Nilo K Wire is 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.
Catalog No. | NK3517 |
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Size | Customized |
Material | Nickel Alloy |
Shape | Wire |
Nilo K Wire is 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.
Synonym: Kovar, Dilver, and Pernifer 2918.
Chemical Composition | ||
Element | Min % | Max % |
Fe | 53.00 nominal | |
Ni | 29.00 nominal | |
Co | 17.00 nominal | |
Mn | – | 0.5 |
Si | – | 0.2 |
C | – | 0.04 |
Al | – | 0.1 |
Mg | – | 0.1 |
Zr | – | 0.1 |
Ti | – | 0.1 |
Cu | – | 0.2 |
Cr | – | 0.2 |
Mo | – | 0.2 |
Density | 8.16 g/cm³ |
Melting Point | 1450°C |
Inflection Point | 450°C |
Thermal Conductivity | 16.7 W/m•°C |
Coefficient of Expansion | 6.0 µm/m °C (20 – 100°C) |
4.6 – 5.2 µm/m °C (20 – 400°C) |
Glass to metal seals in applications requiring high reliability or resistance to thermal shock, ie. high power transmitting valves
Our Nilo K Wire is carefully handled during storage and transportation to preserve the quality of our product in its original condition.