Nilo K (For Springs)
A Nickel-Iron-Cobalt, controlled expansion alloy containing 29% Nickel. Its coefficient of expansion (which decreases with rising temperature to the inflection point), matches the expansion rate of borosilicate glasses and alumina ceramics.
Nilo K is also known as Kovar, Dilver, and Pernifer 2918.
Nickel-Iron-Cobalt Base Wire for wire springs, flat springs and wire products
Key Features
- Controlled coefficient of expansion (which decreases with rising temperature to the inflection point).
- Matches the expansion rate of borosilicate glasses and alumina ceramics.
Typical Applications
Glass to metal seals in applications requiring high reliability or resistance to thermal shock, ie. high power transmitting valves.
Approx. Operating Temperature
Chemical Composition
| Element | Ni | Cr | Fe | Mn | C | Cu | Si | Co | Ti | Al | Mo | Mg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min % | 29.00 nominal | – | 53.00 nominal | – | – | – | – | 17.00 nominal | – | – | – | – |
| Max % | 0.20 | 0.50 | 0.04 | 0.20 | 0.20 | 0.10 | 0.10 | 0.20 | 0.10 |
Wire Type
- Round
- Flat Wire
- Shaped Wire
- Rope/Strand
Specifications
- ASTM F15
Designations
- W.NR 1.3981
- UNS K94610
- AWS 094
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