CSN announces new mineral reserve certification


CSN announces new mineral reserve certification of 3.0 billion tonnes of iron ore in the Casa de Pedra and Engenho mines, 85% more than the amount certified in 2007

COMPANHIA SIDERÚRGICA NACIONAL (BOVESPA: CSNA3; NYSE: SID) hereby informs its shareholders and the public in general that, on this date, the Board of Directors acknowledged and received the new certification report of the iron ore reserves of Casa de Pedra and Engenho mines (“Report”).

The Report was prepared by Snowden do Brasil Consultoria Ltda. in accordance with the methodology adopted by the Australasian Code for Reporting of Exploration Results, Mineral Resource and Ore Reserves pursuant to JORC Code 2012 and industry best practices. The Report certifies reserves of 3,021 million tons of iron ore, which represents an 85% increase in comparison to the amount certified in the last report prepared in April 2007 by Golder Associates.

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