The Genk stainless-steel works, now operated by Aperam, traces its modern development to the mid-1960s. Around 1965, the site expanded as part of the ALZ (Allegheny-Longdoz) group, focusing on cold-rolled stainless steel and benefiting from Limburg’s industrial workforce.

In the 1990s–2000s, consolidation in the European steel sector brought the plant under Arcelor, and later ArcelorMittal after the 2006 merger.

In 2011, stainless operations were spun off to form Aperam, making Genk a core European production site. Since then, the plant has been modernized with advanced finishing lines and electric electric steel making shop with two 110t EAFs, two AOD converters and a slab caster.

Today, the Genk works is a key stainless-steel hub, emphasizing efficiency and lower-carbon production while remaining a major industrial employer in the region.