Invar Tape. In this photograph, surveyors use an invar tape to measure a base line through a house in Pasadena, California. Invar, an alloy of nickel and steel.
Bimetallic strip: Brass/invar strip curves when heated. Invar is a steel-like alloy of nickel and iron containing 36% nickel. It is employed in the manufacture of.
Invar® - Controlled Expansion Alloy (Fe64/Ni36) - Foil - Material Information Uses include balance wheels for clocks and watches, bi-metal strip.