... Description:GC-GPA is a green, friable, medium bulk density silicon carbide abrasive grain. To get this kind of grains, we specially ... , to process cast iron, hard alloy, tatium alloy and high speed steel. As loose grains, it is widely used for ... Fe2O3 0.12%Physical Properties:Color GreenShape AngularCrystal Form Alpha silicon carbide in hexagonal systemSpecific Gravity 3.20Hardness HV3280-3400, 9.15 ...