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
