合金钢板哈氏合金c-4是奥氏体低碳镍钼铬合金。合金钢板哈氏合金。C-4与其他早期开发的化学成分相似的合金的主要区别在于，低碳硅、低铁、低钨含量使合金钢板哈氏合金C-4的化学成分在650-1040之间具有优异的稳定性，提高了晶体间的耐腐蚀性。在适当的制造条件下，可避免焊缝热影响区域的边缘腐蚀敏感性和腐蚀。
ALLOY STEEL PIPE HastelloyC-4 Heat treatment of finished parts
| Condition as supplied by AWI | Type | Temperature | Time | Cooling |
|---|---|---|---|---|
| Annealed or Spring Temper | Stress Relieve | 400 – 450 °C (750 – 840 °F) | 2 Hr | Air |
ALLOY STEEL PIPE HastelloyC-4 Alloy Details
| Density | Melting Point | Coefficient of Expansion | Modulus of Rigidity | Modulus of Elasticity |
|---|---|---|---|---|
| 8.64 g/cm³ | 1399 °C | 10.8 μm/m °C (20 – 100 °C) | 81.2 kN/mm² | 212.4 kN/mm² |
| 0.312 lb/in³ | 2550 °F | 6.0 x 10-6in/in °F (70 – 212 °F) | 11777 ksi | 30807 ksi |
ALLOY STEEL PIPE HastelloyC-4 Chemical Composition
| Element | Min % | Max % |
|---|---|---|
| Cr | 14.00 | 18.00 |
| Mo | 14.00 | 17.00 |
| Fe | – | 3.00 |
| C | – | 0.015 |
| Si | – | 0.08 |
| Co | – | 2.00 |
| Mn | – | 1.00 |
| P | – | 0.04 |
| S | – | 0.03 |
| Ti | – | 0.70 |
| Ni |
Balance |
|