A nickel-chromium aged-hardenable superalloy, WASPALOY® offers excellent high temperature strength and oxidation resistance.

With the addition of aluminium and titanium, WASPALOY® has excellent strength at temperatures up to 650°C for critical gas turbine engine applications and good oxidation resistance for non-rotating parts in gas turbine applications up to 870°C.

  • UNS Number: N07001
  • Werkstoff Number: 2.4654
  • AMS: 5544, 5828, 5708

Product availability

Round Bar
Welding Wire

Chemical analysis



  • Shafts
  • Fasteners
  • Compressors and rotor discs
  • Spacers, seals, rings and casings
  • Airframe assembly and missile systems


WASPALOY® is an alloy of choice for both rotating and non-rotating parts in aerospace gas turbines due to its high strength and oxidation resistance at elevated temperatures.

Welding of WASPALOY® is difficult and best performed on material in the solution annealed condition. Limiting the amperage whilst minimising the fusion zone, combined with rapid cooling from welding, is necessary to minimise aging stresses. After welding, the fabrication should be solution treated, using rapid heating and cooling rates through the aging range. This should be followed by a stabilisation and aging treatment.

Waspaloy® is the registered trademark of United Technologies Corp.

  • Density: 8.193 g/cm³
  • Melting range: 1328-1357°C

Mechanical & Physical Properties

Mechanical & Physical Properties204°C538°C649°C760°C871°C982°C
Coefficient of Thermal Expansion µm/m⁰C12.61414.615.11617.5
Thermal Conductivity /kcal/(hr.m.°C)10.915.517.31920.7-
Modulus of Elasticity/ x105 MPa2.071.861.791.651.591.45

Typical Rupture Strength, Heat Treated, Sheet

Temperature °C649°C704°C760°C816°C871°C
100 hours, ksi9275533218
1,000 hours, ksi8057351910
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