Grade: GU15UF Hardness: 93.2 Density: 14.6 Flexural strength: 3500 Performance and application: ultra-fine grain, suitable for processing glass, steel, titanium alloys, high hardness of hardened steel. Commonly used in the lathe tool, impact drill bit, glass cutter, tile cutter on top of hard afraid of annealing, but brittle list of rare metals tungsten steel sintering the powder is pressed into the blank, and then into the sintering furnace heated to a certain temperature (sintering temperature), and maintain a certain period of time (holding time), and then cooled down to obtain the desired properties of tungsten steel