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.