Aceralia

In 1950 the state owned company Empresa Nacional Siderúrgica Sociedad Anónima (ENSIDESA) was formed to increase Spain's steel production,^[2] part of the industrialisation and modernisation of Spain that led to the Spanish economic miracle of the 1960s.^{[citation needed]} In 1973 the state owned company was forced to take over the Asturian steel company UNISA, which had invested heavily in a fully integrated steel works and did not have the capital to fund it.^[3]

In 1991 the state owned company ENSIDESA was merged with Altos Hornos de Vizcaya to form the Corporacion de la Siderurgia Integral from which the Corporación Siderúrgica Integral (CSI) was formed in 1994 from the more profitable parts (as part of a privatisation process).^[2]

In 1997 Aceralia Corporación Siderúrgica was formed by reorganisation of CSI, the same year the company formed a strategic alliance with the Luxembourg-based steel group Arbed.^[2] As soon as it was formed, it was also privatised.^[4] The group also acquired the Aristrain Group (steel sections), and Ucín (rebar, wire rod), in the process becoming the largest steel company in Spain.^[2] In 2001 the company merged with two other European steel producers, ARBED and Usinor, to form Arcelor.^[5] It became part of ArcelorMittal in 2006 with a plant in Avilés and Gijón, Etxebarri, Lesaka and Legasa, Sagunto and Sestao (part of Greater Bilbao).

• List of steel producers

• Pierangelo Maria Toninelli (2000). The rise and fall of state-owned enterprise in the western world. Cambridge University Press. Public versus private growth patterns: Case studies : The Iron and Steel Industry, pp.220-222. ISBN 9780521780810.