Englisch - Englisch
Definition von invar im Englisch Englisch wörterbuch
- an alloy of iron containing 35.5% nickel, and having a very low coefficient of expansion
- an alloy of iron and nickel having a low coefficient of thermal expansion; used in tuning forks and measuring tapes and other instruments
- Trademark name for an alloy of iron (64% iron, 36% nickel) that expands very little when heated. Invar was formerly used for absolute standards of length measurement and is now used for surveying tapes and in watches and various other temperature-sensitive devices. The name expresses the invariability of its dimensions. It was developed by Charles-Édouard Guillaume (1861-1938), winner of the 1920 Nobel Prize for Physics