The material: 'Kovar® Sheet' you were looking for has been superseded by the one below.

Kovar® Sheet

View suppliers (15)
Alternative and trade names
Pernifer 2918®, Dilvar P1®, NILO K®
Want to keep this datasheet? Save it now in your required format

Description

Kovar 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.

Related Standards

Equivalent Materials

This material data has been provided by Matmatch.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

See where falls on the material property chart for against in your materials selection and design process. Our Ashby charts are interactive with more technical data upon clicking. Sign up to get access to this premium feature for free.

Properties

General

PropertyTemperatureValue

Density

23.0 °C

8.36 g/cm³

Show Material materials with Density of 8.36 g/cm³

Dimension

PropertyValue

Length

1828 mm

Show Material materials with Length of 1828 mm

Thickness

0.25 - 3.2 mm

Show Material materials with Thickness of 0.25 - 3.2 mm

Width

330.2 mm

Show Material materials with Width of 330.2 mm

Dimensions

Available thicknesses: 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm, 0.9mm, 1.0mm, 1.3mm, 1.5mm, 2.1mm, 2.3mm, 2.5mm, 3.2mm

Mechanical

PropertyTemperatureValueComment

Elastic modulus

23.0 °C

207 GPa

Show Material materials with Elastic modulus of 207 GPa

Elongation

23.0 °C

30 %

Show Material materials with Elongation of 30 %

in 2 in.

Hardness, Rockwell B

23.0 °C

80 [-]

Show Material materials with Hardness, Rockwell B of 80 [-]

Tensile strength

23.0 °C

518 MPa

Show Material materials with Tensile strength of 518 MPa

Yield strength

23.0 °C

276 MPa

Show Material materials with Yield strength of 276 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

100.0 °C

5.8E-6 1/K

Show Material materials with Coefficient of thermal expansion of 5.8E-6 1/K

from 30°C to the mentioned temperature

150.0 °C

5.6E-6 1/K

Show Material materials with Coefficient of thermal expansion of 5.6E-6 1/K

from 30°C to the mentioned temperature

200.0 °C

5.4E-6 1/K

Show Material materials with Coefficient of thermal expansion of 5.4E-6 1/K

from 30°C to the mentioned temperature

250.0 °C

5.3E-6 1/K

Show Material materials with Coefficient of thermal expansion of 5.3E-6 1/K

from 30°C to the mentioned temperature

300.0 °C

5.1E-6 1/K

Show Material materials with Coefficient of thermal expansion of 5.1E-6 1/K

from 30°C to the mentioned temperature

350.0 °C

4.9E-6 1/K

Show Material materials with Coefficient of thermal expansion of 4.9E-6 1/K

from 30°C to the mentioned temperature

400.0 °C

4.6E-6 - 5.2E-6 1/K

Show Material materials with Coefficient of thermal expansion of 4.6E-6 - 5.2E-6 1/K

from 30°C to the mentioned temperature

450.0 °C

5.1E-6 - 5.5E-6 1/K

Show Material materials with Coefficient of thermal expansion of 5.1E-6 - 5.5E-6 1/K

from 30°C to the mentioned temperature

500.0 °C

6.1E-6 1/K

Show Material materials with Coefficient of thermal expansion of 6.1E-6 1/K

from 30°C to the mentioned temperature

550.0 °C

6.8E-6 1/K

Show Material materials with Coefficient of thermal expansion of 6.8E-6 1/K

from 30°C to the mentioned temperature

600.0 °C

7.5E-6 1/K

Show Material materials with Coefficient of thermal expansion of 7.5E-6 1/K

from 30°C to the mentioned temperature

700.0 °C

8.7E-6 1/K

Show Material materials with Coefficient of thermal expansion of 8.7E-6 1/K

from 30°C to the mentioned temperature

800.0 °C

1.03E-5 1/K

Show Material materials with Coefficient of thermal expansion of 1.03E-5 1/K

from 30°C to the mentioned temperature

900.0 °C

1.08E-5 1/K

Show Material materials with Coefficient of thermal expansion of 1.08E-5 1/K

from 30°C to the mentioned temperature

1026.0 °C

1.17E-5 1/K

Show Material materials with Coefficient of thermal expansion of 1.17E-5 1/K

from 30°C to the mentioned temperature

Melting point

1449 °C

Show Material materials with Melting point of 1449 °C

Specific heat capacity

23.0 °C

460 J/(kg·K)

Show Material materials with Specific heat capacity of 460 J/(kg·K)

Thermal conductivity

23.0 °C

17 W/(m·K)

Show Material materials with Thermal conductivity of 17 W/(m·K)

Electrical

PropertyTemperatureValue

Electrical resistivity

23.0 °C

4E-7 Ω·m

Show Material materials with Electrical resistivity of 4E-7 Ω·m

Magnetic

PropertyValue

Curie temperature

435 °C

Show Material materials with Curie temperature of 435 °C

Chemical properties

PropertyValue

Carbon

0.02 %

Show Material materials with Carbon of 0.02 %

Chromium

0.2 %

Show Material materials with Chromium of 0.2 %

Cobalt

17 %

Show Material materials with Cobalt of 17 %

Iron

Balance

Nickel

29 %

Show Material materials with Nickel of 29 %

Silicon

0.2 %

Show Material materials with Silicon of 0.2 %

Technological properties

Property
Application areas

Common applications of Kovar: Glass-to-metal hermetic sealing with hard borosilicate glass, ceramic-to-metal sealing, power tubes, microwave tubes, transistors, diodes, integrated circuits, hybrid packages

Looking for suppliers of this material? Click to see 15 supplier of Kovar® Sheet on Matmatch