ASTM A633/A633M Standard Specification for Normalized High-Strength Low-Alloy Structural Steel Plates.ASTM A633/A633M specification covers normalized high-strength low-alloy structural steel plates for welded, riveted, or bolted construction. ASTM A633/A633M Standard main steel grade:ASTM A633Grade A,C,D,E(A633GRA,A633GRC,A633GRD,A633GRE)