Companhia Siderúrgica Nacional
Brazilian integrated steelmaker with major iron-ore, logistics, port and energy interests.
Last updated October 16, 2026
AI crawler reads
No AI crawler has read this profile since Oct 28, 2026.
Overview
Companhia Siderúrgica Nacional, commonly known as CSN, is a Brazilian industrial group centered on integrated steel production. It is one of Brazil’s largest steel producers and has historically ranked among the leading producers in Latin America. Its principal steelworks, the Presidente Vargas Steelworks, is located in Volta Redonda in the state of Rio de Janeiro. The company’s operations extend beyond steelmaking into iron-ore mining, limestone and dolomite extraction, port terminals, rail logistics and power-related investments. CSN was established as a state-owned enterprise on April 9, 1941, during the government of Getúlio Vargas. Its creation followed cooperation between Brazil and the United States under the Washington Accords. The planned steelworks was intended both to support the Allied war effort during the Second World War and to provide Brazil with a domestic industrial foundation. Production began in 1946 under President Eurico Gaspar Dutra. The Volta Redonda complex initially made coke, pig iron and long steel products before developing into a major flat-steel operation. The company expanded substantially during the 1970s. An expansion completed in 1974 raised annual crude-steel capacity to approximately 1.6 million tonnes, while a second project completed in 1977 increased capacity to about 2.4 million tonnes. A further expansion in 1989 lifted capacity to approximately 4.5 million tonnes. CSN was privatized through auctions held in 1993 and early 1994, when the Brazilian government sold its controlling interest as part of the country’s national privatization program. Following privatization, CSN pursued modernization, productivity improvements and greater vertical integration. A capital-improvement program begun in the 1990s supported higher output, product-quality upgrades, environmental work and the transition to continuous casting. By the early 2000s, work on Blast Furnace No. 3 and Hot Strip Mill No. 2 had helped bring stated annual capacity to approximately 5.6 million tonnes of crude steel and 5.1 million tonnes of rolled products. CSN produces slabs, hot-rolled and cold-rolled steel, galvanized products and tin-mill products. These materials serve distributors and customers in packaging, automotive manufacturing, household appliances, construction and other industrial markets. The group also owns or controls iron-ore assets, including the Casa de Pedra mine, providing an important internal source of metallic raw material. Its logistics operations include port and terminal operations and shareholdings in railway companies, supporting the transport and export of ore and steel. The group has pursued both domestic growth and international opportunities. In 2006 and 2007, CSN competed with Tata Steel to acquire the Anglo-Dutch steelmaker Corus. Tata ultimately prevailed in the bidding process. CSN has also maintained interests or business links in Portugal and the United States, but Brazil remains the center of its industrial base. The company’s operations are exposed to cyclical steel demand, raw-material and energy costs, currency movements, trade remedies, environmental regulation, water availability and mining rules. Benjamin Steinbruch is identified in the referenced material as CSN’s chief executive.
History
CSN was created by presidential decree on April 9, 1941, during Brazil’s Estado Novo period under Getúlio Vargas. Its establishment followed the Washington Accords, an agreement through which Brazil and the United States supported the construction of a Brazilian steelworks. The project had both wartime and developmental purposes: it would supply steel-related materials to the Allies during the Second World War and reduce Brazil’s dependence on imported industrial inputs. The Presidente Vargas Steelworks was built at Volta Redonda, in Rio de Janeiro state, and entered operation in 1946 during the presidency of Eurico Gaspar Dutra. The original complex produced coke, pig iron castings and long products. During the 1970s, the company undertook two significant expansions. The first, completed in 1974, increased installed annual crude-steel capacity to roughly 1.6 million tonnes. The second, completed in 1977, raised capacity to approximately 2.4 million tonnes. In 1989, another expansion lifted annual crude-steel capacity to about 4.5 million tonnes. For most of its first half-century, CSN operated under state control within Brazil’s nationally coordinated steel system. The federal government organized much of the flat-steel sector through Siderbrás, while individual integrated producers operated with varying degrees of autonomy. CSN was privatized through auctions in 1993 and early 1994 under Brazil’s National Program for Privatization. The process formed part of a broader move away from direct state ownership of major industrial enterprises. After privatization, CSN implemented an extensive modernization and capital-investment program. Its stated aims included increasing crude-steel output, improving labor and asset productivity, raising product quality, and strengthening environmental protection and remediation. From February 1996 onward, production was based on continuous casting rather than ingot casting, reducing energy use and metal losses. Investment through 2002 supported the refurbishment of Blast Furnace No. 3 and Hot Strip Mill No. 2 at the Volta Redonda complex. These projects contributed to stated annual capacities of approximately 5.6 million tonnes of crude steel and 5.1 million tonnes of rolled products. The company developed an integrated operating model that combined steel production with mining and logistics. Its mining portfolio includes iron ore as well as limestone and dolomite. The Casa de Pedra mine and other mineral assets supply raw materials for the steel business and support export activity. CSN also became involved in port infrastructure, including terminals at Itaguaí, and in rail logistics through shareholdings in railway companies such as MRS Logística. Additional interests have included power-generation assets and industrial operations in Brazil and abroad. In the 2000s, CSN continued to consider expansion in mining, pellets, port capacity and international steel. It announced investment plans involving the Casa de Pedra mine, an adjacent coal and ore terminal, and a proposed pellet plant. The group also sought international acquisitions. Its most prominent attempt was the proposed acquisition of Corus in 2006–2007. CSN entered a competitive contest with Tata Steel, but Tata ultimately won after the bidding process. CSN’s later operating environment has been shaped by the cyclicality of steel, international competition and government measures such as anti-dumping duties, countervailing duties and safeguards. The group also faces environmental permitting obligations, mining regulation, water-use constraints and exposure to energy, currency, interest-rate and inflation movements. Its principal steelworks remains in Volta Redonda, while mining, port, rail and processing assets extend its industrial footprint across Brazil. Benjamin Steinbruch is identified in the referenced material as the company’s current chief executive.
- 2007
Corus acquisition attempt ends
[1]Tata Steel outbid CSN in the contest to acquire Corus.
- 2005
Iron-mining position strengthened
[1]CSN reinforced its mining position through a controlling stake in Companhia Vale do Rio Doce, as described in the reference.
- 2001
Major Volta Redonda modernization completed
[1]Work on Blast Furnace No. 3 and Hot Strip Mill No. 2 helped support higher steel and rolled-product capacity.
- 1996
Continuous casting becomes the production basis
[1]CSN shifted production from ingot casting to continuous casting, improving energy and material efficiency.
- 1993
Privatization begins
[1]CSN was sold through Brazil’s National Program for Privatization.
- 1989
Capacity reaches approximately 4.5 million tonnes
[1]A new expansion increased the company’s annual crude-steel capacity.
- 1977
Second major 1970s expansion completed
[1]A further project raised annual crude-steel capacity to approximately 2.4 million tonnes.
- 1974
First major 1970s expansion completed
[1]Expansion increased annual crude-steel capacity to approximately 1.6 million tonnes.
- 1946
Presidente Vargas Steelworks begins production
[1]The Volta Redonda steelworks began operations during the presidency of Eurico Gaspar Dutra.
- 1941
Company established
[1]The Brazilian government created CSN on April 9 under Getúlio Vargas, following the Washington Accords with the United States.
Products and positioning
Vertically integrated Brazilian steel and mining group serving industrial, construction, automotive, appliance and packaging markets.
Semi-finished steel
Steel slabs
Semi-finished cast steel products used as feedstock for downstream rolling. CSN’s slabs are processed into hot-rolled, cold-rolled and coated coils and sheets for industrial customers.
Flat steel
Hot-rolled steel
Hot-rolled coils and sheets, including heavier-gauge and lighter-gauge products. These materials serve construction, automotive, appliance, machinery and general industrial applications.
Flat steel
Cold-rolled steel
Cold-rolled coils and sheets made by further processing hot-rolled substrate. The products are used where tighter dimensions, surface quality and formability are required.
Coated steel
Galvanized steel
Flat steel coated with zinc or a zinc-based alloy to improve corrosion resistance. CSN supplies galvanized products to sectors including construction, automotive manufacturing and household appliances.
Packaging steel
Tin-mill products
Packaging-oriented products including tinplate, tin-free steel, low-tin-coated steel and black plate. These materials are used for cans and other metal packaging applications.
Mining
Iron ore
Iron ore extracted from CSN’s mining assets, including Casa de Pedra, provides an internal source of raw material for steelmaking and supports domestic and export logistics.
Brand decisions
2006
Bid for CorusM&ABackground
CSN sought international expansion after Tata Steel announced an agreement to acquire Corus, an Anglo-Dutch steelmaker.
Action taken
CSN submitted a rival offer and participated in the resulting competitive bidding process.
Aftermath
Tata Steel ultimately outbid CSN in 2007, so CSN did not acquire Corus.
- Tata Steel — Tata Steel raised its offer and won the competitive auction.
1993
Post-privatization capital-improvement programStrategyBackground
After the government began selling its interest, CSN needed to improve productivity, output, product quality and environmental performance.
Action taken
The company initiated a capital program that was later revised and extended, including major upgrades at the Volta Redonda complex.
Aftermath
The program supported continuous casting, modernization of core equipment and higher stated capacity for crude steel and rolled products.
Recent events
CSN Cimentos agrees to acquire Elizabeth Cimentos[2]
Reported:
CSN announced that its subsidiary CSN Cimentos had reached an agreement to acquire Elizabeth Cimentos from Farallon Fund for R$1.08 billion (US$214 million). The transaction is subject to regulatory approval.
Sources2 sources
Cite this profile: Cite the canonical profile. /brand-wiki/companhia-siderúrgica-nacional · Editorial policy · How profiles are compiled