AMAG (Austria Metall AG) is the biggest company in the Austrian Aluminium industry sector.

After the annexation, an aluminum smelter known as Mattigwerk (named after the river Mattig) was built in 1939 by Vereinigte Aluminiumwerke AG, Berlin in Ranshofen near Braunau am Inn.

The company had plants in Ranshofen, Berndorf, Amstetten, Unterlaussa and Esslingen am Neckar as well as a forestry estate in Halltal near Mariazell.

In the fall of 1960 all shares in the former foreign subsidiaries Societa per Azioni Italiana Metalli ed Argenteria Arthur Krupp, Milan and Berndorfer Metall-Werk AG, Lucerne were acquired.

[5] In the course of a structural concept for the operations of the ÖIAG Group adopted by Österreichische Industrieholding AG (ÖIAG), which, in accordance with the principle of coordinated decentralization, divided the old subgroups into smaller companies and reorganized them into industry groups according to the sectors to which they belonged, a far-reaching restructuring occurred at Austria Metall AG: With retroactive effect from January 1, 1987, Austria Metall AG hived off its operating functions into independent companies and concentrated exclusively on the functions of a holding company for the nonferrous metals sector.

At the beginning of 1990, the Group was again restructured and henceforth divided into six divisions: AMAG Metal (tankhouses in Australia and Canada, remelting plants in Ranshofen, Wuppertal and Furth).

Since October 2014, B&C Industrieholding GmbH has held a voting majority of 52.7% in AMAG Austria Metall AG.

[7] In November 2014, AMAG opened the new hot rolling mill as well as the plate production and the expanded foundry at the Ranshofen site.

[10] In September 2018, AMAG became the world's first integrated company with rolling mill, foundry and recycling to be certified according to the ASI Performance Standard.