Definitions for "Superalloy"
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