... profile plate or Tapered plate.Catalog No.Steel typeDimension(mm)GradeStandard1Carbon structural steelsH:5-350W:900-4800I:3000-25000Q235,Q275GB/T700 ... spec 5L-2004 4311High strength structural steel plates in the quenched and tempered conditionH:5-150W:900-4800I:3000-25000Q460,Q500 ... Q550,Q620,Q690,Q890,Q800,Q960GB/T16270-200912Wear-resistant steel H:5-150W:900-4800I:3000-2500020MnTiB,N,360,NM400 Bailey ...