Waspaloy®
Waspaloy is an age-hardenable, nickel-based superalloy with excellent high-temperature strength and good corrosion resistance by oxidation. It is used for critical rotating applications at temperatures up to 1600°F (870°C), where it outperforms Inconel 718.
- Common Forms: Round Bar, Forgings, Wire, Sheet.
- Key Feature: Superior strength at temperatures >1300°F.
- Composition: High levels of Cobalt (13%) and Molybdenum.
- Hardening: Age-hardened via Titanium and Aluminum precipitation.
Waspaloy is the upgrade path for aerospace engineers when Inconel 718 is not enough. While Inconel 718 loses strength rapidly above 1300°F, Waspaloy retains high yield strength and creep-rupture properties up to 1600°F. This makes it the standard for the hottest sections of jet engine turbines.
Critical Rotating Parts
The material of choice for jet engine turbine discs and shafts that spin at high RPMs in extreme heat.
Oxidation Resistance
Excellent resistance to oxidation and gas turbine combustion environments at temperatures as high as 1750°F (954°C).
Thermal Stability
The addition of Cobalt and Molybdenum provides solid-solution strengthening that remains stable during prolonged heat exposure.
| Element | Content (%) |
|---|---|
| Nickel (Ni) | Balance (approx. 58%) |
| Chromium (Cr) | 18.0 - 21.0 |
| Cobalt (Co) | 12.0 - 15.0 |
| Molybdenum (Mo) | 3.5 - 5.0 |
| Titanium (Ti) | 2.75 - 3.25 |
| Aluminum (Al) | 1.2 - 1.6 |
| Carbon (C) | 0.02 - 0.10 |
*Note: The Ti+Al combination is critical for the gamma prime strengthening phase.
| Product Form | Standards (AMS) |
|---|---|
| Bar, Forgings, Rings | AMS 5706, AMS 5707, AMS 5708, AMS 5709 |
| Sheet, Strip, Plate | AMS 5544 |
| Wire (Welding) | AMS 5828 |
| Property | Typical Values (Room Temp) |
|---|---|
| Tensile Strength | 175 - 195 ksi (1205 - 1345 MPa) |
| Yield Strength (0.2% Offset) | 115 - 130 ksi (790 - 895 MPa) |
| Elongation | 20 - 25 % |
| Hardness (Brinell) | 340 - 390 HB |
| Creep Rupture (1500°F) | High stress to rupture @ 100 hours |
*Note: Properties are dependent on the specific solution and aging heat treatment cycle (e.g., AMS 5708).
Gas Turbine Discs
Compressor and turbine discs, shafts, and spacers requiring high tensile strength at 1200-1600°F.
Aerospace Fasteners
High-strength bolts and fasteners used in the hot sections of engines and airframes.
Seals and Rings
Turbine seals and casings that must maintain dimensional stability under thermal stress.
Missile Systems
Structural components exposed to high aerodynamic heating and propulsion exhaust.
Need Waspaloy Forgings or Bar?
We maintain inventory of Vacuum Induction Melted (VIM) / Vacuum Arc Remelted (VAR) Waspaloy. Full aerospace certification provided.
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