Kovar Tube

Alloy K / K94610 / ASTM F15 Also known as Kovar®*** and Nilo K**, this alloy contains 29% nickel with a 17% cobalt addition. Its composition is tightly controlled within narrow limits to ensure precise and universal thermal expansion and mechanical characteristics. This helps the material provide high integrity glass-to-metal and ceramic-to-metal seals in applications requiring reliability and resistance to thermal shock. Alloy K is often used for the manufacture of hermetic seals with both the harder Pyrex or borosilicate glasses and alumina-type ceramic materials. It finds extensive application in the production of transistors and diodes for lids and closures in a variety of hybrid electronic circuit packages and also in the manufacture of microwave tubes.

Main Application:

Matching sealing in electric vacuum industry and hard glass

Main features:

Linear expansion coefficient similar to hard glass in a certain temperature range

Material

Content Composition %

Physical properties

Average linear expansion coefficient