Up to 80 % - lower CTE than INVAR 36.

Discovered many years later than INVAR, SUPERINVAR has an - up to 80 % - lower CTE than INVAR 36. PHYNICX has developed an optimal analysis of this alloy and the required annealing treatments to avoid creep and phase transformation, relatively often occurring after hot or cold forming.

The chemical composition of this alloy is:


Nickel (Ni): 32%
Cobalt (Co): 5%
Iron (Fe): Balance

The expansion coefficient is:


20-100°C [x10-6/K]≤ 0,8

Typical functions in technologies

  • Construction (LNG carriers)
  • Bimetals
  • Thermally stable precision parts
  • Spacers
  • Frames
  • Malls (composite manufacturing)
  • Chambers or positioning frames

Typical industries that apply this material in their technology

  • Laser technology
  • Semiconductor
  • Aerospace
  • Medical
  • Cryogenics
  • Military
  • Optical
  • Packaging
  • Electronics
  • Automotive

Available delivery forms