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Kovar

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HS 556 Kovar
#KOVAR

Description

USA ASTM SAE AMS 7726G (2000), Kovar Specialsteel Iron-Nickel-Cobalt Alloy, Wire 53Fe - 29Ni - 17Co Low Expansion, Glass Sealing, Annealed and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: Kovar
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel Kovar Precipitation-Hardening ASTM USA Iron-Nickel-Cobalt Alloy, Wire 53Fe - 29Ni - 17Co Low Expansion, Glass Sealing, Annealed

Chemical composition(mass fraction)(wt.%) of the Kovar

C Si Mn Ni Cr Al Cu Ti Fe Mo Co W Mg Zr
≤0.04 ≤0.20 ≤0.50 ≤29.00 ≤0.20 ≤0.10 ≤0.20 ≤0.10 ≤53.00 ≤0.20 ≤17.00 ≤ ≥ ≤0.10 ≤0.10

Mechanical Properties of steel grade Kovar

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV/Ku (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
227 (≥) 967 (≥) 41 14 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 422

Physical Properties of steel grade Kovar

Temperature
(°C)		 Modulus of elasticity
(GPa)		 Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)		 Specific thermal capacity
(J/kg·°C)		 Specific electrical resistivity
(Ω mm²/m)		 Density
(kg/dm³)		 Poisson’s coefficient, ν
42 - -     0.21 -  
877 188 - 24.3 434   -  
616 - 41 34.2   124 112

Heat Treatment of steel grade Kovar

Heat treated : 1226°C - 1912°C

Technological Curves of steel grade Kovar

Cross Reference Table (Equivalent Grade) of Kovar

Grade Standard Country Application
KOVAR

Relevant standard of Kovar

SAE AMS 7726G (2000) Iron-Nickel-Cobalt Alloy, Wire 53Fe - 29Ni - 17Co Low Expansion, Glass Sealing, Annealed SAE-AMS-7726G-(2000).pdf
HS 556 Kovar
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