Stainless Steel 17-4 PH (17-4PH)
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Basic Properties
| Alloy Type | |
|---|---|
| Designation | 17-4PH |
| Density | 7.8 g/cm³ |
| Melting Point | 1400-1440°C |
Composition
| Element | Percentage |
|---|
Description
Precipitation-hardening martensitic stainless steel with high strength and moderate corrosion resistance.
| Density | 7.8 g/cm³ |
|---|---|
| Electrical Resistivity | 80 μΩ·cm |
| Tensile Strength | 1035-1275 MPa |
|---|---|
| Yield Strength | 965-1200 MPa |
| Elongation | 10-16% |
| Hardness | 30-45 HRC |
| Machinability | Excellent in annealed condition, more difficult when hardened |
| Melting Point | 1400-1440°C |
|---|---|
| Thermal Conductivity | 19.2 W/(m·K) |
| Thermal Expansion | 10.8 μm/(m·K) |
| Heat Treatment | Solution treatment at 1040°C + aging at 480°C for 1-4 hours |
| Heat Treatment | Solution treatment at 1040°C + aging at 480°C for 1-4 hours |
|---|---|
| Corrosion Resistance | Good corrosion resistance with high strength, susceptible to stress corrosion cracking |
Applications
Aerospace components, chemical equipment, food processing equipment, nuclear waste handling, pump shafts
History
Developed during WWII for high-strength aircraft applications.