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Kovar® Plate
Pernifer 2918®, Dilvar P1®, NILO K®
Description
Kovar is a controlled expansion alloy. It is a nickel iron alloy with 29% nickel, 17% cobalt and the remaining balance is iron.
Related Standards
Equivalent Materials
Properties
Dimension
Length l
1829 mm
Thickness t
4.8 - 31.8 mm
Width w
381 mm
Electrical
Electrical resistivity ρel
4E-7 Ω·m at 20 °C
General
Density ρ
8.36 g/cm³ at 20 °C
Magnetic
Curie temperature Tc
435 °C at 20 °C
Material Information
Dimension
Available thicknesses: 4.8mm, 6.4mm, 7.1mm, 7.9mm, 9.5mm, 11.1mm, 12.7mm, 15.9mm, 19.1mm, 25.4mm, 31.8mm
Mechanical
Elastic modulus E
207 GPa at 20 °C
Elongation A
30 % at 20 °C
in 2 in.
Hardness, Rockwell B HRB
80 [-] at 20 °C
Tensile strength Rm
518 MPa at 20 °C
Yield strength YS
276 MPa at 20 °C
Thermal
Coefficient of thermal expansion α
5.8E-6 1/K at 100 °C
Melting point Tm
1449 °C
Specific heat capacity cp
460 J/(kg·K) at 20 °C
Thermal conductivity λ
17 W/(m·K) at 20 °C
Chemical properties
Element
Weight %
Comment
-
balance
29 %
17 %
0.2 %
0.2 %
Technological properties
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
This material data has been provided by Ed Fagan.
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.
Materials by this supplier
