... 2.The max weight of steel ingot is 60 ton High strength structural steel plates in the quenched and tempered condition is our ... ,X56,X60,X65,X70,X80,X100API spec 5L-2004 4311High strength structural steel plates in the quenched and tempered conditionH:5-150W ... H:5-150W:900-4800I:3000-2500020MnTiB,N,360,NM400 High strength structural steel plates in the quenched and tempered condition