The raw material for steel is iron ore and/or recycled steel scrap. The molten iron, which is produced in a blast furnace (BF) or electric arc furnace (EAF), is purified in a converter. The required alloying elements are added in the secondary metallurgy. Finally, the steel is cast into slabs, which are then rolled and heat treated. Before delivery, the material can be leveled, blasted, galvanized, metal and color coated.