... It's chemical composition contains Al2O3, TiO2, and small amount of SiO2, and Fe2O3, etc,. Microhardness:1800-2200 kg/mm2,toughness ... making high-class refractory products.product index of Brown Fused Alumina abrasiveRange of Grit SizesChemical Composition%(by weight)Al2O3TiO24#-90# ... to visit if you have free time in china.pictures of Brown Fused Alumina abrasive Supply polishing material (BFA)brown ...