Consumables
Black Alumina
EuroBlastTech black alumina is an artificial corundum abrasive made from high-quality bauxite and iron filings through high-temperature smelting. Compared to brown alumina, black alumina has better toughness and lower breakage rate, especially suitable for precision grinding and polishing processes. Widely used in surface treatment of stainless steel, copper-aluminum alloys and other non-ferrous metals, as well as cleaning and polishing of precision castings.
Reference Price ¥79.99 per 25kg bag
Actual price may vary based on specifications and quantity
Pricing by Grade
| Grade | Size | Price/25kg |
|---|---|---|
| 46# | ¥79.99 | |
| 60# | ¥79.99 | |
| 80# | ¥79.99 | |
| 120# | ¥79.99 |
Price/bag(25kg):¥79.99
Final price confirmed upon order
bags (25kg/袋)
Size Range 46# - 120# (0.35mm - 0.12mm)
Hardness 莫氏硬度 8.5-9
Main Component Al₂O₃ ≥80%, Fe₂O₃ 10-15%
Density 3.7-3.9 g/cm³
Packaging 25kg/袋
Standard GB/T 2481
Advantages
Excellent toughness, lower breakage rate than brown alumina
Suitable for precision grinding and polishing
More recycling times, good economy
Fine and uniform surface treatment effect
Specifications
| Size Range | 46# - 120# (0.35mm - 0.12mm) |
| Hardness | 莫氏硬度 8.5-9 |
| Main Component | Al₂O₃ ≥80%, Fe₂O₃ 10-15% |
| Density | 3.7-3.9 g/cm³ |
| Packaging | 25kg/袋 |
| Standard | GB/T 2481 |
Applications
surface-finishing
polishing
precision-grinding
Compatible Machines
air-blasting
wet-blasting
tumbling
Size Selection Guide
| Size | Application |
|---|---|
| 46#, 60# | Stainless steel fine blasting, copper-aluminum alloy surface treatment |
| 80#, 100# | Precision casting polishing, surface finishing |
| 120# | Ultra-precision grinding, mirror polishing pretreatment |
Note: Please contact us before purchasing for latest pricing and stock information.
FAQ
What's the difference between black alumina and brown alumina?
Black alumina has better toughness and lower breakage rate, suitable for precision grinding; brown alumina has slightly higher hardness and stronger cutting power, suitable for rough processing. Black alumina has more recycling times and lower long-term cost.
What materials is black alumina suitable for?
Especially suitable for surface treatment of stainless steel, copper-aluminum alloys and other non-ferrous metals, as well as cleaning and polishing of precision castings. Unlike steel shot, it does not cause rust contamination.
How many times can black alumina be recycled?
Due to good toughness and low breakage rate, black alumina can be recycled 5-8 times, more economical than brown alumina (3-5 times). Regular dust screening and new material replenishment required.
