Main grades for domestic market: Q355B、Q390B、Q420MB, and for international market: S355JR、A572Gr50Ti. With excellent comprehensive performance, good low-temperature performance, perfect cold stamping performance, and outstanding welding and mechanical performance, low alloy high strength steel are widely used in steel structure, shelf, hardware, machinery, vehicles and other industries.. Size range: (2-22)*(1010-2000)mm