    <SEC-DOCUMENT>0001292814-17-003428-index.html : 20171226
    <SEC-HEADER>0001292814-17-003428.hdr.sgml : 20171225
    <ACCEPTANCE-DATETIME>20171226061027
    ACCESSION NUMBER:		0001292814-17-003428
    CONFORMED SUBMISSION TYPE:	6-K
    PUBLIC DOCUMENT COUNT:		13
    CONFORMED PERIOD OF REPORT:	20170331
    FILED AS OF DATE:		20171226
    DATE AS OF CHANGE:		20171226

    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:		171273604

    	BUSINESS ADDRESS:
    		STREET 1:		RUA LAURO MULLER
    		STREET 2:		116 36 ANDAR
    		CITY:			RIO DE JANEIRO RJ BR
    		STATE:			D5
    		ZIP:			00000
    </SEC-HEADER>
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    <SEQUENCE>1
    <FILENAME>sidpr1q17_6k.htm
    <DESCRIPTION>PR 1Q17
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    Document 1 - file: sidpr1q17_6k.htm

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    Document 2 - file: csn_er1t17englfinal-gtx6x1.jpg

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    <FILENAME>pg1b.jpg
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    Document 3 - file: pg1b.jpg

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    <SEQUENCE>4
    <FILENAME>sidpr1q17_6kx10x1.jpg
    <TEXT>
    Document 4 - file: sidpr1q17_6kx10x1.jpg

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    <SEQUENCE>5
    <FILENAME>sidpr1q17_6kx1x5.jpg
    <TEXT>
    Document 5 - file: sidpr1q17_6kx1x5.jpg

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    Document 6 - file: sidpr1q17_6kx2x1.jpg

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    <FILENAME>sidpr1q17_6kx3x1.jpg
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    Document 7 - file: sidpr1q17_6kx3x1.jpg

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    <FILENAME>sidpr1q17_6kx4x1.jpg
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    Document 8 - file: sidpr1q17_6kx4x1.jpg

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    <SEQUENCE>9
    <FILENAME>sidpr1q17_6kx6x2.jpg
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    Document 9 - file: sidpr1q17_6kx6x2.jpg

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    <SEQUENCE>10
    <FILENAME>sidpr1q17_6kx7x1.jpg
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    Document 10 - file: sidpr1q17_6kx7x1.jpg

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    <FILENAME>sidpr1q17_6kx8x1.jpg
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    Document 11 - file: sidpr1q17_6kx8x1.jpg

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    <FILENAME>sidpr1q17_6kx9x1.jpg
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    Document 12 - file: sidpr1q17_6kx9x1.jpg

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    <SEQUENCE>13
    <FILENAME>sidpr1q17_6kx9x2.jpg
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    Document 13 - file: sidpr1q17_6kx9x2.jpg

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