Kovar Alloy, also know as ASTM F-15, NILO K, Pernifer 2918, Rodar, and Dilvar 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 (or Pyrex) glasses 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 in applications such as power tubes, microwave tubes, transistors, diodes, hybrid packages, and other kinds of scientific instruments.
Ed Fagan Inc. stocks Kovar Alloy sheet, Kovar Alloy plate, Kovar Alloy rod, Kovar Alloy coil & strip, and Kovar Alloy photo-etch; and can cut, slit or centerless grind these to your specifications. If you require another form of Kovar Alloy, please call 800-348-6268, and one of or material experts can help you with your request.