Explanation
Also known as Invar alloy, it is a alloy whose size almost does not change with temperature within a certain temperature range. According to application and characteristics, it can be divided into stainless invar, high-strength invar, free cutting invar, high-temperature invar, non iron Invar alloy, etc. According to composition, it can be divided into Fe Ni system, Fe Ni Co system, F-Co Cr system, Fe Pt system, Fe Pd system, and amorphous Fe B system.
Classification
Metals -> Metallic functional materials -> Expansion alloys