Kovar, also known as Rodar, is an iron nickel cobalt alloy and a registered trademark of CRS Holding. It was specifically developed and formulated as a sealing alloy for ceramic and glass materials due to the compatibility with the thermal expansion characteristics of borosilicate glass. Kovar/Rodar is used in industrial manufacturing primarily in medical, electronics and semiconductor fields.

Typical Industry Applications:
  • Electronics industry where metal is required to bond to glass
  • Vacuum tubes
  • X-ray tubes
  • Power tubes
  • Optical devices
  • Scientific instruments
Specifications (typical, but not limited to):
  • ASTM F15
Generally Available Forms:
  • Sheet
  • Plate
  • Round bar
  • Wire
  • Strip
  • Coil