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Home Material Sciences Hardened INVAR Fe-Ni-C-based Alloys

Hardened INVAR Fe-Ni-C-based Alloys


The Invar Fe-Ni-X-C-based alloys have been developed on the basis of the results of studies, which for stability of thermal expansion in the temperature range of 100 – 400 K do not yield to the traditional Fe-Ni Invar and additionly demontrste edvantagous combination of the mechanical, fatigue and elinvar properties.

Innovative Aspect and Main Advantages

  • low thermal expansion coefficient α (TEC)
  • advantage combination of strength and plasticity;
  • resistance to cyclic loads;
  • possibility to change and renew TEC on products.

Areas of Application

  • dilatometry;
  • parts for ultrasonic delay line;
  • laser optics;
  • telescope body constructions;
  • parts for tanks for transportation of liquid gases;
  • clock and watches;
  • radio frequency resonant cavity;
  • electronics.

Low temperature dilatometer.
Fig. 1 Low temperature dilatometer

Low temperature dilatometer.
Fig. 2 Main metallic parts was manufactured from
developed Invar alloy

Stage of Development

Metallic sound guide manufactured from Invar alloy in equipment for measurements of ultrasonic velocity.

Contact Details

G.V. Kurdyumov Institute for Metal Physics, NAS of Ukraine
Contact person: Vladimir. M. Nadutov, Dr. Sc., Prof.
Address: 36, Vernadsky Str, 03680, Kyiv, Ukraine
Tel./Fax: (+38 044) 424 3305, (+38 044) 424 3412
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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