Invar 36®

Invar 36® is a registered trademark of Carpenter Technology Corporation.

Chemistry By % Weight

C 0.02%
Fe Balance
Mn 0.35%
Ni 36%
Si 0.2%

Typical Mechanical Properties

Ultimate Tensile Strength 104,000 PSI
Yield Strength 98,000 PSI
Elongation @ Break 5.5
Modulus of Elasticity 21,500 KSI

Typical Physical Properties

Density 0.291 lbs/cu in
Melting Point 1425° C
Electrical Resistivity @ RT 8.2 Microhm-cm
Thermal Conductivity @ RT 10.15 W/m-k

Invar36® is a 36% nickel-iron alloy that has a rate of thermal expansion approximately 1/10 that of carbon steel up to 200° C. It is typically used in applications where dimensional changes due to temperature must be minimal such as radio and electronics, aircraft controls and laser systems, etc. It has also been used in combination with high expansion alloys where motion is desired during temperature changes for bimetallic thermostats and temperature regulators.


H. Cross Company can provide Invar36 in wire, ribbon, strip, sheet and foil sizes to suit your particular needs. Please refer to our Typical Dimension and Tolerances page for general size ranges of products. If you do not see your required size list contact us via email or phone for further information or assistance.