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Kovar, a Controlled Expansion and Nickel-Iron Alloy
Kovar Alloy, also known as ASTM F15, NILO K, Pernifer 2918, Rodar and Dilver P1 is a controlled expansion alloy. It is a Nickel-Iron alloy with 29% Nickel, 17% Cobalt and the remaining balance is Iron. The expansion characteristics of Kovar match both borosilicate (Pyrex) glass and alumina ceramics, making it one of the most popular of the controlled expansion alloys for hermetic sealing applications. Kovar is produced to ensure good properties for machining and deep drawing, and is a porosity free product. You'll find Kovar utilized in power tubes, microwave tubes, transistors, diodes, hybrid packages, and other kinds of scientific instruments.
Available Kovar Alloy sheet, plate, rod, coil & strip, and can cut, slit or centerless grind these to your specifications. If you require another form of Kovar Alloy, please feel free to contact us.
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