PH13-8Mo Stainless Steel
PH13-8Mo, UNS S13800, is a high strength martensitic precipitation hardening stainless steel produced by VIM+VAR double vacuum melting. It contains 12.25% to 13.25% chromium, 7.5% to 8.5% nickel, 2.0% to 2.5% molybdenum, 0.90% to 1.35% aluminum, and carbon limited to ≤0.05%. Aging precipitates β-NiAl and carbides to balance strength and toughness. The source also describes corrosion resistance, including marine stress corrosion resistance, high temperature stability, and use in aerospace, nuclear, and petrochemical equipment.
Product details
Chemical composition
| PH13-8Mo | C | Si | Mn | P | S | Ni | Cr | Mo | N | Al |
|---|---|---|---|---|---|---|---|---|---|---|
| min | – | – | – | – | – | 7.5 | 12.5 | 2.0 | – | 0.9 |
| max | 0.05 | 0.1 | 0.1 | 0.01 | 0.008 | 8.5 | 13.25 | 2.5 | 0.01 | 1.35 |
Grade equivalents
| English Item | UNS | W.Nr. | JIS | GB/T | Other Grades |
|---|---|---|---|---|---|
| PH13-8Mo 13-8Mo Alloy 13-8 | S13800 | 1.4534 | – | S51380 0Cr13Ni8Mo2Al | X3CrNiMoAl13-8-3 XM-13 |
Physical properties
| Density g/cm³ | 7.85 |
|---|---|
| Melting range ℃ | 1405-1440 |
| Thermal conductivity (100℃) λ/(W/m•℃) | 24.3 |
| Specific heat J/kg•℃ | 502 |
| Elastic modulus GPa | 200-210 |
| Electrical resistivity μΩ•m | 0.42 |
| Linear expansion coefficient a/10-6℃-1 | 12.5 |
Mechanical properties
| Tensile strength Rm N/mm | ≥1515 |
|---|---|
| Yield strength RP0.2 N/mm | ≥1410 |
| Elongation % | ≥6 |
| Hardness HB | ≥429 |
| *After H950 aging heat treatment | |
Available product forms
- Round Bar
- Plate
- Pipe & Tube
- Welding Consumables
- Flanges
- Hex Bolts
- Threaded Rod
- Nuts & Washers
Technical values are transcribed and translated from the supplied Milike Chinese catalogue. Confirm the applicable purchase specification, heat treatment condition, and inspection requirements before final material selection.
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