    <SEC-DOCUMENT>0001292814-19-002588-index.html : 20190731
    <SEC-HEADER>0001292814-19-002588.hdr.sgml : 20190731
    <ACCEPTANCE-DATETIME>20190730182443
    ACCESSION NUMBER:		0001292814-19-002588
    CONFORMED SUBMISSION TYPE:	6-K
    PUBLIC DOCUMENT COUNT:		17
    CONFORMED PERIOD OF REPORT:	20190630
    FILED AS OF DATE:		20190731
    DATE AS OF CHANGE:		20190730

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			NATIONAL STEEL CO
    		CENTRAL INDEX KEY:			0001049659
    		STANDARD INDUSTRIAL CLASSIFICATION:	STEEL WORKS, BLAST FURNACES & ROLLING & FINISHING MILLS [3310]
    		IRS NUMBER:				000000000
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		6-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-14732
    		FILM NUMBER:		19986807

    	BUSINESS ADDRESS:
    		STREET 1:		RUA LAURO MULLER
    		STREET 2:		116 36 ANDAR
    		CITY:			RIO DE JANEIRO RJ BR
    		STATE:			D5
    		ZIP:			00000
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>6-K
    <SEQUENCE>1
    <FILENAME>sidpr2q19_6k.htm
    <DESCRIPTION>EARNINGS RELEASE 2Q19
    <TEXT>
    Document 1 - file: sidpr2q19_6k.htm

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    <SEQUENCE>2
    <FILENAME>sidpr2q19_6kx10x1.jpg
    <TEXT>
    Document 2 - file: sidpr2q19_6kx10x1.jpg

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    <SEQUENCE>3
    <FILENAME>sidpr2q19_6kx11x1.jpg
    <TEXT>
    Document 3 - file: sidpr2q19_6kx11x1.jpg

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    <SEQUENCE>4
    <FILENAME>sidpr2q19_6kx12x1.jpg
    <TEXT>
    Document 4 - file: sidpr2q19_6kx12x1.jpg

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    <DOCUMENT>
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    <SEQUENCE>5
    <FILENAME>sidpr2q19_6kx13x1.jpg
    <TEXT>
    Document 5 - file: sidpr2q19_6kx13x1.jpg

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    <SEQUENCE>6
    <FILENAME>sidpr2q19_6kx14x1.jpg
    <TEXT>
    Document 6 - file: sidpr2q19_6kx14x1.jpg

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    <SEQUENCE>7
    <FILENAME>sidpr2q19_6kx15x1.jpg
    <TEXT>
    Document 7 - file: sidpr2q19_6kx15x1.jpg

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    <SEQUENCE>8
    <FILENAME>sidpr2q19_6kx16x1.jpg
    <TEXT>
    Document 8 - file: sidpr2q19_6kx16x1.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>sidpr2q19_6kx1x1.jpg
    <TEXT>
    Document 9 - file: sidpr2q19_6kx1x1.jpg

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    <SEQUENCE>10
    <FILENAME>sidpr2q19_6kx2x1.jpg
    <TEXT>
    Document 10 - file: sidpr2q19_6kx2x1.jpg

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    <SEQUENCE>11
    <FILENAME>sidpr2q19_6kx3x1.jpg
    <TEXT>
    Document 11 - file: sidpr2q19_6kx3x1.jpg

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    <SEQUENCE>12
    <FILENAME>sidpr2q19_6kx4x1.jpg
    <TEXT>
    Document 12 - file: sidpr2q19_6kx4x1.jpg

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    <SEQUENCE>13
    <FILENAME>sidpr2q19_6kx5x1.jpg
    <TEXT>
    Document 13 - file: sidpr2q19_6kx5x1.jpg

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    <SEQUENCE>14
    <FILENAME>sidpr2q19_6kx6x1.jpg
    <TEXT>
    Document 14 - file: sidpr2q19_6kx6x1.jpg

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    <SEQUENCE>15
    <FILENAME>sidpr2q19_6kx7x1.jpg
    <TEXT>
    Document 15 - file: sidpr2q19_6kx7x1.jpg

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    <SEQUENCE>16
    <FILENAME>sidpr2q19_6kx8x1.jpg
    <TEXT>
    Document 16 - file: sidpr2q19_6kx8x1.jpg

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    <SEQUENCE>17
    <FILENAME>sidpr2q19_6kx9x1.jpg
    <TEXT>
    Document 17 - file: sidpr2q19_6kx9x1.jpg

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