October 21, 2008

CSN – Notice to the Market – NAMISA

RIO DE JANEIRO, Brazil, Oct. 21 /PRNewswire-FirstCall/ -- COMPANHIA SIDERURGICA NACIONAL - CSN (NYSE: SID; BOVESPA: CSNA3) hereby informs its shareholders and market participants, complementing the relevant fact published on October 17, 2008, that today it finalized negotiation and signed the relevant agreements, for the establishment of a strategic partnership with a consortium comprised of ITOCHU Corporation, Nippon Steel Corporation, JFE Steel Corporation, POSCO, Sumitomo Metal Industries, Ltd., Kobe Steel, Ltd., and Nisshin Steel Co, Ltd. (the "Consortium").

1. The transaction consists of the sale of 40% of the voting and total capital stock of Nacional Minerios S.A. ("NAMISA"), a subsidiary of CSN, for the aggregate amount of US$3.12 billion, payable in cash on the closing date. The closing date is expected to occur by the end of November 2008. Out of the US$3.12 billion amount, the Consortium will pay approximately US$3 billion in connection with the acquisition of a primary issue of shares by NAMISA.

2. NAMISA will pay approximately US$3 billion to CSN on the closing date as pre-payment for a portion of the purchase price agreed between the parties in connection with future sales of crude iron ore (run of mine) and the rendering of port services from CSN to NAMISA. The run of mine will be extracted by CSN from the Casa de Pedra Mine and will be sold to NAMISA, which shall, in addition to its own run of mine, benefit the product in NAMISA's own industrial facilities. All agreements were negotiated on an arms-length basis.

3. CSN will maintain 60% of Namisa's voting and total capital with a view to aligning the parties' interest in this long-term venture.

4. NAMISA's operation is fully integrated and includes access to rail transportation in the form of long-term contract with MRS Logistica S.A. ("MRS"). As part of the transaction, CSN will contribute non-voting non- convertible class A preferred shares of MRS to NAMISA. These shares correspond to approximately 10% of MRS's total capital.

5. NAMISA's business plan provides for an aggressive production expansion of iron ore products and pellets. NAMISA will market mainly iron ore of its own production but will also acquire iron ore from third parties producers to complement its sales.

6. A portion of NAMISA's production will be sold to the Consortium members. Such obligations are reflected in a long-term "offtake" agreement and were established on an arms-length basis.

7. NAMISA's mid- and long-term business plans estimate that in 2009 the company will have sales of approximately 18 million tons of iron ore per year. It also provides for an expansion in production in order to allow NAMISA to commercialize an estimated amount in excess of 38 million tons of iron ore per year from 2013 onwards.

8. CSN would like to clarify that the transaction does not provide for the acquisition by the Consortium of a stake in the Casa de Pedra Mine.

   Investor Relations Companhia Siderurgica Nacional   Phone: 55 11 3049-7588   E-mail: [email protected]   http://www.csn.com.br/ir  

Companhia Siderurgica Nacional

CONTACT: Investor Relations, Companhia Siderurgica Nacional,+011-5511-3049-7588, [email protected]