High-Temperature Performance Analysis
Stainless Steel Chrome Plated Bars in Extreme Conditions
Substrate Limitations
Critical heat resistance values for common stainless steels:
| Material | Oxidation Temp | Strength at 425°C |
|---|---|---|
| 304 SS | 870°C | 50% of RT |
| 316L SS | 650°C | 60% of RT |
200°C 400°C 600°C
Coating Thermal Stability
Thermal expansion mismatch between materials:
Chromium: 6.5×10⁻⁶/℃ vs Stainless Steel: 17×10⁻⁶/℃
300°C for 100hrs → 50% higher peeling risk
Performance degradation at elevated temperatures:
- 400°C: Hardness drops from 1000HV to 600HV
- Hydrogen embrittlement risk under cyclic loads
Improvement Solutions
Short-term usage parameters:
- ＜200℃ for ＜1 hour (light load)
- Example: Food machinery steam cleaning
Material upgrades:
| Solution | Max Temp |
|---|---|
| Incoloy 800 substrate | 800°C |
| Ni-Cr composite plating | 300°C |
Technical Conclusion
Not recommended for continuous use above 200°C. For higher temperatures consider:
- Nitrided rods (38CrMoAl, 500°C)
- Ceramic coatings (Al₂O₃, 1200°C)
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