Black fused alumina abrasive
For Sandblasting, Polishing & Anti-Slip Surfaces
FEPA / JIS / ANSI GRIT STANDARDS
ISO 9001 QUALITY CONTROL
COA PER BATCH
COST-EFFECTIVE & DURABLE
- Exceptional toughness and durability: With high TiO2 content enhancing fracture resistance, it outperforms softer abrasives in heavy-duty grinding and blasting, reducing downtime and abrasive consumption.
- Sharp, blocky grain shape: Enables aggressive cutting action and excellent surface finish, making it suitable for both bonded and coated abrasives.
- Cost-effective alternative: Provides a balance of performance and price compared to premium options like white fused alumina or silicon carbide, ideal for high-volume industrial use.
- Reliable global supply: Produced in major regions with consistent quality, ensuring availability for international buyers seeking refractory aggregate or grinding wheel abrasive.
TECHNICAL SPECIFICATIONS
Chemical Composition
| Component | Typical Content (%) | Range (%) |
|---|---|---|
| Al₂O₃ | 80 | 75-85 |
| SiO₂ | 10 | 9-11 |
| Fe₂O₃ | 8 | 6-9 |
| TiO₂ | 2.5 | 1.5-3.5 |
| Others | Balance | – |
Physical Properties
| Property | Value |
|---|---|
| Color | Black |
| Crystal Form | Trigonal System |
| Mohs Hardness | 8-9 |
| Specific Gravity | 3.5-3.9 g/cm³ |
| Bulk Density | 1.75-1.95 g/cm³ |
| Melting Point | ≈2050°C |
| Maximum Use Temperature | ≈1850°C |
Black Corundum Grit Size Chart
| FEPA Grit | Average Particle Size (µm) | Typical Applications |
|---|---|---|
| F12 | 1400-2000 | Coarse blasting |
| F24 | 600-850 | Rust removal |
| F36 | 425-600 | Surface prep |
| F60 | 212-300 | Fine grinding |
| F120 | 90-125 | Polishing |
| F220 | 53-75 | Precision finishing |
Key Advantages Over Alternatives
| Feature | Black Fused Alumina | Brown Fused Alumina |
|---|---|---|
| Al₂O₃ Content | 75-85% | 95%+ |
| Hardness (Mohs) | 8-9 | 9 |
| Toughness | High | Moderate |
| Cost | Lower | Higher |
| Best For | Polishing, blasting | Heavy grinding |
NOTE: Custom sizes available upon request.
Application areas
Sandblasting and Rust Removal: Efficiently removes paint, scale, and contaminants with minimal dust and heat.
Anti-Slip Flooring Aggregates: Provides wear-resistant, non-skid surfaces for safety.
Polishing Stainless Steel and Metals: Achieves smooth finishes due to self-sharpening grains.
Grinding Wheels and Coated Abrasives: Enhances durability in resin-bonded tools like sandpaper.
PACKAGING AND LOGISTICS
Standard Packaging: 25kg woven bags, 1-ton jumbo bags, or pallets.
1000kg heavy-duty jumbo bags on ISPM 15 pallets. Efficient for forklift handling and bulk transport.
Secure steel drums for high-purity powders. We offer full OEM private labeling to build your brand.
- Standard Packaging: 25kg woven bags, 1-ton jumbo bags, or pallets.
- Minimum Order Quantity (MOQ): 1 metric ton (flexible for samples).
- Lead Time: 7-15 days for stock items; 20-30 days for custom orders.
- Certifications: ISO 9001 compliant; REACH and RoHS available upon request.
- Shipping: FOB/CIF terms from major Chinese ports.
Ready to experience the benefits of Black Fused Alumina abrasive grit?
Contact us with your application, required grit size, and quantity for a tailored quote.