Companhia Siderúrgica Nacional operates as an integrated steel producer in Brazil. It operates through five segments: Steel, Mining, Logistics, Cement, and Energy. It produces a line of steel products, including slabs, hot and cold-rolled, galvanized, and tin mill products for the distribution, packaging, automotive, home appliance, and construction industries. It also explores for iron ore reserves at Casa de Pedra and Engenho mines located in the state of Minas Gerais, produces and sells cement, provides railroad and port logistics services.