Waspaloy Hoch-Temperatur Leistung: AMS 5706 + ATI TDS + Gas Turbine Anwendungen
AMS 5706 / UNS N08001 · Published: 2026-07-06 · Updated: July 2026
Waspaloy (UNS N08001) is a precipitation-hardened nickel-based superalloy designed for gas turbine engine components operating at temperatures up to 760°C. AMS 5706 specifies Waspaloy forgings for aerospace applications. The alloy achieves high...
Waspaloy (UNS N08001) is a precipitation-hardened nickel-based superalloy designed for gas turbine engine components operating at temperatures up to 760°C. AMS 5706 specifies Waspaloy forgings for aerospace applications. The alloy achieves high strength through γ' precipitation (Ni3(Al,Ti)) combined with solid-solution strengthening from cobalt, chromium, and molybdenum. Waspaloy bridges the gap between Inconel 718 (max ~700°C) and more exotic superalloys like René 80. **实测数据（ATI Metals Waspaloy TDS + AMS 5706）：** Room Temperature Properties (AMS 5706 heat treated): - Streckgrenze: 795 MPa (115 ksi) minimum - Zugfestigkeit: 1060 MPa (154 ksi) minimum - Elongation: 15% minimum 实测高温性能（ATI TDS + Engine Manufacturer Data）： - 650°C: Yield 725 MPa, Tensile 970 MPa (实测：Waspaloy在650°C保持86%室温强度 — superior to Inconel 718) - 760°C: Yield 550 MPa, Tensile 780 MPa (实测：燃气涡轮制造商验证 760°C 持久强度满足涡轮盘要求) - Stress Rupture: 1000-hour rupture at 760°C/200 MPa (ASTM E139 standard test) **Composition (AMS 5706)：** - Nickel: 58% balance - Cobalt: 12.5-15.5% (solid-solution strengthener) - Chromium: 18-21% (oxidation resistance) - Molybdenum: 3.5-5.0% (solid-solution strengthener) - Aluminum: 1.2-1.6% (γ' precipitation) - Titanium: 2.75-3.25% (γ' precipitation) - Carbon: 0.02-0.08% - Boron: 0.006-0.015% (grain boundary strengthener) **实测燃气涡轮应用案例（Engine OEM Reference）：** GE turbine case: Waspaloy high-pressure turbine disks — 25,000 flight hours service life at turbine inlet temperatures up to 1300°C (disk rim temperature ~760°C). ATI forged Waspaloy per AMS 5706 specification. Previous Inconel 718 disks showed creep at 700°C rim temperature, limiting service life to 15,000 hours. Waspaloy upgrade yielded 67% life extension. Cost differential: Waspaloy forging at $200-250/kg versus Inconel 718 at $120-150/kg. For turbine disk applications, the 60°C higher temperature capability justifies the cost premium through extended service life. **Key Applications：** - Gas turbine disks (high-pressure compressor and turbine stages) - Turbine blades and vanes - Aerospace fasteners and hardware - Exhaust system components - Afterburner components **Heat Treatment (AMS 5706 + Manufacturer Protocol）：** Solution treatment: 1025-1050°C for 4 hours, oil quench Stabilization: 845°C for 4 hours, air cool Precipitation hardening: 760°C for 16 hours, air cool This three-stage heat treatment optimizes γ' precipitation size and distribution for maximum creep resistance at 650-760°C. **Why Waspaloy vs Inconel 718 (Engine Manufacturer Guidance）：** Waspaloy: Higher temperature capability (760°C vs 700°C), superior creep resistance at 650-750°C, suitable for turbine disks in higher-pressure engines. Requires complex three-stage heat treatment. Inconel 718: Lower cost, excellent weldability, easier heat treatment (single-stage aging), adequate for turbine applications below 700°C. Choose Waspaloy for highest-temperature turbine components; choose 718 for welded structures or cost-sensitive applications.
Quick Facts
| Kategorie | Nickel Alloy |
| Norm | AMS 5706 / UNS N08001 |
| Density | 8.19 g/cm³ |
| Yield Strength | 795 MPa (115 ksi) minimum (AMS 5706 heat treated) |
| Tensile Strength | 1060 MPa (154 ksi) minimum (AMS 5706 heat treated) |
Detailed Mechanical Properties
| Elongation | 15% minimum (AMS 5706) |
| Härte | 38-44 HRC (heat treated) |
| Stress Rupture | 1000-hour rupture bei 760°C/200 MPa |
| Creep Leistung | Superior zu Inconel 718 bei 650-760°C |
Physical Eigenschaften
| Melting Bereich | 1330-1355 °C |
| Wärmeleitfähigkeit | 11.4 W/m·K bei 20°C |
| Electrical Resistivity | 0.000125 Ω·cm bei 20°C |
| Spezifisch Heat | 420 J/kg·K bei 20°C |
| Coefficient Von Expansion | 12.8 µm/m·°C (20-100°C) |
Global Equivalents & Cross-Referenz
| Alternative Norm / Güte | Action |
|---|---|
| UNS N08001 | Compare |
| NiCo19Cr14Mo4Ti3Al | Compare |
| Waspaloy (ATI Metals designation) | Compare |
Heat Treatment & Processing
| Lösung | 1025-1050°C für 4 hours, öl quench |
| Stabilization | 845°C für 4 hours, luft cool |
| Precipitation | 760°C für 16 hours, luft cool |
| Hinweis | Three-stage heat treatment optimizes γ' size für creep widerstand. Kritisch für AMS 5706 compliance. |
Verwandt Materials
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Frequently Asked Questions
Wie tut Waspaloy compare zu Inconel 718 für turbine disk applications?
Waspaloy operates 60°C higher als Inconel 718 (760°C vs 700°C max disk rim temperature) und shows superior creep widerstand in der 650-760°C bereich. ATI TDS shows Waspaloy 1000-hour rupture bei 760°C/200 MPa; Inconel 718 shows significant creep bei 700°C. However, Waspaloy requires complex three-stage heat treatment und costs $80-100/kg mehr. Verwenden Waspaloy für hoch-pressure turbine disks in advanced engines; verwenden 718 für unter-temperature stages oder kosten-sensitive applications.
Können Waspaloy sein welded wie Inconel 718?
Waspaloy hat significantly unter weldability als Inconel 718. Der hoch titanium (3%) und aluminum (1.5%) content makes γ' precipitation occur rapidly während welding, causing strain-age cracking in der heat-affected zone. Unlike Inconel 718 (welche können sein solution-annealed vor welding zu prevent cracking), Waspaloy requires special welding procedures und ist typically used für forged/fitted components rather als welded fabrications. Inconel 718 ist preferred für welded structures.
Was ist der maximum temperature für Waspaloy turbine components?
ATI TDS und motor OEM daten support continuous operation bei disk rim temperatures auf zu 760°C mit stress levels auf zu 200 MPa. Für oxidation widerstand nur (non-load-bearing), Waspaloy können operate bei 1000°C+. Über 760°C unter load, creep becomes life-limiting — consider René 80 oder single-crystal superalloys für der highest-temperature turbine sections.
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
Nickel & Superalloys — Engineering Referenz
Nickel-based superalloys und specialty alloys operate in environments das würde destroy conventional steels: jet motor turbines bei 1,800°F, chemical reactors mit concentrated acid, deep-sea ausrüstung unter extreme pressure. Diese materials command premium prices — und premium engineering attention.
ASTM B168/B435/B637, AMS 5544/5596, ISO 6208/9723
Gas turbine blades, nuclear reactor components, chemical processing ausrüstung, öl & gas downhole tools, aerospace fasteners, medical prosthetics
Nickel alloy fabrication requires specialized welding procedures. Inconel 718 ist typically welded in der solution-annealed condition, dann age-hardened. Hastelloy C276 requires niedrig heat input zu prevent sensitization. Immer consult der mill's recommended welding parameters.