Hardness Grade Classification
Steel grit is classified into three hardness grades:
| Grade | Hardness Range | Characteristics |
|---|---|---|
| GP (Regular) | HRC 52-56 | Economical, general use |
| GL (High) | HRC 56-60 | Strong cutting, heavy rust removal |
| GH (Ultra-high) | HRC 60-65 | Extreme cutting, special applications |
Grade Selection Basis
GP Regular Hardness
- Applications: General rust removal, surface cleaning
- Features: Longer life, lower breakage rate
- Advantages: Best value, daily use choice
GL High Hardness
- Applications: Heavy steel structure rust removal, coating stripping
- Features: High cutting efficiency, fast processing
- Advantages: Ideal for stubborn rust and old coatings
GH Ultra-high Hardness
- Applications: Special high-intensity treatment
- Features: Extreme cutting power, higher breakage
- Advantages: Maximum efficiency, special needs
Hardness vs Life Relationship
Higher hardness means stronger cutting but shorter life:
Hardness ↑ = Cutting efficiency ↑, Life ↓, Breakage ↑
Hardness ↓ = Cutting efficiency ↓, Life ↑, Breakage ↓
Cost Consideration
| Grade | Initial Cost | Consumption | Total Cost |
|---|---|---|---|
| GP | Low | Slow | Low-Medium |
| GL | Medium | Medium | Medium |
| GH | High | Fast | High |
Workpiece Matching
| Workpiece Type | Recommended | Reason |
|---|---|---|
| Soft steel, aluminum | GP | Avoid over-cutting |
| Regular steel structure | GL | Efficiency-life balance |
| Heavy steel structure, cast steel | GH | Maximum cutting |
| Coating removal | GL-GH | Fast stripping |
Usage Notes
- Hardness matching: Select based on workpiece hardness
- Screening maintenance: Higher hardness = higher breakage, frequent screening needed
- Mixed use: Different grades can be mixed for balance
- Equipment matching: Ensure blaster power supports high hardness grit
Selection Tip: We offer GP, GL, GH hardness grades, sizes G0.2-G2.0 available. Professional selection advice based on your process needs.
