15 5PH vs 17 7PH
Property comparison of 15 5PH and 17 7PH, both stainless steel.
| Property | 15 5PH | 17 7PH | Difference |
|---|---|---|---|
| Yield strength | 1,000 MPa | 1,586 MPa | +59% |
| Tensile strength | 1,069 MPa | 1,655 MPa | +55% |
| Elongation | 12 % | 1 % | -92% |
| Elastic modulus | 196,000 MPa | 200,000 MPa | +2% |
| Density | 7,780 kg/m³ | 7,810 kg/m³ | 0% |
| Brinell hardness | 331 HB | 477 HB | +44% |
Difference is 17 7PH relative to 15 5PH. Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- grade
- S15500
- standard
- AMS 5659 / AMS 5862
- heat treatment
- H1025
- grade
- S17700
- standard
- AMS 5529
- heat treatment
- CH900
About precipitation-hardening stainless steels
PH grades reach high strength through aging at intermediate temperatures while keeping the corrosion resistance of austenitic or martensitic grades. 17-4 PH and 15-5 PH are the common bar and forging stocks for aerospace and pump shafts. Mechanical properties depend strongly on the aging condition (H900, H1025, H1150).
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