PowerPoint Presentation

CSN cordially invites you to join the conference

call to discuss its

2Q15 EARNINGS

Earnings Release

THURSDAY, August 13, 2015 - before trading hours.

Conference Call

(in Portuguese with simultaneous translation into English)

Participants: The Company's Management
Date /Time: THURSDAY, August 13, 2015

09:00 a.m. - US ET

10:00 a.m. - Brasília Time

Dial-in:

+1 (646) 843 6054

Code : CSN

Please connect 15 minutes prior to the scheduled time.

Webcast: Live audio webcasts of the conference call will be available through the website:

www.csn.com.br/ir

Digital Replay: Digital replay will also be made available for one week.

Please dial +55 (11) 2188 0400

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