Brown aluminum oxide abrasive is fused and crystallized under high temperature from a mixture of bauxite and other materials. It is characterized by its high 
hardness, good toughness and sharp shape in particles. Suitable for grinding metals of high-tensile strength such as carbon stele, general purpose alloy steel, malleable cast-iron and hard bronze etc.
Brown fused alumina, also known as carborundum, is made from bauxite and petroleum coke as raw material, melting in an electric arc furnace at a high temperature of 2200℃. It is a brown hexagonal crystal with a hardness of mosh 9.
Application
- Brown fused alumina is the most common abrasives used by industry for refractory materials, sandblasting, free grinding, resin abrasives, coated abrasives, waterjet cutting, water filtration and function filter, etc.
- Brown fused alumina is used for lapping and polishing process.
- Brown fused alumina is used for making producing molds in precision casting.
Physical Index of Brown Fused Alumina
| Color | Brown |
| Basic Mineral | α-AI2O3 |
| True Density | 3.90g/cm3 |
| Bulk Density | 1.68-1.95g/cm3 |
| Mosh hardness | 9.0 |
| Microhardness | HV1800-2200 |
Chemical Composition of Brown Corundum Typical Value:
| AI2O3 | 95.88% |
| TiO2 | 2.50% |
| SiO2 | 0.80% |
| Fe2O3 | 0.09% |
Abrasives Grade
| Grit size | AI2O3 | TiO2 | SiO3 | Fe2O3 |
| F12-F80 | >96.0% | 1.50-3.50% | 1.3% | 0.3% |
| F90-F150 | >95.2% | |||
| F180-F220 | >95.0% | |||
| F220 Finer | >93.0% |
Refractory Grade
| Grade size | AI2O3 | TiO2 | SiO2 | Fe2O3 |
| 0-1mm | >95.2% | >3.5% | >1.0% | >0.2% |
| 1-3mm | ||||
| 3-5mm | ||||
| 5-8mm | ||||
| 200mesh | >95.0% | >3.5% | >2.0% | >0.4% |
| 325mesh |
Size Available:
Abrasives F16-F1200, P12-P1200
Refractory 0-1mm,1-3mm,3-5mm,200mesh,325mesh
Other special specifications could be supplied as required