PH13-8Mo / X3CrNiMoAl13-8-2
1.4534Premium aerospace precipitation-hardening stainless. Al-precipitation for the highest transverse toughness and most uniform properties of all PH stainless grades. SCC-resistant in marine environments. Used for landing gear, structural airframe parts, nuclear components, and high-performance shafts.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AMS | USA | UNS S13800 | S13800 | REF |
| 🇪🇺 | EN | Europe | X3CrNiMoAl13-8-2 | 1.4534 | 95% |
Sources: AMS 5629, EN 10088-3
Chemical composition comparison (wt%)
Side-by-side: PH13-8Mo / X3CrNiMoAl13-8-2 (ASTM) (AMS 5629) vs X3CrNiMoAl13-8-2 (EN)
| Element | PH13-8Mo / X3CrNiMoAl13-8-2 (ASTM) | X3CrNiMoAl13-8-2 (EN) | Overlap |
|---|---|---|---|
| C | 0–0.05% | — | — |
| Si | 0–0.1% | — | — |
| Mn | 0–0.1% | — | — |
| Cr | 12.25–13.25% | — | — |
| Mo | 2–2.5% | — | — |
| Ni | 7.5–8.5% | — | — |
| Al | 0.9–1.35% | — | — |
| N | 0–0.01% | — | — |
Mechanical properties
H950
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ≥ 1410 | MPa |
| Yield Strength | ≥ 1310 | MPa |
| Elongation | ≥ 8 | % |
| Hardness HRC | 44–48 | HRC |
| Elastic Modulus | ≥ 196 | GPa |
| Density | ≥ 7.76 | g/cm3 |
H1000
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ≥ 1275 | MPa |
| Yield Strength | ≥ 1170 | MPa |
Heat treatment
| Process | Temperature | Medium | Holding Time | Notes |
|---|---|---|---|---|
| solution_treating | 925–950 °C | air | 30-60 min | Cool to -73°C within 24h for martensite completion |
| aging_H950 | 510–510 °C | air | 4 hours | H950: Peak strength (1410 MPa UTS) |
| aging_H1000 | 540–540 °C | air | 4 hours | H1000: Better toughness |
Compatibility verdict
PH13-8Mo / X3CrNiMoAl13-8-2 and X3CrNiMoAl13-8-2: 95% composition match
Close equivalents but NOT identical.
Related materials
304 Stainless Steel
1.4301The most widely used austenitic stainless steel. Excellent corrosion resistance, good formability and weldability. Standard choice for food processing, chemical, and architectural applications.
316L
1.4404Low-carbon austenitic stainless steel with molybdenum addition. Superior corrosion resistance to 304, especially against chlorides and pitting. Standard choice for chemical processing, marine, medical implants, and pharmaceutical equipment.
430 Stainless Steel
1.4016Ferritic chromium stainless steel with good corrosion resistance and formability. Lower cost than austenitic grades. Used for automotive trim, kitchen sinks, architectural panels, and appliance components.
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