ferroalloy. Lower F.C.Fe203,good shapes Supper choice for bonded abrasives and coated abrasives Popular in Japan. Black carborundum ... electrical and heat conducitivity in some degree.It is suitable for make grinding wheels,cutting wheels,mounted wheels,oil stone,abrasive ... or polishing.The abrasive products made of it are suitable for working on Cast Iron,Non-ferrous Metal,Rock,Leather,Rubber,Wood ...