Black Silicon Carbide grinding wheel is black or dark blue, shiny. Hardness than white corundum high, Brittle and Sharp, good thermal conductivity and electrical conductivity, grinding cast iron. Brass, aluminum, Refractory, and nonmetallic materials are more brittle than corundum. Black Silicon Carbide grinding wheel is suitable for grinding materials with lower tensile strength. In addition, black silicon carbide has lower hardness than green silicon carbide. Otherwise the grinding wheel will wear out quickly. Commonly used in grinding optical glass, cemented carbide, titanium alloy and bearing steel grinding and polishing, high-speed steel cutting tool grinding and so on.