Brown fused alumina is made from high quality bauxite by fusing in an electric arc furnace at high temperature. It has good toughness and high hardness. It is suitable for manufacturing of vitrified and resin bonded tools, and for lapping polishing and sand blasting. It can be also used to make superior refractory products.

Physical Properties

Color: Dark Brown
Bulk Density: 115-125lb/cu.ft.
Specific Gravity: 3.9
Grain Shape: Angular/sharp
Hardness: 9 Mohs

Chemical Composition (% by weight)
Grits          Al2O3     TiO2      magnetic matter
16# - 30#   94.5 - 97.0 1.5 - 3.8       0.038max
36# - 60#   94.5 - 97.0 1.5 - 3.8       0.028max
70# - 90#   94.5 - 97.0 1.5 - 3.8       0.023max
100# - 120# 93.5 min    1.5 - 3.8       0.023max
150# - 180# 93.5 min    1.5 - 3.8       0.017max
220# - 240# 92.5 min    1.5 - 3.8       0.017max

Available Grits/sizes
#8 (2800 ~ 2360 micron)
#10 (2360 ~ 2000 micron)
#12 (2000 ~ 1700 micron))
#14 (1700 ~ 1400 micron)
#16 (1400 ~ 1180 micron)
#20 (1180 ~ 1000 micron)
#22 (1000 ~ 850 micron)
#24 (850 ~ 710 micron)
#30 (710 ~ 600 micron)
#36 (600 ~ 500 micron)
#40 (500 ~ 425 micron)
#46 (425 ~ 355 micron)
#54 (355 ~ 300 micron)
#60 (300 ~ 250 micron)
#70 (250 ~ 212 micron)
#80 (212 ~ 180 micron)
#90 (180 ~ 150 micron)
#100 (150 ~ 125 micron)
#120 (125 ~ 106 micron)
#150 (106 ~ 75 micron)
#180 (90 ~ 63 micron)
#220 (75 ~ 53 micron)