COMPANHIA SIDERÚRGICA NACIONAL

Publicly-Held Company

Corporate Taxpayer's ID (CNPJ/MF): 33.042.730/0001-04

NOTICE TO THE MARKET

COMPANHIA SIDERÚRGICA NACIONAL ("Company"), pursuant to CVM

Instruction 308, of May 14, 1999, as amended, hereby informs its shareholders and the market in general that it has hired Grant Thornton Auditores Independentes to provide independent audit services for the Company and its subsidiaries in fiscal years 2017, 2018 and 2019, in replacement of Deloitte Touche Tohmatsu Auditores Independentes, in accordance with Article 31 of said CVM Instruction, which prescribes mandatory rotation of independent auditor firm every five (5) years.

São Paulo, December 7, 2017.

Companhia Siderúrgica Nacional

David Moise Salama Investor Relations Officer

CSN - Companhia Siderúrgica Nacional published this content on 07 December 2017 and is solely responsible for the information contained herein.
Distributed by Public, unedited and unaltered, on 07 December 2017 21:07:10 UTC.

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