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Kovar

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Kovar Kovar
#KOVAR

Description

USA ASTM SAE AMS 7727E (2000), Kovar Specialsteel Iron-Nickel-Cobalt Alloy, Bars and Forgings, 53Fe - 29Ni - 17Co, Low Expansion, Glass Sealing 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, Bars and Forgings, 53Fe - 29Ni - 17Co, Low Expansion, Glass Sealing

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)
522 (≥) 573 (≥) 41 33 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 133

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
21 - -     0.42 -  
374 242 - 33.3 342   -  
471 - 21 32.2   412 132

Heat Treatment of steel grade Kovar

Heat treated : 1561°C - 1589°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 7727E (2000) Iron-Nickel-Cobalt Alloy, Bars and Forgings, 53Fe - 29Ni - 17Co, Low Expansion, Glass Sealing SAE-AMS-7727E-(2000).pdf
Kovar Kovar
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