An alloy, usually based on nickel, cobalt or iron, developed for high temperature service where relatively severe mechanical stressing is encountered and where high surface stability is frequently required.
Nickel-, cobalt- or iron-base alloys having strengths superior to any alloys in the AISI 300 series at temperatures over 922 K (649ยบ C) under severe environmental and operating conditions.
see high-performace alloy
The highest performance alloys used for the most demanding applications. Typically these are formulated with a wide range of components, based on nickel, with tailored properties that allow use in moving components in jet turbines.
An alloy developed for very high temperature use where relatively high stresses are encountered and where oxidation resistance is needed. See Alloy.
A superalloy, or high-performance alloy, is an alloy able to withstand extreme temperatures that would destroy conventional metals like steel and aluminum. Superalloys exhibit excellent mechanical strength and creep resistance at high temperatures, good surface stability, and corrosion and oxidation resistance. Superalloys typically have a austenitic face-centered cubic crystal structure.