... )GB1591-1994, Q345 3)JIS G3101, SS400 Spec.GradeStandard SizeCarbon Structual SteelQ195-Q235GB3274-19882.0-100mmX1000-2000SS330, SS400JIS G31032.0-100mmX1000 ... -3000S45C,S50C,S58CJIS G31065-100mmX1500-3000Low Alloy and High Strength Structual SteelQ295,Q345,Q390,Q420GB3274-19865-100mmX1500-3000SM400,SM490,SM520,SM570JIS ... -3000A572,A573,A633ASTM5-100mmX1500-3000 Durable in use Hot Rolled Steel Coils