Super Invar 32-5

Technical Data Sheet


Chemical Composition Limits
Weight% C Si Co Mn Ni Fe
Super Invar 32-5 0.02 0.25 5.50 0.40 32 Bal

Super Invar 32-5 is a magnetic, austenitic, solid solution alloy containing iron, nickel and cobalt. 32-5 was originally designed to provide minimum thermal expansion at room temperatures. It has the austenite stability to service temperatures at least -67°F (-55°C). Super Invar 32-5 has less thermal expansion properties than Invar 36.

Super Invar 32-5 is used in structural components for supports and substrates in optical and laser systems requiring precision measurements.

Typical Mechanical Properties


Material 0.2% Yield Strength Ultimate Tensile Strength Hardness Rockwell B
Hardness Rockwell B
Cold Worked
ksi MPa ksi MPa
Super Invar 32-5 40 276 70 483 75 90

Technical Data

Physical Properties
Specific Gravity - 8.15
Density - 0.2940 lb/in ³
Mean CTE - -67 to 203°F / 0.350 x 10-6 in/in°F

Super Invar 32-5 is available in bar, bar flats, bar square, bar rounds, strip, billet, wire. For all stock availability contact Sales for further availability.


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Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.