INVAR (42)
Has the lowest CTE between 20-300 degrees °C.
Also known as N 42, created in 1899 as a variation on INVAR 36 with around 41-42 % of nickel, whereas INVAR 42 has the lowest CTE between 20-300 °C. PHYNICX INVAR 42 is melted under vacuum in general. Applicable norm is ASTM F30.
The chemical composition is: | |
INVAR 42 | |
| Nickel (Ni): 41% | |
| Manganese (Mn): ≤ 0,8% | |
| Iron (Fe): Balance | |
The expansion properties are: | |
INVAR 42 | |
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Typical functions in technologies
- Metal to glass sealing
- Lead frames
- Metal to ceramic sealing
- Spacers
- Malls (composite manufacturing)
Typical industries that apply this material in their technology
- Semiconductor
- Aerospace
- Medical
- Military
- Optical
- Electronics
- Tooling
- Lighting