PowerPoint Presentation

CSN cordially invites you to join the conference

call to discuss its

1Q15 EARNINGS

Earnings Release

WEDNESDAY, May 06, 2015 - before trading session

Conference Call

(in Portuguese with simultaneous translation into English)

Participants: The Company's Management
Date /Time: WEDNESDAY, May 06, 2015

10:00 a.m. - US ET

11:00 a.m. - Brasília Time

Dial-in:

+1 (516) 300 1066

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) 3127 4999

distributed by