113D9C3280B815835A0A5E999" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Later than two months and not later than three months [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember" xlink:label="loc_ifrs-full_LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember_B26B230113D9C3280B815835A0A5E999" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_LaterThanThreeMonthsMember_A70CE100183AA35F759A5835A0A6CDB6_terseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanThreeMonthsMember_A70CE100183AA35F759A5835A0A6CDB6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Greater than 90 days past due</link:label>
    <link:label id="lab_ifrs-full_LaterThanThreeMonthsMember_A70CE100183AA35F759A5835A0A6CDB6_label_en-US" xlink:label="lab_ifrs-full_LaterThanThreeMonthsMember_A70CE100183AA35F759A5835A0A6CDB6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Later than three months [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanThreeMonthsMember" xlink:label="loc_ifrs-full_LaterThanThreeMonthsMember_A70CE100183AA35F759A5835A0A6CDB6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LaterThanThreeMonthsMember_A70CE100183AA35F759A5835A0A6CDB6" xlink:to="lab_ifrs-full_LaterThanThreeMonthsMember_A70CE100183AA35F759A5835A0A6CDB6" xlink:type="arc" />
    <link:label id="lab_cstm_TradeReceivablesLineItems_EC80CC4C7B97E9B7F46E5835A0A6B4F5_terseLabel_en-US" xlink:label="lab_cstm_TradeReceivablesLineItems_EC80CC4C7B97E9B7F46E5835A0A6B4F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trade receivables [line items]</link:label>
    <link:label id="lab_cstm_TradeReceivablesLineItems_EC80CC4C7B97E9B7F46E5835A0A6B4F5_label_en-US" xlink:label="lab_cstm_TradeReceivablesLineItems_EC80CC4C7B97E9B7F46E5835A0A6B4F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trade Receivables [line items]</link:label>
    <link:label id="lab_cstm_TradeReceivablesLineItems_EC80CC4C7B97E9B7F46E5835A0A6B4F5_documentation_en-US" xlink:label="lab_cstm_TradeReceivablesLineItems_EC80CC4C7B97E9B7F46E5835A0A6B4F5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Trade receivables [line items]</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_TradeReceivablesLineItems" xlink:label="loc_cstm_TradeReceivablesLineItems_EC80CC4C7B97E9B7F46E5835A0A6B4F5" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_TradeReceivables_1D1B4E5B61EE9BC6AD3B5835A0A62D1E_verboseLabel_en-US" xlink:label="lab_ifrs-full_TradeReceivables_1D1B4E5B61EE9BC6AD3B5835A0A62D1E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Trade receivables</link:label>
    <link:label id="lab_ifrs-full_TradeReceivables_1D1B4E5B61EE9BC6AD3B5835A0A62D1E_label_en-US" xlink:label="lab_ifrs-full_TradeReceivables_1D1B4E5B61EE9BC6AD3B5835A0A62D1E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trade receivables</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeReceivables" xlink:label="loc_ifrs-full_TradeReceivables_1D1B4E5B61EE9BC6AD3B5835A0A62D1E" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentContractLiabilities" xlink:label="loc_ifrs-full_CurrentContractLiabilities_81239C7C91F854EF03145ECB01B98498" xlink:type="locator" />
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    <link:label id="lab_cstm_OneLargestCustomerMember_73270D55335FD6859E1E5835A1C755A6_terseLabel_en-US" xlink:label="lab_cstm_OneLargestCustomerMember_73270D55335FD6859E1E5835A1C755A6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">One largest customer</link:label>
    <link:label id="lab_cstm_OneLargestCustomerMember_73270D55335FD6859E1E5835A1C755A6_label_en-US" xlink:label="lab_cstm_OneLargestCustomerMember_73270D55335FD6859E1E5835A1C755A6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">One Largest Customer [Member]</link:label>
    <link:label id="lab_cstm_OneLargestCustomerMember_73270D55335FD6859E1E5835A1C755A6_documentation_en-US" xlink:label="lab_cstm_OneLargestCustomerMember_73270D55335FD6859E1E5835A1C755A6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">One Largest Customer</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_OneLargestCustomerMember" xlink:label="loc_cstm_OneLargestCustomerMember_73270D55335FD6859E1E5835A1C755A6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_OneLargestCustomerMember_73270D55335FD6859E1E5835A1C755A6" xlink:to="lab_cstm_OneLargestCustomerMember_73270D55335FD6859E1E5835A1C755A6" xlink:type="arc" />
    <link:label id="lab_cstm_TwoLargestCustomersMember_F39B9F883BD26D68EB675835A1C76868_terseLabel_en-US" xlink:label="lab_cstm_TwoLargestCustomersMember_F39B9F883BD26D68EB675835A1C76868" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Two largest customers</link:label>
    <link:label id="lab_cstm_TwoLargestCustomersMember_F39B9F883BD26D68EB675835A1C76868_label_en-US" xlink:label="lab_cstm_TwoLargestCustomersMember_F39B9F883BD26D68EB675835A1C76868" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Two Largest Customers [member]</link:label>
    <link:label id="lab_cstm_TwoLargestCustomersMember_F39B9F883BD26D68EB675835A1C76868_documentation_en-US" xlink:label="lab_cstm_TwoLargestCustomersMember_F39B9F883BD26D68EB675835A1C76868" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two largest customers.</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_TwoLargestCustomersMember" xlink:label="loc_cstm_TwoLargestCustomersMember_F39B9F883BD26D68EB675835A1C76868" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_TwoLargestCustomersMember_F39B9F883BD26D68EB675835A1C76868" xlink:to="lab_cstm_TwoLargestCustomersMember_F39B9F883BD26D68EB675835A1C76868" xlink:type="arc" />
    <link:label id="lab_ifrs-full_DisclosureOfOperatingSegmentsLineItems_E79BDDE73BD11647E3635835A1C737BF_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfOperatingSegmentsLineItems_E79BDDE73BD11647E3635835A1C737BF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disclosure of operating segments [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfOperatingSegmentsLineItems_E79BDDE73BD11647E3635835A1C737BF_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfOperatingSegmentsLineItems_E79BDDE73BD11647E3635835A1C737BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of operating segments [line items]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_E79BDDE73BD11647E3635835A1C737BF" xlink:type="locator" />
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    <link:label id="lab_cstm_NumberOfFacilities_84728EFC8391927955F15835A1C7F296_terseLabel_en-US" xlink:label="lab_cstm_NumberOfFacilities_84728EFC8391927955F15835A1C7F296" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of facilities</link:label>
    <link:label id="lab_cstm_NumberOfFacilities_84728EFC8391927955F15835A1C7F296_label_en-US" xlink:label="lab_cstm_NumberOfFacilities_84728EFC8391927955F15835A1C7F296" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number Of Facilities</link:label>
    <link:label id="lab_cstm_NumberOfFacilities_84728EFC8391927955F15835A1C7F296_documentation_en-US" xlink:label="lab_cstm_NumberOfFacilities_84728EFC8391927955F15835A1C7F296" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number of facilities.</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_NumberOfFacilities" xlink:label="loc_cstm_NumberOfFacilities_84728EFC8391927955F15835A1C7F296" xlink:type="locator" />
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    <link:label id="lab_cstm_NumberOfCountriesInWhichEntityOperates1_8A091F838A3036884C5B5835A1C75A31_terseLabel_en-US" xlink:label="lab_cstm_NumberOfCountriesInWhichEntityOperates1_8A091F838A3036884C5B5835A1C75A31" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of countries in which entity operates</link:label>
    <link:label id="lab_cstm_NumberOfCountriesInWhichEntityOperates1_8A091F838A3036884C5B5835A1C75A31_label_en-US" xlink:label="lab_cstm_NumberOfCountriesInWhichEntityOperates1_8A091F838A3036884C5B5835A1C75A31" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number Of Countries In Which Entity Operates1</link:label>
    <link:label id="lab_cstm_NumberOfCountriesInWhichEntityOperates1_8A091F838A3036884C5B5835A1C75A31_documentation_en-US" xlink:label="lab_cstm_NumberOfCountriesInWhichEntityOperates1_8A091F838A3036884C5B5835A1C75A31" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number Of Countries In Which Entity Operates1</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_NumberOfCountriesInWhichEntityOperates1" xlink:label="loc_cstm_NumberOfCountriesInWhichEntityOperates1_8A091F838A3036884C5B5835A1C75A31" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_NumberOfEmployees_894FB29C618B6CA1961C5835A1C7D2E3_terseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfEmployees_894FB29C618B6CA1961C5835A1C7D2E3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of employees</link:label>
    <link:label id="lab_ifrs-full_NumberOfEmployees_894FB29C618B6CA1961C5835A1C7D2E3_label_en-US" xlink:label="lab_ifrs-full_NumberOfEmployees_894FB29C618B6CA1961C5835A1C7D2E3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of employees</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfEmployees" xlink:label="loc_ifrs-full_NumberOfEmployees_894FB29C618B6CA1961C5835A1C7D2E3" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_RevenueFromContractsWithCustomers_EEF8A60247CB186A80105835A1C7A056_terseLabel_en-US" xlink:label="lab_ifrs-full_RevenueFromContractsWithCustomers_EEF8A60247CB186A80105835A1C7A056" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenue</link:label>
    <link:label id="lab_ifrs-full_RevenueFromContractsWithCustomers_EEF8A60247CB186A80105835A1C7A056_label_en-US" xlink:label="lab_ifrs-full_RevenueFromContractsWithCustomers_EEF8A60247CB186A80105835A1C7A056" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue from contracts with customers</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RevenueFromContractsWithCustomers" xlink:label="loc_ifrs-full_RevenueFromContractsWithCustomers_EEF8A60247CB186A80105835A1C7A056" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract_63D07752A5EBEE89FBA25835A0922DBD_label_en-US" xlink:label="lab_ifrs-full_SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract_63D07752A5EBEE89FBA25835A0922DBD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subclassifications of assets, liabilities and equities [abstract]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract" xlink:label="loc_ifrs-full_SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract_63D07752A5EBEE89FBA25835A0922DBD" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_DisclosureOfInventoriesExplanatory_67FB619AAB08FD07CAC45835A0938F1B_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfInventoriesExplanatory_67FB619AAB08FD07CAC45835A0938F1B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">INVENTORIES</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfInventoriesExplanatory_67FB619AAB08FD07CAC45835A0938F1B_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfInventoriesExplanatory_67FB619AAB08FD07CAC45835A0938F1B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of inventories [text block]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfInventoriesExplanatory" xlink:label="loc_ifrs-full_DisclosureOfInventoriesExplanatory_67FB619AAB08FD07CAC45835A0938F1B" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_SegmentConsolidationItemsAxis_5EA1DB01159EAFD5A4F55835A1B7BF52_terseLabel_en-US" xlink:label="lab_ifrs-full_SegmentConsolidationItemsAxis_5EA1DB01159EAFD5A4F55835A1B7BF52" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segment consolidation items [axis]</link:label>
    <link:label id="lab_ifrs-full_SegmentConsolidationItemsAxis_5EA1DB01159EAFD5A4F55835A1B7BF52_label_en-US" xlink:label="lab_ifrs-full_SegmentConsolidationItemsAxis_5EA1DB01159EAFD5A4F55835A1B7BF52" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment consolidation items [axis]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentConsolidationItemsAxis" xlink:label="loc_ifrs-full_SegmentConsolidationItemsAxis_5EA1DB01159EAFD5A4F55835A1B7BF52" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SegmentConsolidationItemsAxis_5EA1DB01159EAFD5A4F55835A1B7BF52" xlink:to="lab_ifrs-full_SegmentConsolidationItemsAxis_5EA1DB01159EAFD5A4F55835A1B7BF52" xlink:type="arc" />
    <link:label id="lab_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_511D6E88FE157953A05E5835A1B7893D_terseLabel_en-US" xlink:label="lab_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_511D6E88FE157953A05E5835A1B7893D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity's total for segment consolidation items [member]</link:label>
    <link:label id="lab_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_511D6E88FE157953A05E5835A1B7893D_label_en-US" xlink:label="lab_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_511D6E88FE157953A05E5835A1B7893D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity's total for segment consolidation items [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:label="loc_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_511D6E88FE157953A05E5835A1B7893D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_511D6E88FE157953A05E5835A1B7893D" xlink:to="lab_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_511D6E88FE157953A05E5835A1B7893D" xlink:type="arc" />
    <link:label id="lab_ifrs-full_OperatingSegmentsMember_25853F86E1DCB0D8E3ED5835A1B75CB1_terseLabel_en-US" xlink:label="lab_ifrs-full_OperatingSegmentsMember_25853F86E1DCB0D8E3ED5835A1B75CB1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segment revenue</link:label>
    <link:label id="lab_ifrs-full_OperatingSegmentsMember_25853F86E1DCB0D8E3ED5835A1B75CB1_label_en-US" xlink:label="lab_ifrs-full_OperatingSegmentsMember_25853F86E1DCB0D8E3ED5835A1B75CB1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating segments [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OperatingSegmentsMember" xlink:label="loc_ifrs-full_OperatingSegmentsMember_25853F86E1DCB0D8E3ED5835A1B75CB1" xlink:type="locator" />
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    <link:label id="lab_cstm_HoldingsAndCorporateMember_DAE020824E63506118FD5835A1B73C09_terseLabel_en-US" xlink:label="lab_cstm_HoldingsAndCorporateMember_DAE020824E63506118FD5835A1B73C09" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Holdings &amp; Corporate</link:label>
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    <link:label id="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_25DA43A949D6CA3F435D5ECA33EC774D_label_en-US" xlink:label="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_25DA43A949D6CA3F435D5ECA33EC774D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Classes of property, plant and equipment [axis]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_25DA43A949D6CA3F435D5ECA33EC774D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_25DA43A949D6CA3F435D5ECA33EC774D" xlink:to="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_25DA43A949D6CA3F435D5ECA33EC774D" xlink:type="arc" />
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipmentMember_15E9C8D87C2FD43374EC5ECA33EC104F_terseLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipmentMember_15E9C8D87C2FD43374EC5ECA33EC104F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, plant and equipment [member]</link:label>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipmentMember_15E9C8D87C2FD43374EC5ECA33EC104F_label_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipmentMember_15E9C8D87C2FD43374EC5ECA33EC104F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, plant and equipment [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentMember" xlink:label="loc_ifrs-full_PropertyPlantAndEquipmentMember_15E9C8D87C2FD43374EC5ECA33EC104F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PropertyPlantAndEquipmentMember_15E9C8D87C2FD43374EC5ECA33EC104F" xlink:to="lab_ifrs-full_PropertyPlantAndEquipmentMember_15E9C8D87C2FD43374EC5ECA33EC104F" xlink:type="arc" />
    <link:label id="lab_cstm_LandAndPropertyRightsMember_72791B8FE4642CA305985ECA33EC6250_terseLabel_en-US" xlink:label="lab_cstm_LandAndPropertyRightsMember_72791B8FE4642CA305985ECA33EC6250" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Land and Property Rights</link:label>
    <link:label id="lab_cstm_LandAndPropertyRightsMember_72791B8FE4642CA305985ECA33EC6250_label_en-US" xlink:label="lab_cstm_LandAndPropertyRightsMember_72791B8FE4642CA305985ECA33EC6250" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Land and Property Rights [member]</link:label>
    <link:label id="lab_cstm_LandAndPropertyRightsMember_72791B8FE4642CA305985ECA33EC6250_documentation_en-US" xlink:label="lab_cstm_LandAndPropertyRightsMember_72791B8FE4642CA305985ECA33EC6250" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Land and property rights.</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_LandAndPropertyRightsMember" xlink:label="loc_cstm_LandAndPropertyRightsMember_72791B8FE4642CA305985ECA33EC6250" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_LandAndPropertyRightsMember_72791B8FE4642CA305985ECA33EC6250" xlink:to="lab_cstm_LandAndPropertyRightsMember_72791B8FE4642CA305985ECA33EC6250" xlink:type="arc" />
    <link:label id="lab_ifrs-full_BuildingsMember_E47F45B09F095B13D2BC5ECA33ECC258_terseLabel_en-US" xlink:label="lab_ifrs-full_BuildingsMember_E47F45B09F095B13D2BC5ECA33ECC258" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Buildings</link:label>
    <link:label id="lab_ifrs-full_BuildingsMember_E47F45B09F095B13D2BC5ECA33ECC258_label_en-US" xlink:label="lab_ifrs-full_BuildingsMember_E47F45B09F095B13D2BC5ECA33ECC258" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Buildings [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BuildingsMember" xlink:label="loc_ifrs-full_BuildingsMember_E47F45B09F095B13D2BC5ECA33ECC258" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_BuildingsMember_E47F45B09F095B13D2BC5ECA33ECC258" xlink:to="lab_ifrs-full_BuildingsMember_E47F45B09F095B13D2BC5ECA33ECC258" xlink:type="arc" />
    <link:label id="lab_cstm_MachineryAndEquipment1Member_97A673638B2038BD25825ECA33ECBB5C_terseLabel_en-US" xlink:label="lab_cstm_MachineryAndEquipment1Member_97A673638B2038BD25825ECA33ECBB5C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Machinery and Equipment</link:label>
    <link:label id="lab_cstm_MachineryAndEquipment1Member_97A673638B2038BD25825ECA33ECBB5C_label_en-US" xlink:label="lab_cstm_MachineryAndEquipment1Member_97A673638B2038BD25825ECA33ECBB5C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Machinery And Equipment1 [member]</link:label>
    <link:label id="lab_cstm_MachineryAndEquipment1Member_97A673638B2038BD25825ECA33ECBB5C_documentation_en-US" xlink:label="lab_cstm_MachineryAndEquipment1Member_97A673638B2038BD25825ECA33ECBB5C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Machinery and equipment.</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_MachineryAndEquipment1Member" xlink:label="loc_cstm_MachineryAndEquipment1Member_97A673638B2038BD25825ECA33ECBB5C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_MachineryAndEquipment1Member_97A673638B2038BD25825ECA33ECBB5C" xlink:to="lab_cstm_MachineryAndEquipment1Member_97A673638B2038BD25825ECA33ECBB5C" xlink:type="arc" />
    <link:label id="lab_ifrs-full_ConstructionInProgressMember_E1157252C64F059CA4F95ECA33EC0AD1_terseLabel_en-US" xlink:label="lab_ifrs-full_ConstructionInProgressMember_E1157252C64F059CA4F95ECA33EC0AD1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Construction Work in Progress</link:label>
    <link:label id="lab_ifrs-full_ConstructionInProgressMember_E1157252C64F059CA4F95ECA33EC0AD1_label_en-US" xlink:label="lab_ifrs-full_ConstructionInProgressMember_E1157252C64F059CA4F95ECA33EC0AD1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Construction in progress [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ConstructionInProgressMember" xlink:label="loc_ifrs-full_ConstructionInProgressMember_E1157252C64F059CA4F95ECA33EC0AD1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ConstructionInProgressMember_E1157252C64F059CA4F95ECA33EC0AD1" xlink:to="lab_ifrs-full_ConstructionInProgressMember_E1157252C64F059CA4F95ECA33EC0AD1" xlink:type="arc" />
    <link:label id="lab_ifrs-full_OtherPropertyPlantAndEquipmentMember_033819CEF6BEB1ADB42B5ECA33EC7102_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherPropertyPlantAndEquipmentMember_033819CEF6BEB1ADB42B5ECA33EC7102" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_ifrs-full_OtherPropertyPlantAndEquipmentMember_033819CEF6BEB1ADB42B5ECA33EC7102_label_en-US" xlink:label="lab_ifrs-full_OtherPropertyPlantAndEquipmentMember_033819CEF6BEB1ADB42B5ECA33EC7102" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other property, plant and equipment [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherPropertyPlantAndEquipmentMember" xlink:label="loc_ifrs-full_OtherPropertyPlantAndEquipmentMember_033819CEF6BEB1ADB42B5ECA33EC7102" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherPropertyPlantAndEquipmentMember_033819CEF6BEB1ADB42B5ECA33EC7102" xlink:to="lab_ifrs-full_OtherPropertyPlantAndEquipmentMember_033819CEF6BEB1ADB42B5ECA33EC7102" xlink:type="arc" />
    <link:label id="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_6429CD5E9B17F07363445ECA33EC7571_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_6429CD5E9B17F07363445ECA33EC7571" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disclosure of detailed information about property, plant and equipment [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_6429CD5E9B17F07363445ECA33EC7571_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_6429CD5E9B17F07363445ECA33EC7571" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of detailed information about property, plant and equipment [line items]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_6429CD5E9B17F07363445ECA33EC7571" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_6429CD5E9B17F07363445ECA33EC7571" xlink:to="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_6429CD5E9B17F07363445ECA33EC7571" xlink:type="arc" />
    <link:label id="lab_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_19CBFD494E70611B6E9A5ECA33ECEC24_terseLabel_en-US" xlink:label="lab_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_19CBFD494E70611B6E9A5ECA33ECEC24" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reconciliation of changes in property, plant and equipment [abstract]</link:label>
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    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract" xlink:label="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_19CBFD494E70611B6E9A5ECA33ECEC24" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_PropertyPlantAndEquipment_F9529BBB7E0274F5D05F5ECA33ECC72C_periodStartLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipment_F9529BBB7E0274F5D05F5ECA33ECC72C" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipment_F9529BBB7E0274F5D05F5ECA33ECC72C_label_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipment_F9529BBB7E0274F5D05F5ECA33ECC72C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, plant and equipment</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipment" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment_F9529BBB7E0274F5D05F5ECA33ECC72C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PropertyPlantAndEquipment_F9529BBB7E0274F5D05F5ECA33ECC72C" xlink:to="lab_ifrs-full_PropertyPlantAndEquipment_F9529BBB7E0274F5D05F5ECA33ECC72C" xlink:type="arc" />
    <link:label id="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_37B0F3CE28CFF8D6AAC85ECA33EC101D_terseLabel_en-US" xlink:label="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_37B0F3CE28CFF8D6AAC85ECA33EC101D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additions</link:label>
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    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:label="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_37B0F3CE28CFF8D6AAC85ECA33EC101D" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_DisposalsPropertyPlantAndEquipment_A5D833865219FC520DE05ECA33EC79DE_negatedLabel_en-US" xlink:label="lab_ifrs-full_DisposalsPropertyPlantAndEquipment_A5D833865219FC520DE05ECA33EC79DE" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Disposals</link:label>
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    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisposalsPropertyPlantAndEquipment" xlink:label="loc_ifrs-full_DisposalsPropertyPlantAndEquipment_A5D833865219FC520DE05ECA33EC79DE" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_DepreciationPropertyPlantAndEquipment_C1D11984A88304E83E395ECA33EC9990_negatedLabel_en-US" xlink:label="lab_ifrs-full_DepreciationPropertyPlantAndEquipment_C1D11984A88304E83E395ECA33EC9990" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Depreciation and impairment</link:label>
    <link:label id="lab_ifrs-full_DepreciationPropertyPlantAndEquipment_C1D11984A88304E83E395ECA33EC9990_label_en-US" xlink:label="lab_ifrs-full_DepreciationPropertyPlantAndEquipment_C1D11984A88304E83E395ECA33EC9990" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Depreciation, property, plant and equipment</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DepreciationPropertyPlantAndEquipment" xlink:label="loc_ifrs-full_DepreciationPropertyPlantAndEquipment_C1D11984A88304E83E395ECA33EC9990" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment_7C0F3040BFC7DDA1C8C15ECA33EC484A_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment_7C0F3040BFC7DDA1C8C15ECA33EC484A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transfer during the year</link:label>
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    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment_7C0F3040BFC7DDA1C8C15ECA33EC484A" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_StatementOfFinancialPositionAbstract_51E448AD5EEF9A2A82D35835A23EEAFF_label_en-US" xlink:label="lab_ifrs-full_StatementOfFinancialPositionAbstract_51E448AD5EEF9A2A82D35835A23EEAFF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of financial position [abstract]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_StatementOfFinancialPositionAbstract" xlink:label="loc_ifrs-full_StatementOfFinancialPositionAbstract_51E448AD5EEF9A2A82D35835A23EEAFF" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_AssetsAbstract_4ED75932AE991DC40BA35835A23E062A_label_en-US" xlink:label="lab_ifrs-full_AssetsAbstract_4ED75932AE991DC40BA35835A23E062A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets [abstract]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AssetsAbstract" xlink:label="loc_ifrs-full_AssetsAbstract_4ED75932AE991DC40BA35835A23E062A" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_CurrentAssetsAbstract_1AB0C76645B34B4E960D5835A23E0B03_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentAssetsAbstract_1AB0C76645B34B4E960D5835A23E0B03" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current assets</link:label>
    <link:label id="lab_ifrs-full_CurrentAssetsAbstract_1AB0C76645B34B4E960D5835A23E0B03_label_en-US" xlink:label="lab_ifrs-full_CurrentAssetsAbstract_1AB0C76645B34B4E960D5835A23E0B03" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current assets [abstract]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentAssetsAbstract" xlink:label="loc_ifrs-full_CurrentAssetsAbstract_1AB0C76645B34B4E960D5835A23E0B03" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_CashAndCashEquivalents_C4C4ED77FDE296FA1BCC5835A23E1BFC_terseLabel_en-US" xlink:label="lab_ifrs-full_CashAndCashEquivalents_C4C4ED77FDE296FA1BCC5835A23E1BFC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:label id="lab_ifrs-full_CashAndCashEquivalents_C4C4ED77FDE296FA1BCC5835A23E1BFC_label_en-US" xlink:label="lab_ifrs-full_CashAndCashEquivalents_C4C4ED77FDE296FA1BCC5835A23E1BFC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="loc_ifrs-full_CashAndCashEquivalents_C4C4ED77FDE296FA1BCC5835A23E1BFC" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_TradeAndOtherCurrentReceivables_A8DC90B2F74D2961EB3B5835A23E001B_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentReceivables_A8DC90B2F74D2961EB3B5835A23E001B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trade receivables and other</link:label>
    <link:label id="lab_ifrs-full_TradeAndOtherCurrentReceivables_A8DC90B2F74D2961EB3B5835A23E001B_label_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentReceivables_A8DC90B2F74D2961EB3B5835A23E001B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trade and other current receivables</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeAndOtherCurrentReceivables" xlink:label="loc_ifrs-full_TradeAndOtherCurrentReceivables_A8DC90B2F74D2961EB3B5835A23E001B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TradeAndOtherCurrentReceivables_A8DC90B2F74D2961EB3B5835A23E001B" xlink:to="lab_ifrs-full_TradeAndOtherCurrentReceivables_A8DC90B2F74D2961EB3B5835A23E001B" xlink:type="arc" />
    <link:label id="lab_ifrs-full_InventoriesAtNetRealisableValue_B292314A2AC2443E58355835A23E03E1_terseLabel_en-US" xlink:label="lab_ifrs-full_InventoriesAtNetRealisableValue_B292314A2AC2443E58355835A23E03E1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Inventories</link:label>
    <link:label id="lab_ifrs-full_InventoriesAtNetRealisableValue_B292314A2AC2443E58355835A23E03E1_label_en-US" xlink:label="lab_ifrs-full_InventoriesAtNetRealisableValue_B292314A2AC2443E58355835A23E03E1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Inventories, at net realisable value</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InventoriesAtNetRealisableValue" xlink:label="loc_ifrs-full_InventoriesAtNetRealisableValue_B292314A2AC2443E58355835A23E03E1" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_OtherCurrentFinancialAssets_9AE9C93140DAD308D2415835A23E6392_verboseLabel_en-US" xlink:label="lab_ifrs-full_OtherCurrentFinancialAssets_9AE9C93140DAD308D2415835A23E6392" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other financial assets</link:label>
    <link:label id="lab_ifrs-full_OtherCurrentFinancialAssets_9AE9C93140DAD308D2415835A23E6392_label_en-US" xlink:label="lab_ifrs-full_OtherCurrentFinancialAssets_9AE9C93140DAD308D2415835A23E6392" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other current financial assets</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherCurrentFinancialAssets" xlink:label="loc_ifrs-full_OtherCurrentFinancialAssets_9AE9C93140DAD308D2415835A23E6392" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_CurrentAssets_C42318466C32147073115835A23EA6FA_totalLabel_en-US" xlink:label="lab_ifrs-full_CurrentAssets_C42318466C32147073115835A23EA6FA" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total current assets</link:label>
    <link:label id="lab_ifrs-full_CurrentAssets_C42318466C32147073115835A23EA6FA_label_en-US" xlink:label="lab_ifrs-full_CurrentAssets_C42318466C32147073115835A23EA6FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current assets</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentAssets" xlink:label="loc_ifrs-full_CurrentAssets_C42318466C32147073115835A23EA6FA" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_NoncurrentAssetsAbstract_C787D59B660AAA65C50B5835A23E29EA_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentAssetsAbstract_C787D59B660AAA65C50B5835A23E29EA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-current assets</link:label>
    <link:label id="lab_ifrs-full_NoncurrentAssetsAbstract_C787D59B660AAA65C50B5835A23E29EA_label_en-US" xlink:label="lab_ifrs-full_NoncurrentAssetsAbstract_C787D59B660AAA65C50B5835A23E29EA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-current assets [abstract]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentAssetsAbstract" xlink:label="loc_ifrs-full_NoncurrentAssetsAbstract_C787D59B660AAA65C50B5835A23E29EA" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_PropertyPlantAndEquipment_8A1B48B4EA745E7A00F95835A23EFA73_terseLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipment_8A1B48B4EA745E7A00F95835A23EFA73" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, plant and equipment</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipment" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment_8A1B48B4EA745E7A00F95835A23EFA73" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_Goodwill_F33ABF137C814A3BF5AD5835A23EAB8A_terseLabel_en-US" xlink:label="lab_ifrs-full_Goodwill_F33ABF137C814A3BF5AD5835A23EAB8A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Goodwill" xlink:label="loc_ifrs-full_Goodwill_F33ABF137C814A3BF5AD5835A23EAB8A" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill_0816AEB14945E283E5945835A23EBD87_terseLabel_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill_0816AEB14945E283E5945835A23EBD87" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Intangible assets</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:label="loc_ifrs-full_IntangibleAssetsOtherThanGoodwill_0816AEB14945E283E5945835A23EBD87" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_InvestmentAccountedForUsingEquityMethod_2CF7D599D8BD655822A25835A23E5892_verboseLabel_en-US" xlink:label="lab_ifrs-full_InvestmentAccountedForUsingEquityMethod_2CF7D599D8BD655822A25835A23E5892" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Investments accounted for under the equity method</link:label>
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    <link:label id="lab_ifrs-full_NoncurrentReceivables_27829A90B441A3F4B6E15835A23EE8A9_verboseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentReceivables_27829A90B441A3F4B6E15835A23EE8A9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Trade receivables and other</link:label>
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    <link:label id="lab_cstm_OtherCountriesMember_D26C45EA399B59764C3858359DD3F5F1_verboseLabel_en-US" xlink:label="lab_cstm_OtherCountriesMember_D26C45EA399B59764C3858359DD3F5F1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_OtherCountriesMember" xlink:label="loc_cstm_OtherCountriesMember_D26C45EA399B59764C3858359DD3F5F1" xlink:type="locator" />
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    <link:label id="lab_cstm_DefinedBenefitObligation_0E560E8AD5E4D655A40058359DD37FE2_label_en-US" xlink:label="lab_cstm_DefinedBenefitObligation_0E560E8AD5E4D655A40058359DD37FE2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Obligation</link:label>
    <link:label id="lab_cstm_DefinedBenefitObligation_0E560E8AD5E4D655A40058359DD37FE2_documentation_en-US" xlink:label="lab_cstm_DefinedBenefitObligation_0E560E8AD5E4D655A40058359DD37FE2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Defined benefit obligation.</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_DefinedBenefitObligation" xlink:label="loc_cstm_DefinedBenefitObligation_0E560E8AD5E4D655A40058359DD37FE2" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_PlanAssetsAtFairValue_696CB962FD57EFF8BFE758359DD31C67_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_PlanAssetsAtFairValue_696CB962FD57EFF8BFE758359DD31C67" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Plan assets</link:label>
    <link:label id="lab_ifrs-full_PlanAssetsAtFairValue_696CB962FD57EFF8BFE758359DD31C67_label_en-US" xlink:label="lab_ifrs-full_PlanAssetsAtFairValue_696CB962FD57EFF8BFE758359DD31C67" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan assets, at fair value</link:label>
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    <link:label id="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_95482D7C8D2D78CFB20D58359DD42EE3_totalLabel_en-US" xlink:label="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_95482D7C8D2D78CFB20D58359DD42EE3" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net defined benefit liability</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:label="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_95482D7C8D2D78CFB20D58359DD42EE3" xlink:type="locator" />
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    <link:label id="lab_cstm_PercentageOfRevolvingLoanCommitments_D634925C22A0805469AF58359F91CDAE_terseLabel_en-US" xlink:label="lab_cstm_PercentageOfRevolvingLoanCommitments_D634925C22A0805469AF58359F91CDAE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt covenant, percentage of aggregate revolving loan commitments</link:label>
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    <link:label id="lab_cstm_PercentageOfRevolvingLoanCommitments_D634925C22A0805469AF58359F91CDAE_documentation_en-US" xlink:label="lab_cstm_PercentageOfRevolvingLoanCommitments_D634925C22A0805469AF58359F91CDAE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage of excess availability vs. aggregate revolving commitment that require an evaluation of compliance.</link:label>
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    <link:label id="lab_ifrs-full_IncomeStatementAbstract_53EAFEB121CF90D455745835A25D671B_label_en-US" xlink:label="lab_ifrs-full_IncomeStatementAbstract_53EAFEB121CF90D455745835A25D671B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Profit or loss [abstract]</link:label>
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    <link:label id="lab_ifrs-full_CostOfSales_AD361E9E77DC51679FB25835A25DF530_label_en-US" xlink:label="lab_ifrs-full_CostOfSales_AD361E9E77DC51679FB25835A25DF530" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cost of sales</link:label>
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    <link:label id="lab_ifrs-full_ResearchAndDevelopmentExpense_F16B6471FCECBE2011E95835A25D2BB7_negatedLabel_en-US" xlink:label="lab_ifrs-full_ResearchAndDevelopmentExpense_F16B6471FCECBE2011E95835A25D2BB7" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Research and development expenses</link:label>
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    <link:label id="lab_ifrs-full_ExpenseOfRestructuringActivities_CB5A3887F00F7D21E51C5835A25D32AC_negatedLabel_en-US" xlink:label="lab_ifrs-full_ExpenseOfRestructuringActivities_CB5A3887F00F7D21E51C5835A25D32AC" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Restructuring costs</link:label>
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    <link:label id="lab_ifrs-full_OtherGainsLosses_FA93CDCE37B0353008395835A25D6BF0_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherGainsLosses_FA93CDCE37B0353008395835A25D6BF0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other gains / (losses) - net</link:label>
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    <link:label id="lab_ifrs-full_ProfitLossFromOperatingActivities_65616C1140E83A7080E25835A25D334B_totalLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossFromOperatingActivities_65616C1140E83A7080E25835A25D334B" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">(Loss) / income from operations</link:label>
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    <link:label id="lab_ifrs-full_FinanceIncomeCost_4BE0CEFD53152BE7DDE65835A25D2332_terseLabel_en-US" xlink:label="lab_ifrs-full_FinanceIncomeCost_4BE0CEFD53152BE7DDE65835A25D2332" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Finance costs - net</link:label>
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    <link:label id="lab_ifrs-full_OtherNoncurrentPayables_E130ECBB17636C5AEE455835A0163FF6_label_en-US" xlink:label="lab_ifrs-full_OtherNoncurrentPayables_E130ECBB17636C5AEE455835A0163FF6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other non-current payables</link:label>
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    <link:label id="lab_cstm_OtherNoncurrentPayablesOther_17A4E4B8615471297B1F5835A01615DE_label_en-US" xlink:label="lab_cstm_OtherNoncurrentPayablesOther_17A4E4B8615471297B1F5835A01615DE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other non-current payables, other</link:label>
    <link:label id="lab_cstm_OtherNoncurrentPayablesOther_17A4E4B8615471297B1F5835A01615DE_documentation_en-US" xlink:label="lab_cstm_OtherNoncurrentPayablesOther_17A4E4B8615471297B1F5835A01615DE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other non-current payables, other.</link:label>
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    <link:label id="lab_ifrs-full_NoncurrentPayables_90E1FD9998BC3C5F368B5835A0164B43_totalLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentPayables_90E1FD9998BC3C5F368B5835A0164B43" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total trade payables and other</link:label>
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    <link:label id="lab_ifrs-full_TradeAndOtherCurrentPayablesAbstract_9E676C921B59CE3245115835A017D083_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentPayablesAbstract_9E676C921B59CE3245115835A017D083" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current</link:label>
    <link:label id="lab_ifrs-full_TradeAndOtherCurrentPayablesAbstract_9E676C921B59CE3245115835A017D083_label_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentPayablesAbstract_9E676C921B59CE3245115835A017D083" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trade and other current payables [abstract]</link:label>
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    <link:label id="lab_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers_D135C7813E6EEF40FAA75835A0171E0A_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers_D135C7813E6EEF40FAA75835A0171E0A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trade payables</link:label>
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    <link:label id="lab_ifrs-full_CurrentPayablesForPurchaseOfNoncurrentAssets_1B5457D547C60E3812F45835A0173A52_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentPayablesForPurchaseOfNoncurrentAssets_1B5457D547C60E3812F45835A0173A52" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fixed assets payables</link:label>
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    <link:label id="lab_ifrs-full_ShorttermEmployeeBenefitsAccruals_AA8095DED0C4B2E0B3E75835A017F2EC_terseLabel_en-US" xlink:label="lab_ifrs-full_ShorttermEmployeeBenefitsAccruals_AA8095DED0C4B2E0B3E75835A017F2EC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employees' entitlements</link:label>
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    <link:label id="lab_ifrs-full_CurrentContractLiabilities_3CC30F4CE760F4B8A2BD5835A018B04A_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentContractLiabilities_3CC30F4CE760F4B8A2BD5835A018B04A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contract liabilities and other liabilities to customers</link:label>
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    <link:label id="lab_ifrs-full_OtherCurrentPayables_199570283B41B0DFE39F5835A0180F21_label_en-US" xlink:label="lab_ifrs-full_OtherCurrentPayables_199570283B41B0DFE39F5835A0180F21" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other current payables</link:label>
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    <link:label id="lab_cstm_RevenueFromContractWithCustomersMember_C82B86A88C8B3ABDDE96586A0FB0E6D2_terseLabel_en-US" xlink:label="lab_cstm_RevenueFromContractWithCustomersMember_C82B86A88C8B3ABDDE96586A0FB0E6D2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Included in Revenue</link:label>
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    <link:label id="lab_cstm_CostOfSales1Member_D0ED2063B1FA5DA205F7586A0FB0448C_terseLabel_en-US" xlink:label="lab_cstm_CostOfSales1Member_D0ED2063B1FA5DA205F7586A0FB0448C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Included in Cost of sales</link:label>
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    <link:label id="lab_cstm_OtherCostMember_4E70FE760E7794D8C7605835A0AA05C3_documentation_en-US" xlink:label="lab_cstm_OtherCostMember_4E70FE760E7794D8C7605835A0AA05C3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other cost.</link:label>
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    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:label="loc_ifrs-full_AllLevelsOfFairValueHierarchyMember_18DDF7406799C7F8410058359F2C9DA8" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_Level2OfFairValueHierarchyMember_3872396F6DE710EAAA8758359F2CC57E_label_en-US" xlink:label="lab_ifrs-full_Level2OfFairValueHierarchyMember_3872396F6DE710EAAA8758359F2CC57E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Level 2 of fair value hierarchy [member]</link:label>
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    <link:loc xlink:href="cstm-20200630.xsd#cstm_RevolvingCreditFacilityOutstanding" xlink:label="loc_cstm_RevolvingCreditFacilityOutstanding_F10287A3B603ADE75322767C47782CE3" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_FinancialAssetsHeldForManagingLiquidityRisk_8479D7F9D5CD9864DF0D767C47784354_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialAssetsHeldForManagingLiquidityRisk_8479D7F9D5CD9864DF0D767C47784354" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liquidity value</link:label>
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    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityMember" xlink:label="loc_ifrs-full_EquityMember_72E361611B7DCD2D152B5835A22F3D42" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EquityMember_72E361611B7DCD2D152B5835A22F3D42" xlink:to="lab_ifrs-full_EquityMember_72E361611B7DCD2D152B5835A22F3D42" xlink:type="arc" />
    <link:label id="lab_ifrs-full_IssuedCapitalMember_11311174B0B6D67E09B95835A22F59F7_terseLabel_en-US" xlink:label="lab_ifrs-full_IssuedCapitalMember_11311174B0B6D67E09B95835A22F59F7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share capital</link:label>
    <link:label id="lab_ifrs-full_IssuedCapitalMember_11311174B0B6D67E09B95835A22F59F7_label_en-US" xlink:label="lab_ifrs-full_IssuedCapitalMember_11311174B0B6D67E09B95835A22F59F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Issued capital [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IssuedCapitalMember" xlink:label="loc_ifrs-full_IssuedCapitalMember_11311174B0B6D67E09B95835A22F59F7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IssuedCapitalMember_11311174B0B6D67E09B95835A22F59F7" xlink:to="lab_ifrs-full_IssuedCapitalMember_11311174B0B6D67E09B95835A22F59F7" xlink:type="arc" />
    <link:label id="lab_ifrs-full_SharePremiumMember_32A73D16EE2F96D0EB895835A22FBE64_terseLabel_en-US" xlink:label="lab_ifrs-full_SharePremiumMember_32A73D16EE2F96D0EB895835A22FBE64" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share premium</link:label>
    <link:label id="lab_ifrs-full_SharePremiumMember_32A73D16EE2F96D0EB895835A22FBE64_label_en-US" xlink:label="lab_ifrs-full_SharePremiumMember_32A73D16EE2F96D0EB895835A22FBE64" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share premium [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharePremiumMember" xlink:label="loc_ifrs-full_SharePremiumMember_32A73D16EE2F96D0EB895835A22FBE64" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SharePremiumMember_32A73D16EE2F96D0EB895835A22FBE64" xlink:to="lab_ifrs-full_SharePremiumMember_32A73D16EE2F96D0EB895835A22FBE64" xlink:type="arc" />
    <link:label id="lab_ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember_3CC7F20F8D412C03E9AB5835A22FD96C_terseLabel_en-US" xlink:label="lab_ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember_3CC7F20F8D412C03E9AB5835A22FD96C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Re-measurement</link:label>
    <link:label id="lab_ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember_3CC7F20F8D412C03E9AB5835A22FD96C_label_en-US" xlink:label="lab_ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember_3CC7F20F8D412C03E9AB5835A22FD96C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reserve of remeasurements of defined benefit plans [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember" xlink:label="loc_ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember_3CC7F20F8D412C03E9AB5835A22FD96C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember_3CC7F20F8D412C03E9AB5835A22FD96C" xlink:to="lab_ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember_3CC7F20F8D412C03E9AB5835A22FD96C" xlink:type="arc" />
    <link:label id="lab_cstm_ReserveOfCashFlowHedgesAndNetInvestmentHedgesMember_B92E09AAA43B89E834EA5835A22F1861_terseLabel_en-US" xlink:label="lab_cstm_ReserveOfCashFlowHedgesAndNetInvestmentHedgesMember_B92E09AAA43B89E834EA5835A22F1861" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash flow hedges</link:label>
    <link:label id="lab_cstm_ReserveOfCashFlowHedgesAndNetInvestmentHedgesMember_B92E09AAA43B89E834EA5835A22F1861_label_en-US" xlink:label="lab_cstm_ReserveOfCashFlowHedgesAndNetInvestmentHedgesMember_B92E09AAA43B89E834EA5835A22F1861" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reserve of cash flow hedges and net investment hedges [member]</link:label>
    <link:label id="lab_cstm_ReserveOfCashFlowHedgesAndNetInvestmentHedgesMember_B92E09AAA43B89E834EA5835A22F1861_documentation_en-US" xlink:label="lab_cstm_ReserveOfCashFlowHedgesAndNetInvestmentHedgesMember_B92E09AAA43B89E834EA5835A22F1861" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reserve of cash flow hedges and net investment hedges.</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_ReserveOfCashFlowHedgesAndNetInvestmentHedgesMember" xlink:label="loc_cstm_ReserveOfCashFlowHedgesAndNetInvestmentHedgesMember_B92E09AAA43B89E834EA5835A22F1861" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_ReserveOfCashFlowHedgesAndNetInvestmentHedgesMember_B92E09AAA43B89E834EA5835A22F1861" xlink:to="lab_cstm_ReserveOfCashFlowHedgesAndNetInvestmentHedgesMember_B92E09AAA43B89E834EA5835A22F1861" xlink:type="arc" />
    <link:label id="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember_D5BD6F3450E31EA324F45835A22FB033_terseLabel_en-US" xlink:label="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember_D5BD6F3450E31EA324F45835A22FB033" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency translation reserve</link:label>
    <link:label id="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember_D5BD6F3450E31EA324F45835A22FB033_label_en-US" xlink:label="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember_D5BD6F3450E31EA324F45835A22FB033" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reserve of exchange differences on translation [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember" xlink:label="loc_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember_D5BD6F3450E31EA324F45835A22FB033" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember_D5BD6F3450E31EA324F45835A22FB033" xlink:to="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember_D5BD6F3450E31EA324F45835A22FB033" xlink:type="arc" />
    <link:label id="lab_ifrs-full_OtherReservesMember_1C86C71A35D077DA4E1E5835A22FB798_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherReservesMember_1C86C71A35D077DA4E1E5835A22FB798" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other reserves</link:label>
    <link:label id="lab_ifrs-full_OtherReservesMember_1C86C71A35D077DA4E1E5835A22FB798_label_en-US" xlink:label="lab_ifrs-full_OtherReservesMember_1C86C71A35D077DA4E1E5835A22FB798" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other reserves [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherReservesMember" xlink:label="loc_ifrs-full_OtherReservesMember_1C86C71A35D077DA4E1E5835A22FB798" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherReservesMember_1C86C71A35D077DA4E1E5835A22FB798" xlink:to="lab_ifrs-full_OtherReservesMember_1C86C71A35D077DA4E1E5835A22FB798" xlink:type="arc" />
    <link:label id="lab_ifrs-full_RetainedEarningsMember_D5E94268A15CE9E8C2DC5835A22F5D28_terseLabel_en-US" xlink:label="lab_ifrs-full_RetainedEarningsMember_D5E94268A15CE9E8C2DC5835A22F5D28" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retained losses</link:label>
    <link:label id="lab_ifrs-full_RetainedEarningsMember_D5E94268A15CE9E8C2DC5835A22F5D28_label_en-US" xlink:label="lab_ifrs-full_RetainedEarningsMember_D5E94268A15CE9E8C2DC5835A22F5D28" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained earnings [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RetainedEarningsMember" xlink:label="loc_ifrs-full_RetainedEarningsMember_D5E94268A15CE9E8C2DC5835A22F5D28" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RetainedEarningsMember_D5E94268A15CE9E8C2DC5835A22F5D28" xlink:to="lab_ifrs-full_RetainedEarningsMember_D5E94268A15CE9E8C2DC5835A22F5D28" xlink:type="arc" />
    <link:label id="lab_ifrs-full_EquityAttributableToOwnersOfParentMember_A7F76E0E75419DD258665835A22F0284_terseLabel_en-US" xlink:label="lab_ifrs-full_EquityAttributableToOwnersOfParentMember_A7F76E0E75419DD258665835A22F0284" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Equity holders of Constellium</link:label>
    <link:label id="lab_ifrs-full_EquityAttributableToOwnersOfParentMember_A7F76E0E75419DD258665835A22F0284_label_en-US" xlink:label="lab_ifrs-full_EquityAttributableToOwnersOfParentMember_A7F76E0E75419DD258665835A22F0284" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity attributable to owners of parent [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:label="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_A7F76E0E75419DD258665835A22F0284" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_A7F76E0E75419DD258665835A22F0284" xlink:to="lab_ifrs-full_EquityAttributableToOwnersOfParentMember_A7F76E0E75419DD258665835A22F0284" xlink:type="arc" />
    <link:label id="lab_ifrs-full_NoncontrollingInterestsMember_7CD180852443145116D45835A22FDBD4_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncontrollingInterestsMember_7CD180852443145116D45835A22FDBD4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-controlling interests</link:label>
    <link:label id="lab_ifrs-full_NoncontrollingInterestsMember_7CD180852443145116D45835A22FDBD4_label_en-US" xlink:label="lab_ifrs-full_NoncontrollingInterestsMember_7CD180852443145116D45835A22FDBD4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-controlling interests [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncontrollingInterestsMember" xlink:label="loc_ifrs-full_NoncontrollingInterestsMember_7CD180852443145116D45835A22FDBD4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NoncontrollingInterestsMember_7CD180852443145116D45835A22FDBD4" xlink:to="lab_ifrs-full_NoncontrollingInterestsMember_7CD180852443145116D45835A22FDBD4" xlink:type="arc" />
    <link:label id="lab_ifrs-full_StatementOfChangesInEquityLineItems_F7F65780C2E52A6A48175835A22FE7AB_terseLabel_en-US" xlink:label="lab_ifrs-full_StatementOfChangesInEquityLineItems_F7F65780C2E52A6A48175835A22FE7AB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement of changes in equity [line items]</link:label>
    <link:label id="lab_ifrs-full_StatementOfChangesInEquityLineItems_F7F65780C2E52A6A48175835A22FE7AB_label_en-US" xlink:label="lab_ifrs-full_StatementOfChangesInEquityLineItems_F7F65780C2E52A6A48175835A22FE7AB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of changes in equity [line items]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_StatementOfChangesInEquityLineItems" xlink:label="loc_ifrs-full_StatementOfChangesInEquityLineItems_F7F65780C2E52A6A48175835A22FE7AB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_F7F65780C2E52A6A48175835A22FE7AB" xlink:to="lab_ifrs-full_StatementOfChangesInEquityLineItems_F7F65780C2E52A6A48175835A22FE7AB" xlink:type="arc" />
    <link:label id="lab_ifrs-full_Equity_A8788B545AF9A9A3E0055835A22FC092_periodStartLabel_en-US" xlink:label="lab_ifrs-full_Equity_A8788B545AF9A9A3E0055835A22FC092" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Equity" xlink:label="loc_ifrs-full_Equity_A8788B545AF9A9A3E0055835A22FC092" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_Equity_A8788B545AF9A9A3E0055835A22FC092" xlink:to="lab_ifrs-full_Equity_A8788B545AF9A9A3E0055835A22FC092" xlink:type="arc" />
    <link:label id="lab_ifrs-full_OtherComprehensiveIncome_F212F36AD6672D80F9A95835A22FC5A3_verboseLabel_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncome_F212F36AD6672D80F9A95835A22FC5A3" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive loss</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherComprehensiveIncome" xlink:label="loc_ifrs-full_OtherComprehensiveIncome_F212F36AD6672D80F9A95835A22FC5A3" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_IssueOfEquity_CB2890BCDF5EF565C21F5835A22F4414_verboseLabel_en-US" xlink:label="lab_ifrs-full_IssueOfEquity_CB2890BCDF5EF565C21F5835A22F4414" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Share issuance</link:label>
    <link:label id="lab_ifrs-full_IssueOfEquity_CB2890BCDF5EF565C21F5835A22F4414_label_en-US" xlink:label="lab_ifrs-full_IssueOfEquity_CB2890BCDF5EF565C21F5835A22F4414" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Issue of equity</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IssueOfEquity" xlink:label="loc_ifrs-full_IssueOfEquity_CB2890BCDF5EF565C21F5835A22F4414" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IssueOfEquity_CB2890BCDF5EF565C21F5835A22F4414" xlink:to="lab_ifrs-full_IssueOfEquity_CB2890BCDF5EF565C21F5835A22F4414" xlink:type="arc" />
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_211004446709B0D172F85835A22F3A92_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_211004446709B0D172F85835A22F3A92" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based compensation</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_211004446709B0D172F85835A22F3A92_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_211004446709B0D172F85835A22F3A92" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (decrease) through share-based payment transactions, equity</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_211004446709B0D172F85835A22F3A92" xlink:type="locator" />
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    <link:label id="lab_cstm_TransactionWithNoncontrollingInterests_D8935ACFE8950FAE30095835A22F6B36_verboseLabel_en-US" xlink:label="lab_cstm_TransactionWithNoncontrollingInterests_D8935ACFE8950FAE30095835A22F6B36" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Transactions with non-controlling interests</link:label>
    <link:label id="lab_cstm_TransactionWithNoncontrollingInterests_D8935ACFE8950FAE30095835A22F6B36_label_en-US" xlink:label="lab_cstm_TransactionWithNoncontrollingInterests_D8935ACFE8950FAE30095835A22F6B36" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Transaction with noncontrolling interests</link:label>
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    <link:label id="lab_ifrs-full_OtherFinanceIncomeCost_2E3603027DC22CA2B6AB7382D181F120_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherFinanceIncomeCost_2E3603027DC22CA2B6AB7382D181F120" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other finance expenses</link:label>
    <link:label id="lab_ifrs-full_OtherFinanceIncomeCost_2E3603027DC22CA2B6AB7382D181F120_label_en-US" xlink:label="lab_ifrs-full_OtherFinanceIncomeCost_2E3603027DC22CA2B6AB7382D181F120" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other finance income (cost)</link:label>
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    <link:label id="lab_cstm_BorrowingCostsCapitalisedCredit_19680F66E4C6D43E18EF7382D181B96D_terseLabel_en-US" xlink:label="lab_cstm_BorrowingCostsCapitalisedCredit_19680F66E4C6D43E18EF7382D181B96D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capitalized borrowing costs</link:label>
    <link:label id="lab_cstm_BorrowingCostsCapitalisedCredit_19680F66E4C6D43E18EF7382D181B96D_label_en-US" xlink:label="lab_cstm_BorrowingCostsCapitalisedCredit_19680F66E4C6D43E18EF7382D181B96D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Borrowing Costs Capitalised Credit</link:label>
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    <link:label id="lab_ifrs-full_FinanceCosts_31472C45DD535BCA4DDF7382D1814389_label_en-US" xlink:label="lab_ifrs-full_FinanceCosts_31472C45DD535BCA4DDF7382D1814389" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finance costs</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinanceCosts" xlink:label="loc_ifrs-full_FinanceCosts_31472C45DD535BCA4DDF7382D1814389" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinanceIncomeCost" xlink:label="loc_ifrs-full_FinanceIncomeCost_38006BA72AC1BEC8EA8A7382D1827616" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_InterestExpenseOnDebtInstrumentsIssued_BA781F6D7379BD76715D7382D182A21A_terseLabel_en-US" xlink:label="lab_ifrs-full_InterestExpenseOnDebtInstrumentsIssued_BA781F6D7379BD76715D7382D182A21A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest expense on debt instruments issued</link:label>
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    <link:label id="lab_ifrs-full_CapitalisationRateOfBorrowingCostsEligibleForCapitalisation_B455A7A94AD48851D0B87382D1828178_terseLabel_en-US" xlink:label="lab_ifrs-full_CapitalisationRateOfBorrowingCostsEligibleForCapitalisation_B455A7A94AD48851D0B87382D1828178" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capitalization rate</link:label>
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    <link:label id="lab_ifrs-full_CategoriesOfFinancialAssetsAxis_0B4B37BB6FCA965A0CD158359F7273D3_terseLabel_en-US" xlink:label="lab_ifrs-full_CategoriesOfFinancialAssetsAxis_0B4B37BB6FCA965A0CD158359F7273D3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Categories of financial assets [axis]</link:label>
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    <link:label id="lab_ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember_802ABC4EC4E4B976BC5A58359F7338A3_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember_802ABC4EC4E4B976BC5A58359F7338A3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">At Fair Value through Profit and loss</link:label>
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    <link:label id="lab_cstm_CashandCashEquivalentsMember_FB34DCC5F84B13057ADE58359F7479D4_terseLabel_en-US" xlink:label="lab_cstm_CashandCashEquivalentsMember_FB34DCC5F84B13057ADE58359F7479D4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
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    <link:label id="lab_ifrs-full_TradeReceivablesMember_ACDA50BC51A22F513F5358359F74C7A1_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeReceivablesMember_ACDA50BC51A22F513F5358359F74C7A1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trade receivables</link:label>
    <link:label id="lab_ifrs-full_TradeReceivablesMember_ACDA50BC51A22F513F5358359F74C7A1_label_en-US" xlink:label="lab_ifrs-full_TradeReceivablesMember_ACDA50BC51A22F513F5358359F74C7A1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trade receivables [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeReceivablesMember" xlink:label="loc_ifrs-full_TradeReceivablesMember_ACDA50BC51A22F513F5358359F74C7A1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TradeReceivablesMember_ACDA50BC51A22F513F5358359F74C7A1" xlink:to="lab_ifrs-full_TradeReceivablesMember_ACDA50BC51A22F513F5358359F74C7A1" xlink:type="arc" />
    <link:label id="lab_cstm_OtherFinancialAssetsMember_554D29BB4A8C23ED788C58359F747C5B_terseLabel_en-US" xlink:label="lab_cstm_OtherFinancialAssetsMember_554D29BB4A8C23ED788C58359F747C5B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other financial assets</link:label>
    <link:label id="lab_cstm_OtherFinancialAssetsMember_554D29BB4A8C23ED788C58359F747C5B_label_en-US" xlink:label="lab_cstm_OtherFinancialAssetsMember_554D29BB4A8C23ED788C58359F747C5B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Financial Assets [Member]</link:label>
    <link:label id="lab_cstm_OtherFinancialAssetsMember_554D29BB4A8C23ED788C58359F747C5B_documentation_en-US" xlink:label="lab_cstm_OtherFinancialAssetsMember_554D29BB4A8C23ED788C58359F747C5B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Financial Assets</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_OtherFinancialAssetsMember" xlink:label="loc_cstm_OtherFinancialAssetsMember_554D29BB4A8C23ED788C58359F747C5B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_OtherFinancialAssetsMember_554D29BB4A8C23ED788C58359F747C5B" xlink:to="lab_cstm_OtherFinancialAssetsMember_554D29BB4A8C23ED788C58359F747C5B" xlink:type="arc" />
    <link:label id="lab_ifrs-full_CategoriesOfFinancialLiabilitiesAxis_145105F097A3DAD54D3658359F74DF11_terseLabel_en-US" xlink:label="lab_ifrs-full_CategoriesOfFinancialLiabilitiesAxis_145105F097A3DAD54D3658359F74DF11" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Categories of financial liabilities [axis]</link:label>
    <link:label id="lab_ifrs-full_CategoriesOfFinancialLiabilitiesAxis_145105F097A3DAD54D3658359F74DF11_label_en-US" xlink:label="lab_ifrs-full_CategoriesOfFinancialLiabilitiesAxis_145105F097A3DAD54D3658359F74DF11" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Categories of financial liabilities [axis]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:label="loc_ifrs-full_CategoriesOfFinancialLiabilitiesAxis_145105F097A3DAD54D3658359F74DF11" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CategoriesOfFinancialLiabilitiesAxis_145105F097A3DAD54D3658359F74DF11" xlink:to="lab_ifrs-full_CategoriesOfFinancialLiabilitiesAxis_145105F097A3DAD54D3658359F74DF11" xlink:type="arc" />
    <link:label id="lab_ifrs-full_FinancialLiabilitiesCategoryMember_CA7B4E7665C1D3BE972458359F742BA2_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesCategoryMember_CA7B4E7665C1D3BE972458359F742BA2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial liabilities, category [member]</link:label>
    <link:label id="lab_ifrs-full_FinancialLiabilitiesCategoryMember_CA7B4E7665C1D3BE972458359F742BA2_label_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesCategoryMember_CA7B4E7665C1D3BE972458359F742BA2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial liabilities, category [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialLiabilitiesCategoryMember" xlink:label="loc_ifrs-full_FinancialLiabilitiesCategoryMember_CA7B4E7665C1D3BE972458359F742BA2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinancialLiabilitiesCategoryMember_CA7B4E7665C1D3BE972458359F742BA2" xlink:to="lab_ifrs-full_FinancialLiabilitiesCategoryMember_CA7B4E7665C1D3BE972458359F742BA2" xlink:type="arc" />
    <link:label id="lab_ifrs-full_FinancialLiabilitiesAtAmortisedCostMember_BF8D0CD32354649BAFA958359F755DDB_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesAtAmortisedCostMember_BF8D0CD32354649BAFA958359F755DDB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">At amortized cost</link:label>
    <link:label id="lab_ifrs-full_FinancialLiabilitiesAtAmortisedCostMember_BF8D0CD32354649BAFA958359F755DDB_label_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesAtAmortisedCostMember_BF8D0CD32354649BAFA958359F755DDB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial liabilities at amortised cost, class [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialLiabilitiesAtAmortisedCostMember" xlink:label="loc_ifrs-full_FinancialLiabilitiesAtAmortisedCostMember_BF8D0CD32354649BAFA958359F755DDB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinancialLiabilitiesAtAmortisedCostMember_BF8D0CD32354649BAFA958359F755DDB" xlink:to="lab_ifrs-full_FinancialLiabilitiesAtAmortisedCostMember_BF8D0CD32354649BAFA958359F755DDB" xlink:type="arc" />
    <link:label id="lab_ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember_136ED7EAAF88696C8FA658359F759F1F_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember_136ED7EAAF88696C8FA658359F759F1F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">At Fair Value through Profit and loss</link:label>
    <link:label id="lab_ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember_136ED7EAAF88696C8FA658359F759F1F_label_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember_136ED7EAAF88696C8FA658359F759F1F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial liabilities at fair value through profit or loss, category [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" xlink:label="loc_ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember_136ED7EAAF88696C8FA658359F759F1F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember_136ED7EAAF88696C8FA658359F759F1F" xlink:to="lab_ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember_136ED7EAAF88696C8FA658359F759F1F" xlink:type="arc" />
    <link:label id="lab_cstm_FinancialLiabilitiesAtFairValueThroughOtherComprehensiveIncomeCategoryMember_70E6AF48306ACD22D01F58359F75C683_terseLabel_en-US" xlink:label="lab_cstm_FinancialLiabilitiesAtFairValueThroughOtherComprehensiveIncomeCategoryMember_70E6AF48306ACD22D01F58359F75C683" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">At Fair Value through OCI</link:label>
    <link:label id="lab_cstm_FinancialLiabilitiesAtFairValueThroughOtherComprehensiveIncomeCategoryMember_70E6AF48306ACD22D01F58359F75C683_label_en-US" xlink:label="lab_cstm_FinancialLiabilitiesAtFairValueThroughOtherComprehensiveIncomeCategoryMember_70E6AF48306ACD22D01F58359F75C683" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Liabilities At Fair Value Through Other Comprehensive Income Category [Member]</link:label>
    <link:label id="lab_cstm_FinancialLiabilitiesAtFairValueThroughOtherComprehensiveIncomeCategoryMember_70E6AF48306ACD22D01F58359F75C683_documentation_en-US" xlink:label="lab_cstm_FinancialLiabilitiesAtFairValueThroughOtherComprehensiveIncomeCategoryMember_70E6AF48306ACD22D01F58359F75C683" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Financial Liabilities At Fair Value Through Other Comprehensive Income Category</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_FinancialLiabilitiesAtFairValueThroughOtherComprehensiveIncomeCategoryMember" xlink:label="loc_cstm_FinancialLiabilitiesAtFairValueThroughOtherComprehensiveIncomeCategoryMember_70E6AF48306ACD22D01F58359F75C683" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_FinancialLiabilitiesAtFairValueThroughOtherComprehensiveIncomeCategoryMember_70E6AF48306ACD22D01F58359F75C683" xlink:to="lab_cstm_FinancialLiabilitiesAtFairValueThroughOtherComprehensiveIncomeCategoryMember_70E6AF48306ACD22D01F58359F75C683" xlink:type="arc" />
    <link:label id="lab_ifrs-full_ClassesOfFinancialLiabilitiesAxis_D0CF814DA566B22FC61D58359F75BFC3_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfFinancialLiabilitiesAxis_D0CF814DA566B22FC61D58359F75BFC3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Classes of financial liabilities [axis]</link:label>
    <link:label id="lab_ifrs-full_ClassesOfFinancialLiabilitiesAxis_D0CF814DA566B22FC61D58359F75BFC3_label_en-US" xlink:label="lab_ifrs-full_ClassesOfFinancialLiabilitiesAxis_D0CF814DA566B22FC61D58359F75BFC3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Classes of financial liabilities [axis]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:label="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_D0CF814DA566B22FC61D58359F75BFC3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_D0CF814DA566B22FC61D58359F75BFC3" xlink:to="lab_ifrs-full_ClassesOfFinancialLiabilitiesAxis_D0CF814DA566B22FC61D58359F75BFC3" xlink:type="arc" />
    <link:label id="lab_ifrs-full_FinancialLiabilitiesMember_C04731B488BB914F796A58359F754C4E_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesMember_C04731B488BB914F796A58359F754C4E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial liabilities, class [member]</link:label>
    <link:label id="lab_ifrs-full_FinancialLiabilitiesMember_C04731B488BB914F796A58359F754C4E_label_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesMember_C04731B488BB914F796A58359F754C4E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial liabilities, class [member]</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialLiabilitiesMember" xlink:label="loc_ifrs-full_FinancialLiabilitiesMember_C04731B488BB914F796A58359F754C4E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinancialLiabilitiesMember_C04731B488BB914F796A58359F754C4E" xlink:to="lab_ifrs-full_FinancialLiabilitiesMember_C04731B488BB914F796A58359F754C4E" xlink:type="arc" />
    <link:label id="lab_cstm_TradePayablesMember_F048DE3F8ADA58644C1358359F762D64_verboseLabel_en-US" xlink:label="lab_cstm_TradePayablesMember_F048DE3F8ADA58644C1358359F762D64" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Trade payables and fixed assets payables</link:label>
    <link:label id="lab_cstm_TradePayablesMember_F048DE3F8ADA58644C1358359F762D64_label_en-US" xlink:label="lab_cstm_TradePayablesMember_F048DE3F8ADA58644C1358359F762D64" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trade Payables [member]</link:label>
    <link:label id="lab_cstm_TradePayablesMember_F048DE3F8ADA58644C1358359F762D64_documentation_en-US" xlink:label="lab_cstm_TradePayablesMember_F048DE3F8ADA58644C1358359F762D64" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Trade payables.</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_TradePayablesMember" xlink:label="loc_cstm_TradePayablesMember_F048DE3F8ADA58644C1358359F762D64" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_TradePayablesMember_F048DE3F8ADA58644C1358359F762D64" xlink:to="lab_cstm_TradePayablesMember_F048DE3F8ADA58644C1358359F762D64" xlink:type="arc" />
    <link:label id="lab_cstm_Borrowings1Member_AB92197A9DEA5CEB4C3858359F7675CD_terseLabel_en-US" xlink:label="lab_cstm_Borrowings1Member_AB92197A9DEA5CEB4C3858359F7675CD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Borrowings</link:label>
    <link:label id="lab_cstm_Borrowings1Member_AB92197A9DEA5CEB4C3858359F7675CD_label_en-US" xlink:label="lab_cstm_Borrowings1Member_AB92197A9DEA5CEB4C3858359F7675CD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Borrowings 1 [member]</link:label>
    <link:label id="lab_cstm_Borrowings1Member_AB92197A9DEA5CEB4C3858359F7675CD_documentation_en-US" xlink:label="lab_cstm_Borrowings1Member_AB92197A9DEA5CEB4C3858359F7675CD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Borrowings.</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_Borrowings1Member" xlink:label="loc_cstm_Borrowings1Member_AB92197A9DEA5CEB4C3858359F7675CD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_Borrowings1Member_AB92197A9DEA5CEB4C3858359F7675CD" xlink:to="lab_cstm_Borrowings1Member_AB92197A9DEA5CEB4C3858359F7675CD" xlink:type="arc" />
    <link:label id="lab_cstm_OtherFinancialLiabilitiesMember_69930D30629B22B09BFA58359F76D1E6_terseLabel_en-US" xlink:label="lab_cstm_OtherFinancialLiabilitiesMember_69930D30629B22B09BFA58359F76D1E6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other financial liabilities</link:label>
    <link:label id="lab_cstm_OtherFinancialLiabilitiesMember_69930D30629B22B09BFA58359F76D1E6_label_en-US" xlink:label="lab_cstm_OtherFinancialLiabilitiesMember_69930D30629B22B09BFA58359F76D1E6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Financial Liabilities [Member]</link:label>
    <link:label id="lab_cstm_OtherFinancialLiabilitiesMember_69930D30629B22B09BFA58359F76D1E6_documentation_en-US" xlink:label="lab_cstm_OtherFinancialLiabilitiesMember_69930D30629B22B09BFA58359F76D1E6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Financial Liabilities</link:label>
    <link:loc xlink:href="cstm-20200630.xsd#cstm_OtherFinancialLiabilitiesMember" xlink:label="loc_cstm_OtherFinancialLiabilitiesMember_69930D30629B22B09BFA58359F76D1E6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cstm_OtherFinancialLiabilitiesMember_69930D30629B22B09BFA58359F76D1E6" xlink:to="lab_cstm_OtherFinancialLiabilitiesMember_69930D30629B22B09BFA58359F76D1E6" xlink:type="arc" />
    <link:label id="lab_ifrs-full_FinancialAssets_1398175A6BC6BD115DF258359F765740_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialAssets_1398175A6BC6BD115DF258359F765740" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial assets</link:label>
    <link:label id="lab_ifrs-full_FinancialAssets_1398175A6BC6BD115DF258359F765740_label_en-US" xlink:label="lab_ifrs-full_FinancialAssets_1398175A6BC6BD115DF258359F765740" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial assets</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssets" xlink:label="loc_ifrs-full_FinancialAssets_1398175A6BC6BD115DF258359F765740" xlink:type="locator" />
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    <link:label id="lab_ifrs-full_FinancialLiabilities_AA86643C93C1F7BDF38358359F7756C4_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilities_AA86643C93C1F7BDF38358359F7756C4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial liabilities</link:label>
    <link:label id="lab_ifrs-full_FinancialLiabilities_AA86643C93C1F7BDF38358359F7756C4_label_en-US" xlink:label="lab_ifrs-full_FinancialLiabilities_AA86643C93C1F7BDF38358359F7756C4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial liabilities</link:label>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialLiabilities" xlink:label="loc_ifrs-full_FinancialLiabilities_AA86643C93C1F7BDF38358359F7756C4" xlink:type="locator" />
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    <link:loc xlink:href="cstm-20200630.xsd#cstm_OtherFutureContractMember" xlink:label="loc_cstm_OtherFutureContractMember_83D656ADC94FD25F7B0C58359F57CBE8" xlink:type="locator" />
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