Grade: HSF939 Metal content: 99.96 impurities: 0.4 fine, for high-speed machining of hard and superhard materials (hardness> 60HRC), in particular a rotary tool for thin. Carbide cutting tools than high speed steel cutting 4 to 7 times the tool life is 5 to 80 times. Manufacture of molds, gauges, alloy tool steel, high life expectancy than 20 to 150 times. 50HRC be about cutting hard materials. However, carbide brittleness, can not be cutting, hard into the overall shape of the complex tool, often made of different shapes of blades, welding, bonding, mechanical clamping methods such as die mounted on the cutter body or the use of specific .