... use for metal. 3.BEST quality Hard metal plates for processing blades, wear parts Grade Performance & application recommendedDensityT.R.SHardnessg/cm3MP ... .0 Fine grade alloy, with good wear resistance, used for processing blades,wear resistance parts etc.YM814.7 2400 89.5 ... High bending strength, wear resistance lower than MK6A, used for processing blades,wear resistance parts etc.YM1514.5 2500 87.5 ...