Arcelor S.A. (Euronext: LOR) was the worl'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.