Kovar Wire

Ken-tron draws Kovar metal wire (ASTM F-15) to a variety of diameters.  Our customers use Kovar Ken-tron metal wire for applications in the aerospace, automotive, defense, electronics, and telecommunications industries.  Glass to metal seal and glass to ceramic seal are also common uses of this Ken-tron controlled expansion wire.

Kovar alloy wire is a nickel iron alloy suitable for glass and ceramic sealing to metal. It is commonly used in lead wire for mercury switches and in semiconductor devices. Material compliant to SAE AMS I23011 Class 1 and ASTM F-15.

Chemical Composition

ASTM F15 – 04
Iron 53.0 Nominal
Nickel 29.0 Nominal
Cobalt 17.0 Nominal
Manganese .50 Max
Silicon .20 Max
Carbon .04 Max
Aluminum .10 Max
Magnesium .10 Max
Zirconium .10 Max
Titanium .10 Max
Copper .20 Max
Chromium .20 Max
Molybdenum .20 Max
SAE AMS I23011
Class I
Temper PSI Range
Annealed 85,000 Maximum
1/4 Hard 90,000 – 105,000
1/2 Hard 105,000 – 125,000
Hard 120,000 Minimum

Temperature Coefficient Of Thermal Expansion

Cm per cm per °C x 10 minus 6

30 – 400 °C 4.6 – 5.2
30 – 450 °C 5.1 – 5.5

Other Properties

Density (lbs/in3) .302
Melting Point (°F) 2640
Electrical Resistivity 294 ohm-cir mil/ft

The Ken-tron Wire Division specializes in small diameter close tolerance wire made to customer specifications. Ken-Tron manufactures to your custom specifications.

For additional Inquiries, please request a quote or contact us.

Click here for a full color parts brochure (1.31 MB) in PDF format.