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Reliable Quality Kovar Expansion Alloy Sheet Engrave Bright

    Buy cheap Reliable Quality Kovar Expansion Alloy Sheet Engrave Bright from wholesalers
     
    Buy cheap Reliable Quality Kovar Expansion Alloy Sheet Engrave Bright from wholesalers
    • Buy cheap Reliable Quality Kovar Expansion Alloy Sheet Engrave Bright from wholesalers
    • Buy cheap Reliable Quality Kovar Expansion Alloy Sheet Engrave Bright from wholesalers
    • Buy cheap Reliable Quality Kovar Expansion Alloy Sheet Engrave Bright from wholesalers
    • Buy cheap Reliable Quality Kovar Expansion Alloy Sheet Engrave Bright from wholesalers

    Reliable Quality Kovar Expansion Alloy Sheet Engrave Bright

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    Brand Name : JX
    Model Number : Reliable Quality Kovar Expansion Alloy Sheet Engrave
    Certification : ISO
    Price : Negotiable
    Payment Terms : L/C, T/T
    Supply Ability : 3000T
    Delivery Time : 35days
    • Product Details
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    Reliable Quality Kovar Expansion Alloy Sheet Engrave Bright

    Reliable Quality Kovar Expansion Alloy Sheet Engrave

    Iron nickel cobalt precision alloy kovar sheet price with ASTM F15

    Kovar Sheet not only has thermal expansion similar to glass, but its nonlinear thermal expansion curve can often be made to match a glass, thus allowing the joint to tolerate a wide temperature range. Chemically, it bonds to glass via the intermediate oxide layer of nickel oxide and cobalt oxide; the proportion of iron oxide is low due to its reduction with cobalt. The bond strength is highly dependent on the oxide layer thickness and character. The presence of cobalt makes the oxide layer easier to melt and dissolve in the molten glass. A grey, grey-blue or grey-brown color indicates a good seal. A metallic color indicates lack of oxide, while black color indicates overly oxidized metal, in both cases leading to a weak joint.

    Mainly used in electric vacuum components and emission control, shock tube, igniting tube, glass magnetron, transistors, seal plug, relay, integrated circuits lead, chassis, brackets and other housing sealing.


    Kovar Sheet Normal composition%

    Ni28.5~29.5FeBal.Co16.8~17.8Si≤0.3
    Mo≤0.2Cu≤0.2Cr≤0.2Mn≤0.5
    C≤0.03P≤0.02S≤0.02

    Tensile Strength, MPa
    Code of conditionConditionWireStrip
    RSoft≤585≤570
    1/4I1/4 Hard585~725520~630
    1/2I1/2 Hard655~795590~700
    3/4I3/4 Hard725~860600~770
    IHard≥850≥700

    Typical Physical properties
    Density (g/cm3)8.2
    Electrical resistivity at 20ºC(Om*mm2/m)0.48
    Temperature factor of resistivity(20ºC~100ºC)X10-5/ºC3.7~3.9
    Curie point Tc/ ºC430
    Elastic Modulus, E/ Gpa138

    Kovar Expansion Alloy Sheet Picture:

    Coefficient of expansion

    θ/ºCα1/10-6ºC-1θ/ºCα1/10-6ºC-1
    20~607.820~5006.2
    20~1006.420~5507.1
    20~2005.920~6007.8
    20~3005.320~7009.2
    20~4005.120~80010.2
    20~4505.320~90011.4



    Thermal conductivity
    θ/ºC100200300400500
    λ/ W/(m*ºC)20.621.522.723.725.4

    Quality Reliable Quality Kovar Expansion Alloy Sheet Engrave Bright for sale
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