Ralf Henkelmann

Interfer Stahl GmbH is a company based in Duisburg, Germany and is part of Knauf Interfer SE. The CEOs of the German company are Bill Talayman, Ralf Henkelmann. The company offers an online tool and calculator for determining the carbon equivalent value (CEV) and provides complex extruded profiles and finished parts made from aluminum alloys. The company offers a range of standard and application-optimized alloys. The company places great importance on education and training, providing a foundation of skills that can be supplemented and expanded through further education. The success of the company is built on the skills and dedication of its employees.

Delta-Stahl GmbH manufactures and processes surface-treated, as well as cold- and hot-rolled plates, sheets, and coils. Its products are used in the automotive, furniture, construction, electrical, and household appliance industries. The firm also provides downstream distribution services. The company was founded in 1982 and is headquartered in Barsinghausen, Germany.