... AH40, DH40, EH40, 2H Grade 50 Alloy Structural Steel Plate:Standard: Special ConditionGrade: 50Mn2V, 15CrMo, 20Mn2, 40Mn2, 20MnSi ... 40Cr, 10CrMoAL, 38CrMoAL, 20CrMnMo, 12CrMoVNi, 30CrMnSiA Bridge Steel Plate:1>. Standard: Special Condition Grade: 14MnNbq2>. GB Q235qC, ... Q345qC (16Mnq), Q370qC, Q420qC Building Structural Steel Plate:GB Q235GJC, Q345GJC, Q390GJC, Q420GJC, Q460GJCDetails of the ...