Steel Shot Size Basics
Steel shot is classified by diameter into various sizes: S0.3, S0.5, S0.8, S1.0, S1.2, S1.5, S2.0, etc. The number represents the diameter in millimeters.
Key Selection Factors
1. Workpiece Material Hardness
- Soft materials (e.g., aluminum alloys): Use S0.3-S0.5
- Medium hardness (e.g., regular steel): Use S0.8-S1.2
- High hardness materials (e.g., cast steel): Use S1.0-S2.0
2. Surface Treatment Goal
- Cleaning and oxide removal: S1.0-S2.0 for strong impact
- Surface strengthening: S0.3-S0.8 for better coverage
- Rust/coating removal: S0.8-S1.5 medium size
3. Machine Capacity
- Blaster power determines maximum shot size
- Low-power machines should not use oversized shot
- Consider circulation system capacity
Application Recommendations
| Application | Recommended Size | Hardness |
|---|---|---|
| Cast cleaning | S1.0-S2.0 | HRC 45-50 |
| Surface strengthening | S0.3-S0.8 | HRC 40-45 |
| Steel structure rust removal | S0.8-S1.5 | HRC 40-50 |
| Aluminum treatment | S0.3-S0.5 | HRC 30-40 |
Usage Tips
- Sample testing recommended for first purchase
- Different sizes can be mixed for combined results
- Regular screening to remove broken particles
Expert Tip: Incorrect shot size selection may damage surfaces or reduce efficiency. Contact our technical team for professional advice.
