A572 Steel Plate Precision Grinding,Inc. ASTM A572 Steel General Information.The ASTM A572 carbon steel specification covers the standard requirements for Grades 42,50,55,60,and 65 for high-strength low-alloy columbium-vanadium structural steel shapes,plates and bars for applications in bolted,riveted and welded structures in bridges and buildings.ASTM A572 High Strength Steel6 rows · ASTM A572 High Strength Steel. Standard:ASTM. Thickness:1mm-200mm. Length:1000mm-15000mm.