ferroalloy. Lower F.C.Fe203,good shapes Supper choice for bonded abrasives and coated abrasives Popular in Japan. Black carborundum ... wheels,mounted wheels,oil stone,abrasive media,and also suitable for surface gringing,lapping or polishing.The abrasive products made of it ... are suitable for working on Cast Iron,Non-ferrous Metal,Rock,Leather,Rubber ...