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Kovar / Nifeco29 / Nilo K / 4J29 Alloy Tubes / Pipes Used For Plastic Pin

    Buy cheap Kovar / Nifeco29 / Nilo K / 4J29 Alloy Tubes / Pipes Used For Plastic Pin from wholesalers
     
    Buy cheap Kovar / Nifeco29 / Nilo K / 4J29 Alloy Tubes / Pipes Used For Plastic Pin from wholesalers
    • Buy cheap Kovar / Nifeco29 / Nilo K / 4J29 Alloy Tubes / Pipes Used For Plastic Pin from wholesalers
    • Buy cheap Kovar / Nifeco29 / Nilo K / 4J29 Alloy Tubes / Pipes Used For Plastic Pin from wholesalers
    • Buy cheap Kovar / Nifeco29 / Nilo K / 4J29 Alloy Tubes / Pipes Used For Plastic Pin from wholesalers
    • Buy cheap Kovar / Nifeco29 / Nilo K / 4J29 Alloy Tubes / Pipes Used For Plastic Pin from wholesalers

    Kovar / Nifeco29 / Nilo K / 4J29 Alloy Tubes / Pipes Used For Plastic Pin

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    Brand Name : TANKII
    Model Number : Kovar Alloy
    Certification : ISO SGS
    Price : negotiable
    Payment Terms : L/C, T/T, Western Union
    Supply Ability : 1000000 Pcs per Month
    Delivery Time : 7-15 work days
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    Kovar / Nifeco29 / Nilo K / 4J29 Alloy Tubes / Pipes Used For Plastic Pin

    Kovar / Nifeco29 / Nilo K / 4J29 Alloy Tubes / Pipes Used for Plastic Pin

    (Common Name: Kovar, NiFeCo29, NiCoFe294,Nilo K)

    Controlled Expansion and Glass Sealing Alloys
    German standard numberTradenameDINUNS
    1.3912Alloy 3617745K93600/93601
    1.3917Alloy 4217745K94100
    1.3922Alloy 4817745K94800
    1.3981Pernifer291817745K94610
    2.4478NiFe 4717745N14052
    2.4486NiFe47Cr17745-

    General Description
    Kovar is a nominal 29%Ni-17%Co-54%Fe alloy that is a well-known glass-sealing alloy suitable for sealing to hard glasses. Kovar has a nominal expansion coefficient of approximately 5 ppm/°C and inflection temperature of ~450 °C (840 °F).

    4J29 also known as Fe-Ni-Co Glass Sealing Alloy. it was invented to meet the need for a reliable glass-to-metal seal, which is required in electronic devices such as light bulbs, vacuum tubes, cathode ray tubes, and in vacuum systems in chemistry and other scientific research.

    Kovar (ASTM F15) has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials. This alloy has found wide application in power tubes, microwave tubes, transistors, and diodes. In integrated circuits, it has been used for the flat pack and the dual-in-line package.

    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.

    Chemical Composition

    alloyCMnSiPSNiCrCoCuMoFe
    4J29≤0.03≤0.50≤0.30≤0.020≤0.02028.5~29.5≤0.2016.8~17.8≤0.2≤0.2balance

    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(OMmm2/m)0.48
    Temperature factor of resistivity(20ºC~100ºC)X10-5/ºC3.7~3.9
    Curie point Tc/ ºC430
    Elastic Modulus, E/ Gpa138


    The heat treatment process

    Annealing for stress reliefHeated to 470~540ºC and hold 1~2 h. Cold down
    annealingIn vacuum heated to 750~900ºC
    Holding time14 min~1h.
    Cooling rateNo more than 10 ºC/min cooled to 200 ºC

    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

    Style of supply

    Alloys NameTypeDimension
    4J29WireD= 0.1~8mm
    4J29StripW= 5~250mmT= 0.1mm
    4J29FoilW= 10~100mmT= 0.01~0.1mm
    4J29BarDia= 8~100mmL= 50~1000mm

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