Waspaloy (UNS N07001) is a classic high-strength wrought nickel-chromium-cobalt superalloy, strengthened by molybdenum in solid solution and by aluminum and titanium, which form the gamma-prime (Ni3(Al,Ti)) precipitates responsible for its retained strength at high temperature. Developed in the 1950s for gas turbine engines, Waspaloy was the dominant turbine disc material of its era and remains historically significant as the principal pre-Inconel 718 aerospace disc alloy - it predates 718's rise to dominance and is still specified today where its balance of strength, creep resistance, and good weldability/fabricability is preferred over more highly alloyed grades.

The alloy is used up to roughly 650°C/1200°F in critical rotating hardware: turbine discs, shafts, spacers, seals, rings, casings, and high-temperature fasteners in gas turbine engines, as well as in missile systems and other demanding aerospace airframe assemblies. Waspaloy is supplied and machined predominantly in the solution-treated-and-aged condition, where its gamma-prime strengthening gives it hardness and hot strength comparable to other precipitation-hardened nickel superalloys such as Inconel 718.

Waspaloy shares the core machining difficulties of the nickel-superalloy family. Its low thermal conductivity keeps heat from dissipating into the chip and workpiece, so it concentrates at the tool-chip interface and accelerates crater wear and edge deformation. The same gamma-prime precipitates that give the alloy its strength also drive rapid work hardening in the cut - any rubbing, hesitation, or light pass burnishes a hardened layer into the surface that resists the next cut more than the parent material did.

Because Waspaloy retains most of its strength and hardness at elevated temperature rather than softening the way steel does, the cutting edge stays under heavy mechanical load even as heat builds up, which promotes notching and edge chipping at aggressive speeds. The alloy's affinity for common tool materials also makes it prone to galling and built-up edge, tearing the finished surface and shortening tool life. Rigid, vibration-free setups, sharp positive-rake carbide with a wear-resistant coating, feed rates sufficient to cut beneath the previous pass's work-hardened layer, and moderate-to-low cutting speeds are the standard countermeasures - broadly the same approach used for Inconel 718 and comparable precipitation-hardened nickel superalloys of similar hardness.