Brown Fused Alumina Brown Fused Alumina (BFA) is produced in an electric arc furnace at temperatures in excess of 2000?. BFA is the result of fusing bauxite to reduce the silica levels and forming a material with a higher alumina content. BFA is used in the production of bonded abrasives (grinding wheels), coated abrasives (sandpaper and cloth), blasting grain, polishing compounds, refractories, ceramics, and other applications. TYPICAL CHEMICAL ANALYSIS AI2o3 96.8% TiO2 2.61% SiO2 0.5% Fe2O3 0.08% Na2O 0.02% TYPICAL PHYSICAL PROPERTIES Crystallography: Alumina, crstallizeed in the hexagonal system. 50% monocrystalline. Color: Brown Specific Gravity: 3.95 Gms/cc Knoop 100 Hardness Number: 2050 Shape: Blocky, with sharp edges Grading: FEPA-F #42-GB-1984 Grit Sizes Available ANSI/ISO/FEPA Grit Sizes #10, 12, 14, 16, 20, 24, 30, 36, 46, 54, 60, 70, 80, 90, 100, 120, 150, 180, 220, 240, 280. Also TUMBLING CHIPS #00, 0, 1, 1.5, 2, 2.5, 3, 3.5, 4, 5, 6, 8 mesh. FEPA Grit Sizes (Water Classified) F320, 360, 400, 500, 600, 800, 1000, 1200. Optical Grades (Water Classified) #14.5, 17.5, 22.5, 25, 27.5 micron