CSS Siderúrgica Setelagoana Ltda. is a Brazilian company based in Sete Lagoas, Minas Gerais, operating in the iron and steel industry. It was incorporated on September 21, 2005, and specializes in the production of pig iron, a key raw material for steel manufacturing. ​


The company is a member of SINDIFER (Sindicato da Indústria de Ferro no Estado de Minas Gerais), an organization that represents pig iron producers in the region.