MATERIAL FACT Publicly-Held Company

COMPANHIA SIDERÚRGICA NACIONAL
Corporate Taxpayer's ID (CNPJ/MF): 33.042.730/0001-04
The Board of Directors of COMPANHIA SIDERÚRGICA NACIONAL authorized, on this date, a new share buyback program ("Share Buyback Program"), which will be held in treasury for subsequent sale or cancellation.
The Share Buyback Program shall respect the following limits and conditions, pursuant to the provisions of CVM Instructions 10/80 and 358/2002:

I. The Company's objective: to maximize the creation of value to shareholders by means of an efficient capital structure management. II. Number of shares to be acquired: up to 70,205,661 shares. III. Effective period for performing authorized transactions: from March 14,

2014 to April 14, 2014, inclusively.

IV. Free float: 702,056,615 shares. V. Place of Acquisitions: Stock Exchange. VI. Maximum Share Price: share acquisition price cannot exceed its market price. VII. Brokers: Itaú Corretora de Valores S.A.: Av. Brigadeiro Faria Lima, 3400 - 10º andar - in the city of São Paulo; BTG Pactual Corretora de Mercadorias Ltda.: Av. Brigadeiro Faria Lima, 3477 - 10º andar - in the city of São Paulo; and Itaú USA Securities Inc.: 767 Fifth Avenue - 50th Floor - in Nova York city. VIII. The Board of Directors has entrusted the Company's Board of Executive Officers to take all necessary measures to implement the resolution, including the establishment of the most convenient date to start the share buyback.

São Paulo, March 13, 2014.

Companhia Siderúrgica Nacional

David Moise Salama
Investor Relations Executive Officer

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