Companhia Siderurgica Nacional interests in the steel, mining, cement, logistics, and energy sectors. It operates through the following segments: Steel, Mining, Logistics, Cement and Energy. The Steel segment includes the production, distribution, and sale of carbon steel. The Mining segment extracts iron ore, tin ore, and imports coal and coke. The Logistics segment comprises of railway and port facilities. The Cement segment produces CP-III type cement as well as explores limestone and dolomite. The Energy segment consists of generation plants to maintain its self-sufficiency in energy. The company was founded on April 9, 1941 and is headquartered in São Paulo, Brazil.