Brown Aluminum Oxide (A)

imageBrown Aluminum Oxide powders are fused with premium raw materials and 3500 KVA furnace. It is perfect material specifically manufactured to be used for general abrasive applications in bonded abrasive tools, and lapping and polishing processes. While aluminum oxide has lower hardness and abrasive capacity than diamond, boron carbide, and silicon carbide, it is widely used for grinding ferrous materials, finishing tough and hard materials. It is also be used as high-class refractory materials. Brown aluminum oxide is offered in macro and micro powder form, in both F and P grades.

Physical Characteristics
Item Brown Aluminum Oxide
Basic Mineral a-Al2O3
Crystal Color Brown
True Density >3.9g/cm3
Mohs Hardness 9
Knoop Hardness HVl800—2200
Symbol and Grit Sizes
GB/T3043-2000
Chemical Composition%
Al2O3 TiO2 CaO
A
A-P1
4#~80#
(P8~P80)
95.00~97.50 1.50~3.80 ≤0.45
9#~150#
(P8~P80)
94.00~97.50
180#~220#
(P8~P80)
93.00~97.50
220#(P220) ≥92.00
A-B
A-P2
4#~80#
(P8~P80)
≥93.00 1.50~4.20 /
90#~220#
(P100~P220)
≥91.00 /
220#(P220) ≥90.00 ≤4.50 /
A-S 16#~220# ≥92.00 ≤4.20 /
Grit Sizes Available
Grit No. Grit Diameter
(micro meter)
Grit No. Grit Diameter
(micro meter)
#4 5600~4750 #36 600~500
#5 4750~4000 #40 500~425
#6 4000~3350 #46 425~355
#7 3350~2800 #54 355~300
#8 2800~2360 #60 300~250
#10 2360~2000 #70 250~220
#12 2000~1700 #80 210~180
#14 1700~1400 #90 180~150
#16 1400~1180 #100 150~125
#20 1180~1000 #120 125~106
#22 1000~850 #150 106~75
#24 850~710 #180 90~63
#30 710~600 #220 75~53

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