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Kovar Coil

Kovar Coil
Interested in Kovar Coil?

Eagle Alloys Corporation (EAC) is a leading global supplier of nickel iron controlled expansion alloys including ASTM F 15 Alloy (Kovar®) coil. A wide variety of Kovar® coil sizes from 0.004” Thk up to 0.082” Thk are available from stock with immediate shipping and custom sizes can be quickly produced.

Please contact our courteous sales team to assist you. Please view or print our Kovar stock list for our complete stock sizes and capabilities. Eagle Alloys Corporation is an ISO Certified Corporation and have been supply the highest quality ASTM F 15 Alloy coil for over 35 years.

Kovar® coil is typically supplied to meet the requirements of AMS/MIL-23011C, Class 1.  Other specifications upon request.

Our ASTM F15 alloy (Kovar®) coil are in conformance with Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 and are DFARS Compliant.  Eagle Alloys Corporation is an ISO Certified Corporation and have been supply the highest quality Kovar® coil for over 35 years.

Kovar® coil is an alloy made up of 29% nickel, 17% cobalt, .2% silicon, .3% manganese and 53.5% iron. Kovar® coil is known for its low coefficient of thermal expansion. Kovar coil is suitable for uses which require a matched expansion seal between metal and glass parts.  Kovar® end uses are usually glass sealing in the electronics industry.  Typical applications for Kovar ® coil are glass-to-metal seals, lead frames, electronic package base, lids, power tubes, transistors, diodes, microwave tubes, hybrid packages, x-ray tubes, vacuum tubes, and light bulbs.

Eagle Alloys also supplies additional low expansion, controlled expansion, and glass-to-metal or ceramic sealing alloys including Invar®, Alloy 42, Alloy 46 Alloy, 47/50, 48, 49, and Alloy 52. EAC can supply soft magnetic Alloy 50, Hiperco 50 & 50A, and Vim Var Core Iron.

Kovar is a registered trademark of CRS Holdings, Inc.,
a subsidiary of Carpenter Technology Corp.

Eagle Alloys Kovar Coil Capabilities

Min Size
Max Size
Kovar Coil
0.004" Thk
up to 0.070" Thk
*Custom sizes upon request

Kovar Coil Stock Sizes Same Day Shipping (subject to prior sale)

Same Day Shipping
Kovar Coil
  • Contact Us For Sizing
  • Contact Us For Sizing
  • Contact Us For Sizing

Common Industry Applications

STATEMENT OF LIABILITY - DISCLAIMER Any suggestion of product applications or results is given without representation or warranty, either expressed or implied. Without exception or limitation, there are no warranties of merchantability or of fitness for particular purpose or application. The user must fully evaluate every process and application in all aspects, including suitability, compliance with applicable law and non-infringement of the rights of others Eagle Alloys Corporation and its affiliates shall have no liability in respect thereof.


Contact Eagle Alloys

Toll Free: 800.237.9012
Local: 423.586.8738
Fax: 423.586.7456


Company Headquarters:
178 West Park Court
Talbott, TN 37877

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