... : GB, ASTM, JIS,3. Material: Q195, Q235, Q345B, SS4004. Specification: 20^20~300^300mm,; Length:6m,9m,10,12m, 5.8 meters for ... 20' container, 6 meters to 12 meters for 40' container.Commodity: ... Angle Steel BarSize (mm)Tolerance (mm)Thickness (mm)Tolerance (mm)20±0.83,4±0.425±0.83,4±0.430 ...