What is DIN 17100 structural steel plate ST52-3 material? DIN 17100 structural steel plate ST52-3 is weldable low carbon manganese steel with good impact resistance. ST52-3 material is low alloy high strength steel and can be readily welded to other weldable steel. The steel plate ST52-3 is commonly supplied in the untreated or normalized condition. With low carbon equivalent, ST52-3 material possesses good cold-forming properties. DIN 17100 structural steel plate ST52-3 is used to build ships, bridges, mobile equipment, machinery parts, buildings, crane, boom, chassis and most structurals.