... , 15MnNiDRHSLA/ High Strength Low Alloy Steel Plate: 1>. Standard: ASTM Grade: A572 Grade 50, A709 Grade 50, A633D ... DH36, EH36, AH40, DH40, EH40, 2H Grade 50Alloy Structural Steel Plate: Standard: Special ConditionGrade: 50Mn2V, 15CrMo, 20Mn2, 40Mn2, ... (16Mnq), Q370qC, Q420qCBuilding Structural Steel Plate: GB Q235GJC, Q345GJC, Q390GJC, Q420GJC, Q460GJCHigh Quality Carbon Steel Plate: 1>. ASTM 10252>. ...