Stainless Steel 17-4 PH
17-4 PH is a precipitation-hardened martensitic stainless steel that combines high strength, good corrosion resistance, and excellent mechanical properties. It can be heat-treated to various strength levels and is widely used in aerospace and defense.
Machinability
50/100
Tolerance
±0.02 mm
Category
Stainless Steel
Material Properties
| Property | Value |
|---|---|
| Tensile Strength | 1,070 MPa (155 ksi) |
| Yield Strength | 1,000 MPa (145 ksi) |
| Hardness | 36 HRC |
| Density | 7.78 g/cm³ |
| Machinability Rating | 50/100 |
| Thermal Conductivity | 18.3 W/m·K |
| Melting Point | 1,400–1,440 °C |
| Tolerance | ±0.02 mm |
Common Grades
17-4 PH H90017-4 PH H102517-4 PH H1150
Advantages
- Very high strength
- Good corrosion resistance
- Heat-treatable
- Good fatigue properties
Limitations
- Difficult to machine in hardened condition
- Expensive
- Requires careful heat treatment
Common Applications
Turbine blades
Valve stems
Aerospace fasteners
Nuclear components
Pump shafts
Industries Served
AerospaceDefenseEnergyOil & GasNuclear
Available Surface Finishes
PassivationElectropolishBead Blast
Material Comparisons
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