CSN Discloses Audited Quarterly Results

São Paulo, Brazil, December 26th 2017 - Companhia Siderúrgica Nacional (B3: CSNA3; NYSE: SID), in line with the Material Facts disclosed on May 15, August 15 and October 30, 2017, hereby announces to its shareholders and to the market in general that the Company has already filed its Quarterly Information (ITR), reviewed by the independent auditors, on the first, second and third quarters of 2017.

For further information, please contact:

Investor Relations
David Moise Salama
Investor Relations Executive Officer
Phone: +55 (11) 3049-7588