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)