... , 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 desingnation ... yield point "yield" the word is the first Chinese phonetic alphabet; Numerical-represent the yield point;GB/ ...