Invar® Applications | EFINEA

Over 100 Years and the Invar Applications Continue to Grow

Invar is a nominal 36% nickel-iron alloy with a rate of thermal expansion approximately one-tenth of carbon steel at temperatures up to 400°F.  This controlled expansion alloy is used in applications such as measurement and electronic devices where dimensional changes due to temperature must be minimal.  Below are examples of Invar applications that have benefited from the outstanding properties this alloy provides

  • Advanced composite molds for aerospace industry
  • Bimetal thermostats
  • Clock balance wheels
  • Containers and transfer lines for LNG tankers
  • CRT applications: shadow masks, deflection clips, and electron gun components
  • Deflection clips
  • Dimensionally stable instruments and optical devices
  • Echo boxes and filters for mobile telephones
  • Electrical circuit breakers
  • Electrical transformers
  • Electron gun components
  • High voltage transmission lines
  • Laser components
  • Magnetic shielding
  • Metrology devices
  • Optical benches
  • Pendulum clocks
  • Positioning devices
  • Precision condenser blades
  • Radar and microwave cavity resonators
  • Scientific instruments
  • Seals, spacers, and specialized frames
  • Small electrical transformers
  • Special electronic housings
  • Temperature regulators
  • Transfer lines for LNG


Rely on EFINEA as your source for high-quality, certified controlled expansion alloys like Invar®.  We stock Invar alloy in the various forms and sizes customers require and standard stock items are available for immediate shipment.

For more information on technology, engineering and advanced materials applications, you can visit the IEEE, one of the largest technical professional organizations worldwide.