... of grit sizes.Applications:CF-16 is used in making vitrified bonded grinding wheels, resign bonded grinding wheels. As loose grains, it is widely used for ... %Fe2O3 0..33%Physical Properties:Color BlackShape AngularCrystal Form Alpha silicon carbide in hexagonal systemSpecific Gravity 3.21Hardness 2750 kg/mm ... , 280, 320, 360, 400, 500, 600, 800, 1000, 1200. Black Silicon Carbide used for Ceramic