Pink Fused Alumina Abrasive (PA)
1. High hardness with greater toughness than white fused alumina Pink fused alumina has hardness similar to white fused alumina and toughness between white and brown fused alumina. It resists grain chipping during grinding, improving abrasive tool durability and life. 2. Good sel...
Read the full description- Color
- Pink / pale rose / purplish red
- Grade
- 20PA, 45PA, 100PA
- Grit size
- F8-F220 for bonded abrasives; P grades and micropowders available on request
- Melting point
- Approximately 2050℃
Bodan supplies this item to specification. Share the material, machine and required finish and we will confirm the grade, dimensions and packing for your order.
Advantages
Key features
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High hardness with greater toughness than white fused alumina
Pink fused alumina has hardness similar to white fused alumina and toughness between white and brown fused alumina. It resists grain chipping during grinding, improving abrasive tool durability and life.
-
Good self-sharpening for sustained sharpness
Dulled grains undergo microfracture to expose fresh cutting edges and maintain efficient cutting.
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Low grinding heat reduces workpiece burning
Low heat generation lowers grinding-zone temperature to help prevent burns, distortion and cracks, particularly during precision processing of heat-sensitive hardened and stainless steels.
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Low loading and high surface finish
The abrasive resists loading on stainless and alloy steels, producing a high surface finish with stable Ra values of 0.4-0.05 μm for precision applications.
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Acid and alkali resistance with good thermal stability
Good chemical and thermal stability suit demanding operating conditions.
Technical data
Specifications
- Color
- Pink / pale rose / purplish red
- Grade
- 20PA, 45PA, 100PA
- Melting point
- Approximately 2050℃
- Mohs hardness
- 9.0 - 9.1
- Particle density
- 3.90 - 4.10 g/cm³
- Smelting process
- Electric arc fusion (>2000℃)
- Loose bulk density
- 1.40-1.91 g/cm³, depending on grit size
- Primary raw materials
- Industrial alumina and chromium oxide
- Grit size
- F8-F220 for bonded abrasives; P grades and micropowders available on request
Product details
About this product
Product Overview
Pink fused alumina, designated PA and also known as red corundum or synthetic ruby, is a premium abrasive made from industrial alumina powder with chromium oxide (Cr₂O₃) by arc fusion above 2000℃. Its angular crystals are translucent pink, pale rose or purplish red.
Hardness similar to white fused alumina and greater toughness combine strong cutting ability with fracture resistance for precision grinding.
Product Parameters
| Specifications | Details |
|---|---|
| Product name | Pink Fused Alumina Abrasive (PA) |
| Primary raw materials | Industrial alumina and chromium oxide |
| Smelting process | Electric arc fusion (>2000℃) |
| Appearance / color | Pink / pale rose / purplish red |
| Mohs hardness | 9.0 - 9.1 |
| Particle density | 3.90 - 4.10 g/cm³ |
| Bulk density | 1.40-1.91 g/cm³, depending on grit size |
| Melting point | Approximately 2050℃ |
| Grit range | F8-F220 for bonded abrasives; P grades and micropowders available on request |
Core Performance Advantages
1. High hardness with greater toughness than white fused alumina
Pink fused alumina has hardness similar to white fused alumina and toughness between white and brown fused alumina. It resists grain chipping during grinding, improving abrasive tool durability and life.
2. Good self-sharpening for sustained sharpness
Dulled grains undergo microfracture to expose fresh cutting edges and maintain efficient cutting.
3. Low grinding heat reduces workpiece burning
Low heat generation lowers grinding-zone temperature to help prevent burns, distortion and cracks, particularly during precision processing of heat-sensitive hardened and stainless steels.
4. Low loading and high surface finish
The abrasive resists loading on stainless and alloy steels, producing a high surface finish with stable Ra values of 0.4-0.05 μm for precision applications.
5. Acid and alkali resistance with good thermal stability
Good chemical and thermal stability suit demanding operating conditions.
Applicable Materials
High-carbon steel, alloy steel and high-speed steel
Hardened steel and bearing steel
Stainless steel
Tool steel and mold steel
Materials for precision gauges and instrument components
Main Applications
Application areas and specific uses
Precision grinding: gauges, machine spindles, instrument parts, threaded workpieces and templates
Bonded abrasives: vitrified wheels for cylindrical, internal, surface, tool and form grinding; resin wheels, cut-off wheels and mounted points
Coated abrasives: pink alumina belts, cloth and paper for precision polishing and deburring
Blasting: hardware, glass, zinc alloys, aluminum alloys, stainless steel, high-carbon steel and high-speed steel; especially thin-walled parts requiring no discoloration and a high finish
Grinding and polishing: silicon wafers, optical lenses, precision instruments, glassware, ceramics and metal parts
Refractories: chrome-alumina bricks, glass-furnace linings and premium refractory products
Grades by Chromium Oxide Content
| Grade | Cr₂O₃ content | Al₂O₃ content (typical) | Applications |
|---|---|---|---|
| Low chromium (20PA) | 0.20 - 0.45% | ≥98.5% | Cost-effective precision grinding |
| Medium chromium (45PA) | 0.45 - 1.00% | ≥98.2% | Most widely used; balanced overall performance |
| High chromium (100PA) | 1.00 - 2.00% | ≥97.4% | High toughness and maximum durability |
Grit Selection Reference
| Grit range | Suitable operation |
|---|---|
| F8 - F30 | Rough and heavy-duty grinding |
| F36 - F60 | General and semi-finish grinding |
| F70 - F120 | Finish grinding and precision machining |
| F150 - F220 | Fine grinding and high-finish machining |
| Micropowder (W5-W40) | Ultra-precision polishing and mirror finishing |
Packaging
Common packaging options include:
Standard: 25 kg woven bags with liners
Bulk packaging: 1 ton plastic woven bags
Custom: special packaging on request
Storage Recommendations
Store in a cool, dry, ventilated place away from moisture.
Do not store together with corrosive substances such as acids and alkalis.
Keep stacking height appropriate to prevent packaging damage.
Inquiry
Request a quote.
For Pink Fused Alumina Abrasive (PA)
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Pink Fused Alumina Abrasive (PA) Pricing, lead time and packing for wholesale and OEM orders.