... 2.The max weight of steel ingot is 60 ton High strength structural steel plates in the quenched and tempered condition is ... GB/T711-2008S45C,S50C,S55CJIS G4051:20053High strength low-alloy structural steelsQ345-Q460-Q550-Q690GB1591-2008A36,A283,A529ASTMSM400,SM490,SM520, ... H:5-150W:900-4800I:3000-2500020MnTiB,N,360,NM400 High strength structural steel plates in the quenched and tempered condition