NK3517 Nilo K Wire

Catalog No. NK3517
Size Customized
Material Nickel Alloy
Shape Wire


Nilo K Wire Description

Nilo K WireNilo 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.

Nilo K Wire Specifications

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)


Nilo K Wire Applications

Glass to metal seals in applications requiring high reliability or resistance to thermal shock, ie. high power transmitting valves

Nilo K Wire Packaging

Our Nilo K Wire is carefully handled during storage and transportation to preserve the quality of our product in its original condition.

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