Usiminas Belo Horizonte Rua Prof. José Vieira de Mendonça, 3011 31310-260 Belo Horizonte MG T 55 31 3499-8000 F 55 31 3499-8899 www.usiminas.com USINAS SIDERÚRGICAS DE MINAS GERAIS S.A. - USIMINAS CNPJ/MF 60.894.730/0001-05 NIRE 313.000.1360-0 Publicly Traded Company MATERIAL FACT Usinas Siderúrgicas de Minas Gerais S.A. – USIMINAS (“Usiminas” or “Company”), by its Vice President of Finance and Investors Relations undersigned and pursuant to the terms of §4º of article 157 of Law nº 6.404/1976 and CVM Instruction nº 358/2002, hereby informs its shareholders and the public in general that its Board of Officers, at a meeting held on October 28th, 2015, decided to temporarily interrupt the activities of the primary areas of the Cubatão/SP Plant. The deactivation process will be gradual and will involve sinter and coke plants, blast furnaces (one of which had already paralyzed its activities since May 2015) and steelworks, as well as all the activities associated with such equipments. Such adjustment intends to reposition Usiminas into a new level of scale and competitiveness before an economic context of progressive deterioration of the steel market. In this scenario, the Cubatão Plant will cease to produce slabs, but its hot and cold rolling lines will remain active, as well as the activities related to its port terminal. The heavy plates rolling line will remain temporarily suspended. Belo Horizonte, October 29th, 2015. Ronald Seckelmann Vice President of Finances and Investors Relations