<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>
<DOCUMENT>
<TYPE>6-K
<SEQUENCE>1
<FILENAME>sidpr1q17_6k.htm
<DESCRIPTION>PR 1Q17
<TEXT>
Document 1 - file: sidpr1q17_6k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>csn_er1t17englfinal-gtx6x1.jpg
<TEXT>
Document 2 - file: csn_er1t17englfinal-gtx6x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>pg1b.jpg
<TEXT>
Document 3 - file: pg1b.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>sidpr1q17_6kx10x1.jpg
<TEXT>
Document 4 - file: sidpr1q17_6kx10x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>sidpr1q17_6kx1x5.jpg
<TEXT>
Document 5 - file: sidpr1q17_6kx1x5.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>sidpr1q17_6kx2x1.jpg
<TEXT>
Document 6 - file: sidpr1q17_6kx2x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>sidpr1q17_6kx3x1.jpg
<TEXT>
Document 7 - file: sidpr1q17_6kx3x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>sidpr1q17_6kx4x1.jpg
<TEXT>
Document 8 - file: sidpr1q17_6kx4x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>sidpr1q17_6kx6x2.jpg
<TEXT>
Document 9 - file: sidpr1q17_6kx6x2.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>sidpr1q17_6kx7x1.jpg
<TEXT>
Document 10 - file: sidpr1q17_6kx7x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>sidpr1q17_6kx8x1.jpg
<TEXT>
Document 11 - file: sidpr1q17_6kx8x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>sidpr1q17_6kx9x1.jpg
<TEXT>
Document 12 - file: sidpr1q17_6kx9x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>sidpr1q17_6kx9x2.jpg
<TEXT>
Document 13 - file: sidpr1q17_6kx9x2.jpg

</DOCUMENT>
</SEC-DOCUMENT>