Grade: RG25 Metal content: 99.96 impurity content: 0.4 Uses: used for cutting and punching pads, blocks for EDM. Ultra-fine grain carbide tungsten steel than using YT, YG, YW three ordinary carbide has good heat resistance and overall wear resistance, not only its significantly improved tool life, cutting the number of efficiency times, and the surface roughness of the workpiece was also significantly reduced. It can be widely used.