Waspaloy
2.4654Nickel-based gamma-prime strengthened superalloy — THE turbine disc material. Excellent creep-rupture strength up to 650°C (rotating) and 870°C (static). Developed 1950s by Pratt & Whitney. Triple-aged (solution + stabilize + precipitation) for peak properties. Superior to Inconel 718 above 650°C. Used for compressor and rotor discs, shafts, spacers, seals, rings, casings, and fasteners in gas turbine engines.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS N07001 | N07001 | REF |
| 🇪🇺 | EN | Europe | NiCr20Co13Mo4Ti3Al / 2.4654 | 2.4654 | 100% |
| 🇺🇸 | AMS | USA | AMS 5544 (sheet) / AMS 5706 (bar) | — | 100% |
Sources: ASTM B637, EN ISO 9723, AMS 5706
Mechanical properties
Compatibility verdict
Waspaloy and NiCr20Co13Mo4Ti3Al / 2.4654: 100% composition match
Related materials
Inconel 625
2.4856Nickel-chromium-molybdenum-niobium superalloy. Solid-solution strengthened (no precipitation hardening required). Outstanding corrosion resistance from cryogenic to 982°C. Used for jet engine exhaust systems, marine components, chemical processing, flare stacks, and nuclear applications.
Hastelloy C-276
2.4819The most versatile corrosion-resistant alloy available. Ni-Mo-Cr-W composition resists both oxidizing and reducing environments. Outstanding resistance to pitting, stress corrosion cracking, and wet chlorine gas. Used in chemical processing, flue gas desulfurization, pulp & paper, and waste treatment.
Monel 400
2.4360Nickel-copper alloy with excellent resistance to seawater, hydrofluoric acid, and alkaline environments. One of the few alloys resistant to HF acid at all concentrations. Used for marine engineering, chemical processing, oil refinery piping, and valve/pump components.
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