Aluminum Oxide - White
Higher purity abrasive for grinding high carbon steel, alloy steel, and high speed steel
Get pricing and availability within 24 hours
Hardness
~2100–2200 kg/mm² Knoop (~9.0 Mohs)
Grit Range
12–600 & fine powder grades (F, FF, FFF)
Availability
2-Week Delivery
Minimum Order
10 lbs per grit
Product Overview
White aluminum oxide is electrically fused from Bayer alumina, resulting in a white, angular abrasive with slightly higher hardness but lower toughness than brown aluminum oxide. This sharp, fast-cutting abrasive is silica-free and specifically designed for grinding steels with high hardness.
Its combination of high hardness, sharpness, and chemical stability makes it well suited for bonded and coated abrasive products used on hardened steels. White aluminum oxide can produce a matte finish or anchor pattern on metal surfaces and is sometimes used in closed-system blasting for high-purity or specialty applications.
The material's heat resistance and corrosion resistance ensure consistent performance in demanding grinding and surface preparation work.
Key Characteristics
- High hardness - Higher purity and more friable behavior than brown aluminum oxide
- Sharp and angular - Fast cutting action
- Chemically stable - Heat and corrosion resistant
- Silica-free - Safer for blasting applications
- Lower toughness - More friable fracture behavior than brown aluminum oxide
- Versatile - Suitable for multiple abrasive and non-abrasive uses
When to Use
Best for grinding steels with high hardness:
- High carbon steel
- Alloy steel
- High speed steel
- Hardened steel applications requiring higher purity abrasive
ⓘ Note: White aluminum oxide has slightly higher hardness but lower toughness than brown aluminum oxide. Choose white for harder steels; choose brown for general metalworking and applications requiring greater toughness.
Common Applications
Abrasive Applications
- Grinding wheels and cutting tools
- Coated abrasives (sandpaper, belts, discs)
- Metal lapping and polishing
- Pressure blasting and surface preparation
- Tumbling and vibratory finishing
- Deburring operations
Non-Abrasive Applications
- Precision investment casting molds
- Spray coating material
- Catalyst carrier
- High temperature ceramic
- Specialty refractory applications
- Chemical fillers (high-purity requirements)
Technical Specifications
Physical Properties
PROPERTY | VALUE |
|---|---|
Color | White |
Hardness (Knoop) | ~2100–2200 kg/mm² |
Hardness (Mohs) | 9.0+ |
Bulk Density | 1750-1900 kg/m³ |
Particle Specific Gravity | 3.9-4.0 |
Chemical Composition
Al₂O₃ | Fe₂O₃ | TiO₂ | SiO₂ | CaO | MGO |
|---|---|---|---|---|---|
99.0%+ | <0.10% | <0.10% | <0.20% | <0.10% | <0.10% |
Note: White aluminum oxide has higher purity than brown aluminum oxide.
Pricing & Ordering Information
Minimum Order
10 lbs per grit size
All sizes available
Volume Discounts
Special pricing for 500+ lbs
Call for quote
Fast Delivery
2-week delivery
Call for current pricing
Aluminum Oxide - White (Type WP) | Net Price Per Pound
LBS | KG | 12-100 | 120-240 | 280-400 | 500 | 600 |
|---|---|---|---|---|---|---|
10 lbs | 4.5 | $4.00 | $4.25 | $8.00 | $8.75 | $11.75 |
25 lbs | 11.3 | $3.75 | $4.00 | $7.75 | $8.50 | $11.50 |
50 lbs | 22.7 | $3.50 | $3.75 | $7.50 | $8.25 | $11.25 |
100 lbs | 45.4 | $3.25 | $3.50 | $7.25 | $8.00 | $11.00 |
* Prices shown for reference only. Contact us for current pricing.
Availability & Delivery
All grit sizes from 12 through 600 and powder grades F, FF, FFF are available with 2-week delivery. Minimum order 10 lbs per grit size.
Note: Grit sizes 6, 8, 10, and 90 are not available in white aluminum oxide.