A
superalloy, or
high-performance alloy, is an
alloy that exhibits several key characteristics: excellent mechanical strength, resistance to
thermal creep deformation, good surface stability and resistance to corrosion or oxidation. The crystal structure is typically
face-centered cubic austenitic. Examples of such alloys are
Hastelloy,
Inconel,
Waspaloy,
Rene alloys, Haynes alloys, Incoloy, MP98T, TMS alloys, and CMSX single crystal alloys.