Definition of Invar in English:


Syllabification: In·var
Pronunciation: /ˈinvär


An alloy of iron and nickel with a negligible coefficient of expansion, used in the making of clocks and scientific instruments.
More example sentences
  • Mr Bebb marvelled judges with a demonstration about Invar, an alloy which does not contract or expand when the temperature changes using nothing but balloons and chit-chat.
  • This includes joining hard-to-weld and exotic materials such as the stainless steels, aluminum, magnesium, copper, beryllium copper, Hastelloy, Inconel, Invar and Kovar, especially in very thin cross sections.
  • Choosing a material with a low coefficient of thermal expansion, such as Invar, is one method for minimizing thermal drift.


early 20th century: abbreviation of invariable.

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