NILO® Alloy K
2.4650 / UNS N07263
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. Used for glass-to-metal seals in applications requiring high reliability or resistance to thermal shock. Examples are high-power transmitting valves, transistor leads and headers, integrated-circuit lead frames, and photography flash bulbs.
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- 4.75 mm
Details at a glance
Chemical composition
Fe¹
53.00 %
Ni¹
29.00 %
Co¹
17.00 %
Mn
max. 0.50 %
Cr
max. 0.20 %
Cu
max. 0.20 %
Mo
max. 0.20 %
Si
max. 0.20 %
Al
max. 0.10 %
Mg
max. 0.10 %
Ti
max. 0.10 %
Zr
max. 0.10 %
C
max. 0.04 %
¹ Nominal value; adjusted to meet expansion requirements
Density
g/cm³
8.16
lb/in³
0.295
Recommended Welding Products
Electrode
Nickel 141
Electrode
INCO WELD A
Electrode
INCO WELD B
Filler Metal
Nickel 61
Filler Metal
INCONEL 82
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