Companhia Siderúrgica Nacional (CSN) is the second major steel-maker company in Brazil. Its main plant is located in the cities of Volta Redonda and Barra Mansa, in the state of Rio de Janeiro. Its current CEO is Benjamin Steinbruch.Companhia Siderúrgica Nacional is the largest fully integrated steel producer in Brazil and one of the largest in South America in terms of crude steel production. Its annual crude steel capacity and rolled product capacity are 5.6 million and 5.1 million tons, respectively. It produces a broad line of steel products, including slabs, hot- and cold-rolled, galvanized and tin mill products. Its products are used by the distribution, packaging, automotive, home appliance and construction industries.
CSN accounted for approximately 49% of the galvanized steel products sold in Brazil. In 2004, it accounted for approximately 98% of the tin mill products sold in Brazil. It is one of the world's leading producers of tin mill products. CSN also owns its own source of iron ore.