After WWII destruction, the Klöckner Werke AG acquired the site and surrounding land, and by 1957 the modern steelworks—Klöckner Hütte Bremen—began producing steel, now with all major stages of production on site: from iron making, through steelmaking, to hot rolling.

Ownership evolved through the late 20th century: after financial troubles at Klöckner, the plant was taken over in 1994 by Sidmar and renamed Stahlwerke Bremen. With the mergers of its parent companies, it became part of Arcelor, then in 2006 ArcelorMittal Bremen

Technological milestones include the 1964 power plant using blast furnace gas, the commissioning of Blast Furnace No. 3 in 1966 (rebuilt in 2009) and modernization of Blast Furnace No. 2 in 1995. Coating capacity grew with galvanizing lines such as BREGAL (1990s) and BREGAL 2 (2001).

Today the 7 km² site employs around 3,000 people and produces up to 4 million tonnes of raw steel annually.