ferroalloy. Lower F.C.Fe203,good shapes Supper choice for bonded abrasives and coated ... for make grinding wheels,cutting wheels,mounted wheels,oil stone,abrasive media,and also suitable for surface gringing,lapping or polishing ... JIS standard.Grits available are as following: Grit SiC≥ F.C≤ Fe2O3≤SiC98.5 98.5 0.20 0.06SiC98 98 ... SiC65~75 65~75 5.00 4.00 Black carborundum silicon carbide ferroalloy