... :20053High strength low-alloy structural steelsQ345-Q460-Q550-Q690GB1591-2008A36,A283,A529ASTMSM400,SM490,SM520,SM570JIS G31064Structural steel for bridgesH:6-120W ... :900-4800I:3000-25000A,B,D,E,A32,D32,E32,A36,D36,E36,F32,F36,A40,D40,E40,F40,DH55,EH55 ...