Aluminum Oxide

Aluminum Oxide is the second-hardest mineral after diamond. Opta Minerals distributes brown Aluminum Oxide produced by fusing bauxite and anthracite in an electric arc furnace at high temperature.The resulting Oxide is over 92% Al203. Its high density and angular sharpness make it one of the fastest, most versatile and economical cutting abrasives available. Aluminum Oxide is used in both dry- and wet-blasting applications for cleaning, deburring, etching and finishing.

Opta Minerals offers a wide range of grades to meet the particular needs of your applications, 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 (1-4%) 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) 92.0 – 96.5

TiO2
(Titanium Dioxide) 1.0 – 4.0

Fe2O3
(Iron Oxide) 0.1 – 1.5

SiO2
(Silicon Dioxide – Amorphous) 0.15%
Less than 1.0% impurities and other trace elements.

Characteristics

Color: Brown
Bulk Density: 115-125 lb/ft3
Specific Gravity: 3.9
Grain Shape: Angular/sharp
Solubility: Insoluble
Hardness: 9 Mohs

Packaging

50 lb. paper bags, 40 bags/pallet