PH13-8Mo AMS 5629
PH13-8Mo AMS 5629 is a precipitation-hardening martensitic stainless steel that has excellent strength, high hardness, superior toughness, and good corrosion resistance. It is double vacuum melted in a VIM-VAR process. 13-8 PH steel provides a wide range of properties through a single precipitation hardening heat treatment. Its corrosion resistance is similar to 304 stainless, with greatest resistance in the fully hardened conditions.
Stock sizes: 0.500” to 8.000” diameter
Common Specifications:
- AMS 5629
- Pratt & Whitney LCS F-17
- General Electric S-400 / S-SPEC-35
- ASTM A564; CAPABLE OF H1000
- ASTM F899 XM-13
- HMS 6-1105 (EXCEPT SONIC)
- DMS 2100 GRADE B
- UNS S13800
Industry Trade Names:
- PH13-8Mo
- UNS S13800
- XM-13
Common Applications:
- Aerospace components
- Components in the petrochemical and nuclear industries
- Injection molding equipment
Macrostructure Limits:
| Class | Condition | Severity |
|---|---|---|
| 1 | Freckles | A |
| 2 | White Spots | A |
| 3 | Radial Segregation | A |
| 4 | Ring Pattern | B |
Hardness of bars shall not exceed 363 HB.
Precipitation hardening parameters:
| Condition | Temperature |
|---|---|
| H950 | 950 °F ± 10 °F (510 °C ± 6°C) |
| H1000 | 1000 °F ± 10 °F (538 °C ± 6°C) |
| H1025 | 1025 °F ± 10 °F (552 °C ± 6°C) |
| H1050 | 1050 °F ± 10 °F (566 °C ± 6°C) |
| H1100 | 1100 °F ± 10 °F (593 °C ± 6°C) |
| H1150 | 1150 °F ± 10 °F (621 °C ± 6°C) |
Composition
| Element | Min. | Max. |
|---|---|---|
| Carbon | — | 0.05 |
| Manganese | — | .10 |
| Silicon | — | 0.10 |
| Phosphorus | — | 0.010 |
| Sulfur | — | 0.008 |
| Chromium | 12.25 | 13.25 |
| Nickel | 7.50 | 8.50 |
| Molybdenum | 2.00 | 2.50 |
| Aluminum | 0.90 | 1.35 |
| Nitrogen | — | 0.010 |
Bars shall be solution heat treated by heating to 1700 °F ± 25 °F, holding at heat for a time commensurate with section thickness, heating equipment, and procedure used, and cooling to below 60 °F.
Average grain size for diameters up to 3” = ASTM No. 5 or finer
Average grain size for diameters over 3” = ASTM No. 4 or finer
Minimum tensile properties:
Minimum tensile properties after precipitation heat treatment, inch/pound units
| Condition | Specimen Orientation | Tensile Strength ksi | Yield Strength at 0.2% Offset ksi | Elongation in 2 inches or 4D % | Reduction of Area % |
|---|---|---|---|---|---|
| H950 | Longitudinal Transverse | 220 220 | 205 205 | 10 10 | 45 35 |
| H1000 | Longitudinal Transverse | 205 205 | 190 190 | 10 10 | 50 40 |
| H1025 | Longitudinal Transverse | 185 185 | 175 175 | 11 11 | 50 45 |
| H1050 | Longitudinal Transverse | 175 175 | 165 165 | 12 12 | 50 45 |
| H1100 | Longitudinal Transverse | 150 150 | 135 135 | 14 14 | 50 50 |
| H1150 | Longitudinal Transverse | 135 135 | 90 90 | 14 14 | 50 50 |
