Nilo K* W.NR: 1.3981
, UNS: K94610 , *Trade name of Special Metals Group of Companies
A Nickel-Iron-Cobalt, controlled expansion
alloy containing 29% Nickel. It's coefficient of expansion
(which decreases with rising temperature to the inflection
point), matches the expansion rate of borosilicate glasses
and aluminia ceramics. Applications include glass to metal
seals in applications requiring high reliability or resistance
to thermal shock, ie. high-power transmitting valves, transistor
leads and heaters and photography flash bulbs.
Approx
Chemical Composition (%)
Ni
Fe
Co
29
53
17
Density
(g/cm3)
8.16
Melting
Point (°C)
1450
Coefficient
of Expansion
6.0 µ m/m °C At 20
- 100°C
4.6-5.2 µ m/m °C At 20 - 400°C
Inflection Point
450° C
Thermal Conductivity
16.7
Heat Treatments
The Nilo alloys are
usually used in the annealed condition (residual cold work
distorts the
coefficients of thermal expansion).
