Aluminum Oxide

Opta Minerals your source for Blast Cleaning Abrasives:

Aluminum oxide is the second-hardest mineral after diamond.

Opta Minerals makes brown aluminum oxide produced by fusing bauxite and anthracite in an electric arc furnace at high temperature.

The resulting oxide is over 95% Al₂0₃. Its high density and angular sharpness make it one of the fastest, most versatile and economical cutting abrasives available, usable in both dry and wet blasting applications from cleaning and deburring to etching and finishing.

Opta Minerals offers a wide range of grades to meet the particular needs of your job, from a coarse profile to a micro finish.

Advantages of Aluminum Oxide

Wide range of grades available for different jobs and profiles
Non-reactant – will not interfere with your coatings
The high percentage of TiO₂ (2.8%) shows the toughness of the product, which results in longer cutting life, more circulations before breaking down and increased cost-effectiveness.
No detectable “crystalline silica”

Available Sizes:

Grit No	Micron
8	2800 - 2360
10	2360 - 2000
12	2000 - 1700
14	1700 - 1400
16	1400 - 1180
20	1180 - 1000
24	1000 - 850
30	850 - 710
36	710 - 600
40	600 - 500
46	425 - 355
54	355 - 300
60	300 - 250
70	250 - 212
80	212 - 180
90	180 - 150
100	150 - 125
120	125 - 106
150	106 - 75
180	90 - 63
220	75 - 53

Technical Specifications

Symbol	Name	Percentage
Al₂O₃	(Aluminum Oxide)	96.4%
TiO₂	(Titanium Dioxide)	2.8%
SiO₂(total)	(Silicon Dioxide - Amorphous)	0.56%
CaO	(Calcium Oxide)	0.15%
MgO	(Magnesium Oxide)	0.11%
Fe₂O₃	(Iron Oxide)	0.08%

Characteristics

Colour:	Brown
Bulk Density:	115–125 lbs/ft³
Specific Gravity:	3.9
Grain Shape:	Angular / sharp
Solubility:	Insoluble
Hardness:	9 Mohs (see our hardness index)

Packaging:

50 lb paper bags, 40 bags/pallet

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