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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001292814-07-000158.txt : 20070130
<SEC-HEADER>0001292814-07-000158.hdr.sgml : 20070130
<ACCEPTANCE-DATETIME>20070129203813
ACCESSION NUMBER:		0001292814-07-000158
CONFORMED SUBMISSION TYPE:	6-K
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070331
FILED AS OF DATE:		20070130
DATE AS OF CHANGE:		20070129

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:		07562746

	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>sid20070129_6k1.htm
<DESCRIPTION>MATERIAL FACT - RELEVANT NOTICE
<TEXT>


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<HR SIZE="4" NOSHADE COLOR="#000000" ALIGN="left">
<DIV><FONT SIZE="1">&nbsp;</FONT></DIV>
<DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="5" COLOR="#000000"><B>SECURITIES AND EXCHANGE COMMISSION </B></FONT></DIV>
<DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="3" COLOR="#000000"><B>Washington, D.C. 20549 </B></FONT></DIV>
<DIV><FONT SIZE="1">&nbsp;</FONT></DIV>
<HR align=center NOSHADE WIDTH="21%" COLOR="#000000">
<DIV><FONT SIZE="1">&nbsp;</FONT></DIV>
<DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="5" COLOR="#000000"><B>FORM 6-K </B></FONT></DIV>
<DIV><FONT
SIZE="1">&nbsp;</FONT></DIV>
<DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="3"
COLOR="#000000">Report of Foreign Private Issuer<BR>
  Pursuant to Rule 13a-16 or 15d-16 of the</FONT></DIV>
<DIV
ALIGN="center"><FONT FACE="Times New Roman" SIZE="3" COLOR="#000000">Securities Exchange Act of 1934</FONT></DIV>
<DIV><FONT SIZE="1">&nbsp;</FONT></DIV>
<DIV ALIGN="center">
  <div><FONT FACE="Times New Roman" SIZE="3" COLOR="#000000"><B> For the month of January, 2007</B></FONT></DIV>
  <p></p>
  <FONT FACE="Times New Roman" SIZE="3" COLOR="#000000"><B> Commission File Number 1-14732 </B></FONT></DIV>
<DIV><FONT SIZE="1">&nbsp;</FONT></DIV>
<HR align=center NOSHADE WIDTH="21%" COLOR="#000000">
<DIV><FONT
SIZE="1">&nbsp;</FONT></DIV>
<DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="5" COLOR="#000000"><B> COMPANHIA SIDER&#218;RGICA NACIONAL </B></FONT></DIV>
<DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">(Exact name of registrant as specified in its charter) </FONT></DIV>
<DIV><FONT SIZE="1">&nbsp;</FONT></DIV>
<DIV ALIGN="center"> </DIV>
<P></P>
<DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="5" COLOR="#000000"><B> National Steel Company </B></FONT></DIV>
<DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">(Translation of Registrant's name into English)</FONT></DIV>
<DIV><FONT SIZE="1">&nbsp;</FONT></DIV>
<P></P>
<DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="3" COLOR="#000000"><B> Av. Brigadeiro Faria Lima 3400, 20&#186; andar<BR>
  S&#227;o Paulo, SP, Brazil<BR>
  04538-132 </B></FONT></DIV>
<DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">(Address of principal executive office)</FONT></DIV>
<DIV><FONT SIZE="1">&nbsp;</FONT></DIV>
<P>
<DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="3" COLOR="#000000"> Indicate by check mark whether the registrant files or will file annual reports<BR>
  under cover Form 20-F or Form 40-F.&nbsp;</FONT>
    <P></P>
    Form 20-F ___X___ Form 40-F _______
    <P>&nbsp;<FONT FACE="Times New Roman, Times, Serif" SIZE=3>Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934. </FONT>&nbsp;</P>
    Yes _______ No ___X____
    <p></p>
</DIV>
<HR SIZE="2" NOSHADE COLOR="#000000" ALIGN="left">

<H5 align="left" style="page-break-before:always"></H5>





<P align="center">
<b>Material Fact &#150; Relevant Notice </b><br>
COMPANHIA SIDER&Uacute;RGICA NACIONAL<br>
Rua S&atilde;o Jos&eacute;, 20 - Grupo 1602, parte <br>
Rio de Janeiro/RJ<br>
Corporate Taxpayer&#146;s ID (CNPJ): 33.042.730/0001 -04</P>
<P>
On this present date, the Board of Directors of COMPANHIA SIDER&Uacute;RGICA NACIONAL authorized the acquisition of shares issued by the Company, to be held in treasury for subsequent sale or cancellation.</P>
<P>
Pursuant to CVM Instruction 10/80, the acquisition shall observe the following limits and conditions:</P>
<TABLE border=0 width=100% cellspacing=0 cellpadding=0 style="font-family:'Times New Roman, Times, Serif'; font-size:11px">
<TR>
	<TD></TD>
	<TD></TD></TR>
<TR valign="bottom">
	<TD width="5%" align=left valign="top"><b>I-&nbsp;</b></TD>
	<TD align=left><b>Purpose of the Operation: </b>to maximize value generation for CSN&#146;s shareholders&nbsp;through efficient management of the Company&#146;s capital structure.&nbsp;</TD></TR>
<TR valign="bottom">
  <TD align=left valign="top">&nbsp;</TD>
  <TD align=left>&nbsp;</TD>
</TR>
<TR valign="bottom">
	<TD align=left valign="top"><b>II -&nbsp;</b></TD>
	<TD align=left><b>Amount of Shares to be Acquired:</b> up to 923,628.&nbsp;</TD></TR>
<TR valign="bottom">
  <TD align=left valign="top">&nbsp;</TD>
  <TD align=left>&nbsp;</TD>
</TR>
<TR valign="bottom">
	<TD align=left valign="top"><b>III -&nbsp;</b></TD>
	<TD align=left><b>Deadline for the Operation:</b> January 25, 2008.&nbsp;</TD></TR>
<TR valign="bottom">
  <TD align=left valign="top">&nbsp;</TD>
  <TD align=left>&nbsp;</TD>
</TR>
<TR valign="bottom">
	<TD align=left valign="top"><b>IV -&nbsp;</b></TD>
	<TD align=left><b>Amount of Outstanding Shares:</b> 155,781,281.&nbsp;</TD></TR>
<TR valign="bottom">
  <TD align=left valign="top">&nbsp;</TD>
  <TD align=left>&nbsp;</TD>
</TR>
<TR valign="bottom">
	<TD align=left valign="top"><b>V -&nbsp;</b></TD>
	<TD align=left><b>Venue for the Acquisitions:</b> S&atilde;o Paulo Stock Exchange &#150; BOVESPA.&nbsp;</TD></TR>
<TR valign="bottom">
  <TD align=left valign="top">&nbsp;</TD>
  <TD align=left>&nbsp;</TD>
</TR>
<TR valign="bottom">
	<TD align=left valign="top"><b>VI -&nbsp;</b></TD>
	<TD align=left><b>Shares&#146; Maximum Price:</b> the acquisition price shall not exceed the respective&nbsp;quotation on the Stock Exchange.&nbsp;</TD></TR>
<TR valign="bottom">
  <TD align=left valign="top">&nbsp;</TD>
  <TD align=left>&nbsp;</TD>
</TR>
<TR valign="bottom">
	<TD align=left valign="top"><b>VII -&nbsp;</b></TD>
	<TD align=left><b>Underwriters:</b> Ita&uacute; Corretora de Valores S.A., Pactual CTVM S.A. and Credit&nbsp;Suisse First Boston CTVM S.A.&nbsp;</TD></TR>
</TABLE>
<BR>
<P align="center">
Rio de Janeiro, January 29, 2007</P>
<P align="center"><b>Companhia Sider&uacute;rgica Nacional </b><br>
Benjamin Steinbruch <br>
Investor Relations Executive Officer </P>






<H5 align="left" style="page-break-before:always"></H5>
<HR SIZE="2" NOSHADE COLOR="#000000" ALIGN="left">

<p><FONT SIZE="1">&nbsp;</FONT></p>
<DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="3" COLOR="#000000"><B>SIGNATURE </B></FONT></DIV>
<DIV><FONT SIZE="1">&nbsp;</FONT></DIV>
<DIV><FONT SIZE="1">&nbsp;</FONT></DIV>
<DIV STYLE="text-indent:4%"><FONT FACE="Times New Roman" SIZE="3"COLOR="#000000">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. </FONT></DIV>
<p></p>
<DIV STYLE="text-indent:4%"><FONT FACE="Times New Roman" SIZE="3" COLOR="#000000"> Date: January 29, 2007</FONT></DIV>
<p></p>
<DIV><FONT SIZE="1">&nbsp;</FONT></DIV>
<DIV ALIGN="center">
  <TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="50%" BORDER="0">
    <TR>
      <TD VALIGN="top" COLSPAN="3" WIDTH="50%"><DIV align=left><FONT FACE="Times New Roman" SIZE="3" COLOR="#000000"> COMPANHIA SIDER&#218;RGICA NACIONAL </FONT></DIV></TD>
    </TR>
    <TR>
      <TD HEIGHT="16"></TD>
    </TR>
    <TR>
      <TD VALIGN="top" WIDTH="5%"><DIV align=left><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">By:</FONT></DIV></TD>
      <TD VALIGN="bottom" ALIGN="center" WIDTH="43%"><DIV ALIGN="center"><FONT
FACE="Times New Roman" SIZE="2" COLOR="#000000">/<SMALL>S</SMALL>/&nbsp;Benjamin Steinbruch </FONT></DIV>
          <HR NOSHADE SIZE=1 COLOR="#000000" ALIGN="left"></TD>
    </TR>
    <TR>
      <TD><FONT SIZE="1">&nbsp;</FONT></TD>
      <TD VALIGN="bottom" ALIGN="center" WIDTH="43%"><DIV ALIGN=left><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"><B> Benjamin Steinbruch </B></FONT></DIV>
          <DIV ALIGN=left><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"><B> Chief Executive Officer and <br>
          Acting Chief Financial Officer <br>
        </B></FONT></DIV></TD>
    </TR>
  </TABLE>
</DIV>
<DIV><FONT SIZE="1">&nbsp;</FONT></DIV>
<P>&nbsp;</P>
<P></P>
<DIV><FONT SIZE="1">&nbsp;</FONT></DIV>
<DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="3"
COLOR="#000000"><B>FORWARD-LOOKING STATEMENTS </B></FONT></DIV>
<P align=justify><FONT FACE="Times New Roman, Times, Serif" SIZE=2> This press release may contain forward-looking statements. These statements are statements that are not historical facts, and are based on management's current view and estimates of future economic circumstances, industry conditions, company performance and financial results. The words "anticipates", "believes", "estimates", "expects", "plans" and similar expressions, as they relate to the company, are intended to identify forward-looking statements. Statements regarding the declaration or payment of dividends, the implementation of principal operating and financing strategies and capital expenditure plans, the direction of future operations and the factors or trends affecting financial condition, liquidity or results of operations are examples of forward-looking statements. Such statements reflect the current views of management and are subject to a number of risks and uncertainties. There is no guarantee that the expected events, trends or






 results will actually occur. The statements are based on many assumptions and factors, including general economic and market conditions, industry conditions, and operating factors. Any changes in such assumptions or factors could cause actual results to differ materially from current expectations. </FONT></P>
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