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Precision 4J42 Wire | Low Expansion Alloy for Vacuum Devices, Sensors, and Semiconductor Packages
Precision 4J42 Wire | Low Expansion Alloy for Vacuum Devices, Sensors, and Semiconductor Packages
Specifications
Brand Name :
HUONA
Model Number :
WIRE
Certification :
ISO9001 SGS
Place of Origin :
CHINA
MOQ :
1KG
Price :
negotiable
Payment Terms :
T/T
Supply Ability :
100,000 pieces / week
Delivery Time :
a week
Packaging Details :
negotiable
CTE (Coefficient of Thermal Expansion, 20–300°C) :
5.5–6.0 × 10⁻⁶ /°C
Density :
8.1 g/cm³
Electrical Resistivity :
0.75 μΩ·m
Tensile Strength :
≥ 430 MPa
Magnetic Properties :
Soft magnetic, low coercivity
Diameter :
0.02 mm – 3.0 mm
Description

Product Overview

4J42 wire is a precision-controlled expansion alloy composed of iron and approximately 42% nickel. It is engineered to closely match the thermal expansion of borosilicate glass and other packaging materials, making it an ideal choice for hermetic sealing, electronic packaging, and aerospace applications.

Chemical Composition

  • Nickel (Ni): ~42%

  • Iron (Fe): Balance

  • Minor elements: Mn, Si, C (trace amounts)

CTE (Coefficient of Thermal Expansion, 20–300°C): ~5.5–6.0 × 10⁻⁶ /°C
Density: ~8.1 g/cm³
Electrical Resistivity: ~0.75 μΩ·m
Tensile Strength: ≥ 430 MPa
Magnetic Properties: Soft magnetic, low coercivity

Specifications

  • Diameter: 0.02 mm – 3.0 mm

  • Surface: Bright, oxide-free

  • Form: Spool, coil, cut-to-length

  • Condition: Annealed or cold drawn

  • Customization: Available on request

Key Features

  • Matched thermal expansion for glass and ceramics

  • Stable mechanical and magnetic properties

  • Excellent vacuum compatibility

  • Ideal for electronic sealing, relays, and sensor leads

  • Low expansion with good ductility and weldability

Applications

  • Glass-to-metal hermetic seals

  • Semiconductor lead frames

  • Electronic relay headers

  • Infrared and vacuum sensors

  • Communication devices and packaging

  • Aerospace connectors and enclosures

Packaging & Shipping

  • Vacuum packaging or plastic spools

  • Anti-corrosion treatment

  • Air/sea/express delivery available

  • Delivery time: 7–15 business days


  • Precision 4J42 Wire | Low Expansion Alloy for Vacuum Devices, Sensors, and Semiconductor Packages
    Precision 4J42 Wire | Low Expansion Alloy for Vacuum Devices, Sensors, and Semiconductor Packages
    Precision 4J42 Wire | Low Expansion Alloy for Vacuum Devices, Sensors, and Semiconductor Packages
    Precision 4J42 Wire | Low Expansion Alloy for Vacuum Devices, Sensors, and Semiconductor Packages
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Precision 4J42 Wire | Low Expansion Alloy for Vacuum Devices, Sensors, and Semiconductor Packages

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Product Detail
Brand Name :
HUONA
Model Number :
WIRE
Certification :
ISO9001 SGS
Place of Origin :
CHINA
MOQ :
1KG
Price :
negotiable
Contact Supplier
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Precision 4J42 Wire | Low Expansion Alloy for Vacuum Devices, Sensors, and Semiconductor Packages

Huona (Shanghai) New Material Co., Ltd.

Verified Supplier
1 Years
shanghai, shanghai
Since 2008
Business Type :
Manufacturer, Exporter
Main Products :
Low Expansion Alloy, Soft Magnetic Alloy, Elastic Alloy
Total Annual :
8000000-100000000
Employee Number :
100~120
Certification Level :
Verified Supplier
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