<SEC-DOCUMENT>0001123292-21-001128.txt : 20210712
<SEC-HEADER>0001123292-21-001128.hdr.sgml : 20210712
<ACCEPTANCE-DATETIME>20210712163307
ACCESSION NUMBER:		0001123292-21-001128
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20210701
FILED AS OF DATE:		20210712
DATE AS OF CHANGE:		20210712

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Mollins Sean Michael
		CENTRAL INDEX KEY:			0001871348

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13122
		FILM NUMBER:		211085879

	MAIL ADDRESS:	
		STREET 1:		350 SOUTH GRAND AVENUE, SUITE 5100
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90071

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			RELIANCE STEEL & ALUMINUM CO
		CENTRAL INDEX KEY:			0000861884
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-METALS SERVICE CENTERS & OFFICES [5051]
		IRS NUMBER:				951142616
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		350 S GRAND AVE STE 5100
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90071
		BUSINESS PHONE:		213-687-7700

	MAIL ADDRESS:	
		STREET 1:		350 S GRAND AVE STE 5100
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90071
</SEC-HEADER>
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<SEQUENCE>1
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<DESCRIPTION>PRIMARY DOCUMENT
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    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2021-07-01</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000861884</issuerCik>
        <issuerName>RELIANCE STEEL &amp; ALUMINUM CO</issuerName>
        <issuerTradingSymbol>RS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001871348</rptOwnerCik>
            <rptOwnerName>Mollins Sean Michael</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>350 SOUTH GRAND AVENUE, SUITE 5100</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90071</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP, Operations</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>15850</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2855</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held by Trustee of Reliance Steel &amp; Aluminum Co. 401(k) Plan</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>201</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held by Trustee of Reliance Steel &amp; Aluminum Co. Employee Stock Ownership Plan</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <remarks>Exhibit 24 - Power of Attorney</remarks>

    <ownerSignature>
        <signatureName>/s/ Sean M. Mollins</signatureName>
        <signatureDate>2021-07-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
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<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
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<DESCRIPTION>EXHIBIT 24 - POWER OF ATTORNEY
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    <div style="text-align: center; line-height: 12.55pt; font-family: 'Times New Roman',Times,serif; font-size: 11pt; font-weight: bold;">SPECIAL POWER OF ATTORNEY</div>
    <div style="line-height: 12.55pt; font-family: 'Times New Roman',Times,serif; font-size: 11pt;">&#160;</div>
    <div style="text-indent: 36pt; line-height: 12.55pt; font-family: 'Times New Roman',Times,serif; font-size: 11pt;">The undersigned is an officer and/or director of Reliance Steel &amp; Aluminum&#160;Co., a Delaware corporation
      (&#8220;Reliance&#8221;), and hereby makes, constitutes and appoints each of Karla Lewis, President of Reliance, and William&#160;A. Smith&#160;II, Senior Vice President, General Counsel and Corporate Secretary of Reliance, or either of them, to act severally as
      attorney-in-fact and agent, with power of substitution and resubstitution for each of them in any and all capacities to:</div>
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            <div style="margin-left: 36pt; line-height: 12.55pt;">(1)</div>
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            <div style="line-height: 12.55pt; font-family: 'Times New Roman',Times,serif; font-size: 11pt;">prepare, execute in the undersigned&#8217;s name and on the undersigned&#8217;s behalf, and submit to the U.S. Securities and
              Exchange Commission (the &#8220;SEC&#8221;) a Form ID, including amendments thereto, and any other documents necessary or appropriate to obtain codes and passwords enabling the undersigned to make electronic filings with the SEC of reports required by
              Section 16(a) of the Securities Exchange Act of 1934, as amended (the &#8220;Act&#8221;) or any rule or regulation of the SEC;</div>
            <div style="line-height: 12.55pt; font-family: 'Times New Roman', serif; font-size: 11pt;"> <font style="font-family: 'Times New Roman',Times,serif;"><br>
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            <div style="margin-left: 36pt; line-height: 12.55pt;">(2)</div>
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            <div style="line-height: 12.55pt; font-family: 'Times New Roman',Times,serif; font-size: 11pt;">prepare and execute any Form&#160;3, 4 or 5 or any similar report, or any amendment thereof, for and on behalf of the
              undersigned, to report the undersigned's beneficial ownership of Reliance securities or any changes in such beneficial ownership of Reliance securities and to timely file any such report or amendment with the SEC and the New York Stock
              Exchange or any other appropriate regulatory agency, and the undersigned hereby ratifies and confirms all that said attorneys-in-fact, or substitute or substitutes, may do or cause to be done by virtue of this Special Power of Attorney; and</div>
            <div style="line-height: 12.55pt; font-family: 'Times New Roman', serif; font-size: 11pt;"> <font style="font-family: 'Times New Roman',Times,serif;"><br>
              </font></div>
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            <div style="margin-left: 36pt; line-height: 12.55pt;">(3)</div>
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            <div style="line-height: 12.55pt; font-family: 'Times New Roman',Times,serif; font-size: 11pt;">take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such
              attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Special Power of
              Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact&#8217;s discretion.</div>
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    <div style="text-indent: 36pt; line-height: 12.55pt; font-family: 'Times New Roman',Times,serif; font-size: 11pt;">The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request
      of the undersigned, are not assuming, nor is Reliance assuming, any of the undersigned&#8217;s responsibilities to comply with Section&#160;16 of the Act.</div>
    <div style="line-height: 12.55pt; font-family: 'Times New Roman',Times,serif; font-size: 11pt;">&#160;</div>
    <div style="text-indent: 36pt; line-height: 12.55pt; font-family: 'Times New Roman',Times,serif; font-size: 11pt;">This Special Power of Attorney shall remain in full force and effect until the undersigned is no longer
      required to file Forms&#160;3, 4, and 5 with respect to the undersigned&#8217;s holdings of and transactions in securities issued by Reliance, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.</div>
    <div style="line-height: 12.55pt; font-family: 'Times New Roman',Times,serif; font-size: 11pt;">&#160;</div>
    <div style="text-indent: 36pt; line-height: 12.55pt; font-family: 'Times New Roman',Times,serif; font-size: 11pt;">IN WITNESS WHEREOF, the undersigned has executed this Special Power of Attorney on July 7, 2021.</div>
    <div style="line-height: 12.55pt; font-family: 'Times New Roman',Times,serif; font-size: 11pt;">&#160;</div>
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    <div style="text-indent: 36pt; margin-left: 180pt; line-height: 12.55pt;"><font style="font-family: 'Times New Roman',Times,serif; font-size: 11pt;"><u>/s/ Sean M. Mollins &#160; &#160; &#160; &#160; &#160; &#160; &#160;</u></font><font style="text-indent: 0px; font-size: 11pt; font-family: 'Times New Roman',Times,serif;" id="TRGRRTFtoHTMLTab"> &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <br>
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    <div style="text-indent: 36pt; margin-left: 180pt; line-height: 12.55pt; font-family: 'Times New Roman', serif; font-size: 11pt;"><font style="font-family: 'Times New Roman',Times,serif;">Name:&#160; Sean M.
        Mollins&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <br>
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