F 60-1500. High hardness, abrasive resistant, high pressure and anti-oxidation For the alloy, precious stones and other hard materials, grinding, drilling and polishing,manufacturing, and smelting of metal boride Boron sodium, boron alloys and special welding. Size μmT B %T C %Fe2O3%Si%BC%F6025077-8017-190.25-0.450.2-0.496-98F70212F80180F90150F100125F120106F15075F18075-6376-7917-190.25-0.450.2-0. ...