Grinding hardened carbon steel and high speed steel, the main mineral composition A-alo is more than 98% , the hardness is similar to Brown corundum, but the toughness is lower, and the cutting performance is higher than Brown corundum. White Corundum is more expensive than Brown corundum. Mainly used for grinding high carbon steel, high speed steel and stainless steel, fine abrasive can also be used for precision casting and Refractory. For Metal slotting, polishing, high efficiency, and not easy to burn the workpiece.