... . 2.Grinding wide use for metal. 3.BEST quality Tungsten carbide board for punch dies,stamping dies, step ... grade alloy, with good wear resistance, used for processing blades,wear resistance parts etc.YM814.7 ... strength, wear resistance lower than MK6A, used for processing blades,wear resistance parts etc.YM1514.5 ... 2500 87.5 Used for punch dies,stamping dies and wear resistance ...