Nilo K Wire Description
Nilo K Wire, also known as Kovar Wire, is a nickel-cobalt-iron alloy known for its controlled thermal expansion properties. This alloy is specifically designed to match the thermal expansion of borosilicate glass and certain ceramics, making it ideal for applications requiring precise glass-to-metal or ceramic-to-metal seals. Nilo K is a brand name typically associated with this alloy, though "Kovar" is the more common industry term.
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.