ASTM A572/A572M Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel.ASTM A572/A572M specifiation covers the standard requirements for Grades 42 [290], 50 [345], 55 [380], 60 [415], and 65 [450] of high-strength low-alloy columbium-vanadium structural steel shapes, plates, sheet piling, and bars for applications in bolted, welded, and riveted structures in bridges and buildings.ASTM A572/A572M Standard main steel grade:ASTM A572Grade 42,50,55,60,65(A572GR42,A572GR50,A572GR55,A572GR60,A572GR65).