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 Annealed |
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
Availability
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.