... 42CrMo, 20Cr, 40Cr, 10CrMoAL, 38CrMoAL, 20CrMnMo, 12CrMoVNi, 30CrMnSiABridge Steel Plate: 1>. Standard: Special Condition Grade: 14MnNbq2>. GB ... Q370qC, Q420qC Building Structural Steel Plate: GB Q235GJC, Q345GJC, Q390GJC, Q420GJC, Q460GJCHigh Quality Carbon Steel Plate: 1>. ASTM 10252>. ... GB 20Mn, 50Mn, 10#, 20#, 25#, 30#, 35#, 40#, 45#, 50# Wear Resistant Steel ...