    <SEC-DOCUMENT>0001292814-20-001339-index.html : 20200417
    <SEC-HEADER>0001292814-20-001339.hdr.sgml : 20200417
    <ACCEPTANCE-DATETIME>20200417172951
    ACCESSION NUMBER:		0001292814-20-001339
    CONFORMED SUBMISSION TYPE:	6-K
    PUBLIC DOCUMENT COUNT:		6
    CONFORMED PERIOD OF REPORT:	20191231
    FILED AS OF DATE:		20200417
    DATE AS OF CHANGE:		20200417

    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:		20800689

    	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>sidfs2019_6k.htm
    <DESCRIPTION>SIDFS2019_6K
    <TEXT>
    Document 1 - file: sidfs2019_6k.htm

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

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

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>tabela11.jpg
    <TEXT>
    Document 4 - file: tabela11.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>tabela13.jpg
    <TEXT>
    Document 5 - file: tabela13.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>tabela2.jpg
    <TEXT>
    Document 6 - file: tabela2.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>