Waspaloy (AMS 5706): Nickel Superalloy for Turbine Disks to 870°C
AMS 5706 / AMS 5707 · Published: 2026-06-02 · Updated: 2026-06-02
Waspaloy has higher temperature capability than Inconel 718 — rated to 870°C vs 718's 650°C. Named from original application in Pratt & Whitney Wasp engines. For turbine disks, compressor disks, shafts in GE CF6 and Rolls-Royce Trent engines....
Waspaloy has higher temperature capability than Inconel 718 — rated to 870°C vs 718's 650°C. Named from original application in Pratt & Whitney Wasp engines. For turbine disks, compressor disks, shafts in GE CF6 and Rolls-Royce Trent engines. More difficult to forge than 718 due to narrower hot-working window.
Quick Facts
| Category | Nickel Alloy |
| Standard | AMS 5706 / AMS 5707 |
| Density | 8210 kg/m³ |
| Yield Strength | 1,000 MPa (aged) |
| Tensile Strength | 1,275 MPa |
Global Equivalents & Cross-Reference
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Frequently Asked Questions
Waspaloy vs Inconel 718?
Waspaloy for service above 650°C to 870°C. Costs ~2× 718. For applications below 650°C, 718 is more economical and manufacturable.
References & International Standards
- ASTM International. Standard Specifications for Steel & Metal Alloys. astm.org
- International Organization for Standardization (ISO). Metallic Materials — Cross-Reference Database. iso.org
- American Iron and Steel Institute (AISI). Steel Grade Designations & Equivalents. steel.org
- European Committee for Standardization (CEN). EN Steel Standards & Numbering System. cencenelec.eu