: Products > Special Metal Division > Kovar
Typical Analysis in Percent
Ni 29

Co

17

Fe

Balance

Si

0.10
Mn 0.30 C 0.02 maximum
 
Typical Physical Properties
Density : .302 lb/in³
Specific Gravity : 8.36
Curie Temperature : 435 ℃
Melting Point : 1450 ℃
Specific Heat : - 105 cal/gm/ ℃ at 0 ℃
                              - 155 cal/gm/ ℃ at 430 ℃
Heat of Fusion : 64 cal/gm
Thermal Conductivity : 17.3 W/m·K
Electrical Resistivity : 490 microhm/mm
Typical Mechanical Properties
Shear Modulus : 7.5·106
Modulus of Elasticity : 20·106
Ultimate Strength : 75,000 psi
Yield Strength : 50,000 psi
Poisson’s Ratio : 317
Elongation : 30%
Hardness (Rockwell B) : 78
Coefficient of Thermal Expansion (Nominal)
30 ℃ - 200 ℃
5.5 (x 10 -6 m/m·K)

30 ℃ - 600 ℃

7.9

30 ℃ - 300 ℃

5.1

30 ℃ - 700 ℃

9.3
30 ℃ - 400 ℃ 4.9 30 ℃ - 800 ℃ 10.4
30 ℃ - 450 ℃ 5.3 30 ℃ - 900 ℃ 11.5
30 ℃ - 500 ℃ 6.2    

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