Waspaloy (UNS N07001/W.Nr.2.4654) is a nickel-based superalloy with aging hardening properties, offering exceptional high-temperature strength and corrosion resistance. It performs exceptionally well in critical rotating applications at service temperatures up to 1200°F (650°℃), as well as in less demanding scenarios reaching 1600°F (870°℃). The alloy’s superior high-temperature strength originates from its solid solution strengthening elements—molybdenum, cobalt, and chromium—alongside its aging hardening components: aluminum and titanium. Its strength and stability range surpass those of the commonly used Alloy 718.
Special metal Waspaloy is used in gas turbine engine components that require significant strength and corrosion resistance at high temperatures. Current and potential applications include compressor blades and rotor discs, shafts, gaskets, seals, rings, casings, fasteners, and various other engine hardware, frame assemblies, and missile systems. The alloy demonstrates excellent oxidation resistance under frequent thermal cycling conditions and performs well when continuously exposed to temperatures up to 1900°F (1038°℃). It shows good performance in the atmosphere and salt spray environments commonly encountered in gas turbine engine applications. The solution-treated material provides optimal corrosion resistance levels.
The density of the alloy is ρ=8.19/cm³.
Waspaloy is generally considered a material that is difficult to weld under very strict controlled conditions, but can be welded using an argon arc method with matching composition filler metals. Heavy-section plates, thin plates, and tube joints can all be welded using gas shielded non-consumable arc welding. After heat treatment, the high-temperature strength of the weld is lower than that of heat-treated forgings. Therefore, welding should be avoided in high-stress areas. This alloy may exhibit “thermal shortness” characteristics and shows certain sensitivity to strain cracking. It is recommended that welding materials only be in solution-treated state before welding, and all welded components should undergo re-solution treatment before being put into service.
