ATI S240 (Martensitic PH) vs Ph15 7MO
Property comparison of ATI S240 (Martensitic PH) and Ph15 7MO, both stainless steel.
| Property | ATI S240 (Martensitic PH) | Ph15 7MO | Difference |
|---|---|---|---|
| Yield strength | 1,482 MPa | 1,138 MPa | -23% |
| Tensile strength | 1,544 MPa | 1,276 MPa | -17% |
| Elastic modulus | 179,300 MPa | 199,948 MPa | +12% |
| Density | 7,770 kg/m³ | 7,667 kg/m³ | -1% |
Difference is Ph15 7MO relative to ATI S240 (Martensitic PH). 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
- UNS S11900
- standard
- AMS 5929
- heat treatment
- Solution Annealed + Aged H1000 (538°C)
- grade
- PH15-7Mo
- standard
- MIL-HDBK-5J
- heat treatment
- TH1050
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).
What else is in Engineering Database
AI built for engineering. Searches the engineering database, performs calculations, gives source-backed engineering insights.
Get started for free ↗Reference Data375 engineering tablesMaterial properties, pipe and shape dimensions, code tables, and electrical ratings across mechanical, civil, chemical, electrical, materials, and manufacturing engineering.
Browse dataCalculatorsDeterministic engineering calculatorsSizing, checking, and conversion tools that run against the reference tables. Inputs are code-compliant, outputs are traceable to the source standard.
Browse calculators