Companhia Siderúrgica Nacional : Notice to the Market*

São Paulo, February 8, 2018 - Companhia Siderúrgica Nacional ("CSN") (NYSE: SID) announced today that its subsidiary, CSN Resources S.A., priced an offering of US$350 million in aggregate principal amount of 7.625% senior unsecured notes due 2023 (the "Notes"), in accordance with Rule 144A and Regulation S under the U.S. Securities Act of 1933, as amended (the "Securities Act"), expected to close on February 13, 2018. The Notes will be fully, unconditionally and irrevocably guaranteed by CSN.

CSN Resources S.A. expects to use the net proceeds from this offering to purchase, as part of two concurrent tender offers, (i) up to US$350 million in 6.875% senior unsecured guaranteed notes due 2019, or the 2019 Notes, and (ii) outstanding 6.50% senior unsecured guaranteed notes due 2020 in an amount not to exceed US$350 million less the aggregate principal amount of 2019 Notes validly tendered and accepted for purchase. The expected expiration date for the concurrent tender offers, which were announced on February 1, 2018, is February 26, 2018.

The Notes were offered and sold only to qualified institutional buyers in accordance with Rule 144A under the Securities Act and to non-U.S. persons in accordance with Regulation S under the Securities Act. When issued, the Notes will not have been registered under the Securities Act or state securities laws and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements of the Securities Act and applicable state securities laws. This press release does not constitute an offer to sell or the solicitation of an offer to buy the Notes or any other securities and shall not constitute an offer, solicitation or sale in any jurisdiction in which, or to any person to whom, such an offer, solicitation or sale is unlawful. Any offers of the Notes will be made only by means of a private offering memorandum.

MiFID II professionals/ECPs-only/ No PRIIPs KID: Manufacturer target market (MIFID II product governance) is eligible counterparties and professional clients only (all distribution channels). No PRIIPs key information document (KID) has been prepared as not available to retail in EEA.

Disclaimer

This release may contain forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the United States Securities Exchange Act of 1934, as amended. Forward-looking information involves important risks and uncertainties that could significantly affect anticipated results in the future, and, accordingly, such results may differ from those expressed in any forward-looking statements. These risks and uncertainties include, but are not limited to, general economic, political and business conditions in Brazil and elsewhere, existing and future governmental regulations and management's expectations and estimates concerning the company's financial performance.