Precipitation-hardened nickel-based superalloy with exceptional high-temperature strength and creep resistance up to 870°C (1600°F). The premier choice for jet engine turbine discs and critical gas turbine rotating components.
Waspaloy is a precipitation-hardened nickel-based superalloy developed by Pratt & Whitney for jet engine applications. It offers exceptional high-temperature strength, excellent creep resistance, and good corrosion resistance up to 870°C (1600°F). Named after its original application in the Wasp engine, Waspaloy has become one of the most important superalloys for rotating components in jet engines and industrial gas turbines.
FountainHead Alloys supplies Waspaloy in bars, sheets, forgings, and custom forms. With full mill test certificates, NACE compliance, and exports to 60+ countries, we are your trusted source for this critical aerospace superalloy.
Request a QuoteWaspaloy available in all standard and custom product forms to meet your project specifications.
Hot rolled, cold drawn, forged. 6mm to 500mm dia.
Hot rolled, cold rolled. 0.5mm to 100mm thick.
Seamless & welded. 6mm to 600mm OD.
Weld neck, slip-on, blind, socket weld, lap joint.
Bolts, nuts, studs, screws, washers. All standards.
Open die, closed die, rings, discs. Custom shapes.
Waspaloy is a precipitation-hardened nickel-based superalloy strengthened by gamma prime (Ni₃(Al,Ti)) precipitates. Developed for the most demanding rotating components in jet engines, it delivers outstanding tensile and creep-rupture strength at temperatures up to 870°C (1600°F), combined with excellent oxidation resistance and good fatigue life. Waspaloy is specified by all major aero-engine OEMs including Pratt & Whitney, GE Aviation, and Rolls-Royce for turbine disc and compressor disc applications.
| Ni | Cr | Co | Mo | Ti | Al | Fe | C | Mn | Si | Cu | Zr | B | P | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 54.0 min (bal) | 18.0 - 21.0 | 12.0 - 15.0 | 3.5 - 5.0 | 2.75 - 3.25 | 1.2 - 1.6 | 2.0 max | 0.02 - 0.10 | 0.10 max | 0.15 max | 0.10 max | 0.02 - 0.12 | 0.003 - 0.010 | 0.015 max | 0.015 max |
| Property | Value |
|---|---|
| Tensile Strength | 1275 MPa min (185 ksi) |
| Yield Strength (0.2% Offset) | 795 MPa min (115 ksi) |
| Elongation (in 50mm) | 25% min |
| Hardness | 30 - 44 HRC |
| Property | Value |
|---|---|
| Density | 8.19 g/cm³ |
| Melting Range | 1330 - 1360 °C (2425 - 2480 °F) |
| Thermal Conductivity (at 20°C) | 11.7 W/m·K |
| Standard | Designation |
|---|---|
| UNS | N07001 |
| W.Nr (DIN) | 2.4654 |
| AMS | 5544 / 5706 / 5707 / 5708 / 5709 |
| ASTM | B637 |
| GE | B50TF12 / B50TF14 |
| PWA (Pratt & Whitney) | 679 / 1007 |
India's trusted source for aerospace-grade Waspaloy with decades of proven expertise.
ISO certified with full mill test certificates (EN 10204 3.1), NACE MR0175 compliance, and third-party inspection available on request. All material supplied with complete traceability to meet aerospace specifications.
Extensive inventory of Waspaloy in round bars, sheets, forgings, and fasteners for immediate dispatch from our Mumbai warehouse. Multiple sizes and conditions available ex-stock.
Exporting Waspaloy to 60+ countries across the Middle East, Europe, Southeast Asia, Africa, and the Americas with reliable logistics support and custom packaging for aerospace-grade materials.
Common questions about Waspaloy answered by our technical team.
Waspaloy is primarily used in jet engines and gas turbines for critical rotating components including turbine discs, compressor discs, shafts, spacers, and seal rings. These components operate under extreme stress at temperatures up to 870°C. It is also used in power generation gas turbines, nuclear reactor components, and other high-temperature structural applications where exceptional creep strength and fatigue resistance are required. Major aerospace OEMs including Pratt & Whitney, GE Aviation, and Rolls-Royce specify Waspaloy for their engine programs.
Both are precipitation-hardened nickel superalloys used in gas turbines, but they differ in key aspects. Waspaloy has superior creep strength above 650°C and better oxidation resistance, making it preferred for turbine disc applications at higher temperatures. Inconel 718 has higher room-temperature strength (1241 MPa vs 1275 MPa tensile, but 1034 vs 795 MPa yield), better machinability, and lower cost. Inconel 718 dominates below 650°C and where machinability matters, while Waspaloy is the choice for the hottest turbine disc sections.
Waspaloy can be welded, but it is considered moderately difficult to weld due to its high aluminum and titanium content which makes it susceptible to strain-age cracking. Electron beam welding and GTAW (TIG) with careful pre-heat (150-200°C) and controlled interpass temperatures are the preferred methods. Matching filler wire or Inconel 625 filler can be used. Post-weld heat treatment including solution annealing and aging is typically required. Specialized welding procedures developed for Waspaloy should be followed to ensure joint integrity.
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