ASTM F15 Certified Iron-Nickel-Cobalt Sealing Alloy Kovar (4J29)
Description:
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.
Available Product Forms: Tube, strip and sheet, plate, wire and round bar, capillary tube, etc.
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.
Forms:
We can supply these products in all forms including wire, ribbon, strip, sheet and foil. You also can send your custom Dimensions and Tolerances by email or phone us.
Tel. & Fax: 0086-519-89986880
WeChat & WhatsApp: +86 17768786989
E-mail: david@brilliance-alloy.com
Postal Code: 213131
Address: Longfu Town, Xinbei District, Changzhou City, Jiangsu Province, China
Website: www.brilliance-alloy.com
Packing
