... DH36, EH36, AH40, DH40, EH40, 2H Grade 50 Alloy Structural Steel Plate:Standard: Special ConditionGrade: 50Mn2V, 15CrMo, 20Mn2, 40Mn2, ... : 14MnNbq2>. GB Q235qC, Q345qC (16Mnq), Q370qC, Q420qC Building Structural Steel Plate:GB Q235GJC, Q345GJC, Q390GJC, Q420GJC, Q460GJCDetails of ... the yield point;GB/T1591-94Used for engineering machinery, steel structure, Bridges, buildings, etc, and has good strength ...