Invar 36 (FeNi36) / 1.3912


Invar 36 (FeNi36) / 1.3912

Invar 36 is a nickel-iron, low expansion alloy that contains 36% nickel and possesses a rate of thermal expansion approximately one-tenth that of carbon steel. Alloy 36 maintains nearly constant dimensions over the range of normal atmospheric temperatures, and has a low coefficient of expansion from cryogenic temperatures to about 500°F. This nickel iron alloy is tough, versatile and retains good strength at cryogenic temperatures.

 

Invar 36 is used mainly for:

  • Aircraft controls
  • Optical & laser systems
  • Radio & electronic devices
  • Composite forming tools & dies
  • Cryogenic components

Chemical composition of Invar 36

Ni C Si Mn S
35.5 – 36.5 0.01 max 0.2 max 0.2 – 0.4 0.002 max
P Cr Co Fe
0.07 max 0.15 max 0.5 max Balance