... bonded grinding wheels. As loose grains, it is widely used for pressure blasting, surface finish and other general industrial applications.Typical ... BlackShape AngularCrystal Form Alpha silicon carbide in hexagonal systemSpecific Gravity 3.21Hardness 2750 kg/mm, 9.2 Mohs scaleMagnetic Material 0.0065%Macrogrit ... , 280, 320, 360, 400, 500, 600, 800, 1000, 1200. Black Silicon Carbide used for Ceramic