Explanation
It is a high temperature alloy with very low expansion coefficient. It has the characteristics of both low expansion alloy and high temperature alloy. A typical low expansion alloy is a Fe Ni alloy containing 36% Ni, namely Invar alloy. In addition, low thermal expansion superalloy has good thermal fatigue performance, high hot working plasticity, and almost constant elastic modulus.
Classification
Metals -> Special purpose metals -> Superalloys