Salzgitter AG, together with its subsidiaries, engages in steel and technology businesses worldwide. It operates through four segments: Steel Production, Steel Processing, Trading, and Technology. The Steel Production segment manufactures steel and special steels, such as hot-rolled wide strip, steel sheet, sections, tailored blanks, as well as scrap trading.

The Steel Processing segment produces various high-grade heavy plates; and manufactures line pipes, HFI-welded tubes, and precision and stainless-steel tubes. The Trading segment operates a European sales network, as well as trading companies and agencies worldwide. The Technology segment engages in the provision of machinery and plants for the filling and packaging of beverages, as well as special machinery engineering for shoe manufacturing and elastomer production.

The company also provides IT, facility management, logistics, automotive engineering, and research and development services, as well as supplies raw materials.