17-4PH Edelstahl (UNS S17400): Properties, Heat Treatment & Applications
AMS 5643 / ASTM A564 · Published: 2026-06-02 · Updated: July 2026
17-4PH is a martensitic precipitation-hardening stainless steel that combines high strength (up to 1,240 MPa yield) with corrosion resistance comparable to Type 304. The precipitation hardening mechanism — copper-rich epsilon-phase precipitates...
17-4PH ist ein martensitic precipitation-hardening stainless steel das combines hoch strength (auf zu 1,240 MPa yield) mit corrosion widerstand comparable zu Typ 304. Der precipitation hardening mechanism — copper-rich epsilon-phase precipitates formed während aging bei 480-620°C — enables strength levels unattainable durch conventional martensitic (410, 420) oder austenitic (304, 316) grades. 17-4PH ist der meiste widely used precipitation-hardening stainless steel, serving in aerospace structural components, pumpe shafts, ventil stems, und food processing ausrüstung.
Heat treatment involves two steps: 1) solution annealing bei 1,040°C für 30 minutes followed durch luft cooling oder öl quenching (transforms zu martensite), und 2) aging bei one von several conditions — H900 (480°C, highest strength), H1025 (550°C, balanced), H1150 (620°C, highest toughness). Condition H900 provides peak strength but mit notch sensitivity in hydrogen environments; H1150 provides der best combination von strength und environmental cracking widerstand. Der material ist weldable in der solution-annealed condition but post-weld aging ist erforderlich zu develop full strength.
Quick Facts
| Kategorie | Edelstahl |
| Norm | AMS 5643 / ASTM A564 |
| Density | 7800 kg/m³ |
| Yield Strength | 1,100-1,240 MPa (Condition H900-H1025) |
| Tensile Strength | 1,310-1,380 MPa |
Global Equivalents & Cross-Reference
| Alternative Norm / Güte | Action |
|---|---|
| UNS S17400 | Compare |
| X5CrNiCuNb16-4 (EN 1.4542) | Compare |
| SUS 630 (JIS) | Compare |
Verwandt Materials
🧮 Material Weight Calculator
Calculate the weight based on this material's density: 7800 kg/m³
Frequently Asked Questions
Was ist der difference zwischen 17-4PH und 15-5PH?
17-4PH und 15-5PH haben nearly identical mechanical properties und corrosion widerstand. Der key difference: 15-5PH ist produced durch vacuum arc remelting (VAR) welche provides cleaner microstructure mit fewer inclusions. 15-5PH ist specified wenn transverse mechanical properties (ductility, impact) sind kritisch — der cleaner microstructure provides superior transverse toughness compared zu 17-4PH.
References & International Standards
- ASTM International. Norm Specifications für Stahl & Metal Alloys. astm.org
- International Organization für Standardization (ISO). Metallic Materials — Cross-Referenz Database. iso.org
- American Iron und Stahl Institute (AISI). Stahl Güte Designations & Equivalents. steel.org
- European Committee für Standardization (CEN). EN Stahl Standards & Numbering System. cencenelec.eu