Companhia Siderurgica Nacional engages in the production and sale of integrated steel. It operates through the following segments: Steel, Mining, Cement, Logistics, and Energy. The Steel segment offers flat steel, long steel, metallic containers, and galvanized steel. The Mining segment encompasses the activities of iron ore and tin mining. The Cement segment produces CP-III type cement as well as explores limestone and dolomite. The Logistics segment manages railways and port terminals comprise the logistics system that integrates mining, steelmaking, and cement units. The Energy segment consists of generation plants such as electricity to power rolling mills, production lines, hot metal processing, coking plants, and auxiliary units. The company was founded in 1913 and is headquartered in Sao Paulo, Brazil.