Arcelor S.A. was the world's largest steel producer in terms of turnover and the second largest in terms of steel output, with a turnover of €30.2 billion and shipments of 45 million metric tons of steel in 2004. The company was created by a merger of the former companies Aceralia (Spain), Usinor (France) and Arbed (Luxembourg) in 2002.

Arcelor S.A. was the world's largest steel producer in terms of turnover and the second largest in terms of steel output, with a turnover of €30.2 billion and shipments of 45 million metric tons of steel in 2004. The company was created by a merger of the former companies Aceralia (Spain), Usinor (France) and Arbed (Luxembourg) in 2002.