NILO K   1.3981   UNS K94610

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.

Chemistry By % Weight

C: 0.02% Max

Co: 17%

Fe: Balance

Mn: 0.3%

Ni: 29%

Si: 0.2%

Applications

Power tubes, microwave tubes, transistors, diodes, hybrid packages, and other kinds of scientific instruments.

Available Product Forms: Tube, strip and sheet, wire and round bar, etc.