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China factory - Huona (Shanghai) New Material Co., Ltd.

Huona (Shanghai) New Material Co., Ltd.

  • China,Shanghai ,Shanghai
  • Verified Supplier

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China High Precision 4J29 Alloy Wire For Fe-Ni-Co Wire Kovar Type Sealing Alloy
China High Precision 4J29 Alloy Wire For Fe-Ni-Co Wire Kovar Type Sealing Alloy

  1. China High Precision 4J29 Alloy Wire For Fe-Ni-Co Wire Kovar Type Sealing Alloy

High Precision 4J29 Alloy Wire For Fe-Ni-Co Wire Kovar Type Sealing Alloy

  1. MOQ: 1kg
  2. Price: Bargain
  3. Get Latest Price
Payment Terms T/T
Supply Ability 1000kg Per Week
Delivery Time A WEEK
Packaging Details Carton or Wooden Case
Thermal Expansion (30–300°C) ~5.0 x 10⁻⁶ /°C
Density ~8.2 g/cm³
Resistivity ~0.42 μΩ·m
Tensile Strength ≥ 450 MPa
Elongation ≥ 25%
Diameter 0.02 mm – 3.0 mm
Brand Name HUONA
Model Number wire
Certification ISO9001
Place of Origin CHINA

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  1. Product Details
  2. Company Details

Product Specification

Payment Terms T/T Supply Ability 1000kg Per Week
Delivery Time A WEEK Packaging Details Carton or Wooden Case
Thermal Expansion (30–300°C) ~5.0 x 10⁻⁶ /°C Density ~8.2 g/cm³
Resistivity ~0.42 μΩ·m Tensile Strength ≥ 450 MPa
Elongation ≥ 25% Diameter 0.02 mm – 3.0 mm
Brand Name HUONA Model Number wire
Certification ISO9001 Place of Origin CHINA
High Light High Precision glass sealing alloy wireHigh Precision Low Expansion AlloySGS glass sealing alloy wire

Product Overview:
4J29 alloy wire, also known as a Fe-Ni-Co sealing alloy or Kovar-type wire, is widely used in applications requiring glass-to-metal hermetic sealing. It contains approximately 29% nickel and 17% cobalt, which gives it a controlled thermal expansion closely matched with borosilicate glass. This makes it ideal for use in electronic tubes, vacuum relays, infrared sensors, and aerospace-grade components.

Material Composition:

  • Nickel (Ni): ~29%

  • Cobalt (Co): ~17%

  • Iron (Fe): Balance

  • Other elements: trace amounts of Mn, Si, C, etc.

Thermal Expansion (30–300°C): ~5.0 x 10⁻⁶ /°C
Density: ~8.2 g/cm³
Resistivity: ~0.42 μΩ·m
Tensile Strength: ≥ 450 MPa
Elongation: ≥ 25%

Available Sizes:

  • Diameter: 0.02 mm – 3.0 mm

  • Length: on spools, coils, or cut lengths as required

  • Surface: Bright, smooth, oxidation-free

  • Condition: Annealed or cold drawn

Key Features:

  • Excellent thermal expansion compatibility with hard glass

  • Ideal for hermetic sealing in electronic and aerospace applications

  • Good weldability and high dimensional accuracy

  • Stable magnetic properties under various environmental conditions

  • Custom diameters and packaging options available

Typical Applications:

  • Vacuum relays and glass-sealed relays

  • Infrared and microwave device packaging

  • Glass-to-metal feedthroughs and connectors

  • Electronic tubes and sensor leads

  • Hermetically sealed electronic components in aerospace and defense

Packaging & Shipping:

  • Supplied in plastic spools, coils, or vacuum-sealed bags

  • Anti-rust and anti-moisture packaging optional

  • Shipping available by air, sea, or express

  • Delivery time: 7–15 working days depending on quantity

Handling and Storage:
Keep in a dry, clean environment. Avoid moisture or chemical exposure. Re-annealing may be needed before sealing to ensure optimal bonding with glass.


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Company Details

Bronze Gleitlager

,

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 and 

Graphite Plugged Bushings

 from Quality China Factory
  • Business Type:

    Manufacturer,Exporter

  • Year Established:

    2008

  • Total Annual:

    8000000-100000000

  • Employee Number:

    100~120

  • Ecer Certification:

    Verified Supplier

Huona (Shanghai) New Material Co., Ltd. Was established in 2008, currently have three divisions: Magnesium Division, Thermal Spray Division and Functional Material Division.Magnesium Division produces magnesium metal products. Various models of high-quality magnesium alloy plate, magnesium rods, hig... Huona (Shanghai) New Material Co., Ltd. Was established in 2008, currently have three divisions: Magnesium Division, Thermal Spray Division and Functional Material Division.Magnesium Division produces magnesium metal products. Various models of high-quality magnesium alloy plate, magnesium rods, hig...

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Get in touch with us

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  • Huona (Shanghai) New Material Co., Ltd.
  • 1900 Mudanjiang Road, Baoshan District, 201999, Shanghai, China
  • https://www.nicralloy.com/

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