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Precision 4J42 Wire | Low Expansion Alloy for Vacuum Devices, Sensors, and Semiconductor Packages
| Place of Origin | CHINA |
|---|---|
| Brand Name | HUONA |
| Certification | ISO9001 SGS |
| Model Number | WIRE |
| Minimum Order Quantity | 1KG |
| Price | negotiable |
| Packaging Details | negotiable |
| Delivery Time | a week |
| Payment Terms | T/T |
| Supply Ability | 100,000 pieces / week |
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xProduct Details
| 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 |
| Highlight | 4j42 low expansion alloy,4j42 cobalt chromium alloy |
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Product 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
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Nickel (Ni): ~42%
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Iron (Fe): Balance
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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
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Diameter: 0.02 mm – 3.0 mm
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Surface: Bright, oxide-free
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Form: Spool, coil, cut-to-length
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Condition: Annealed or cold drawn
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Customization: Available on request
Key Features
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Matched thermal expansion for glass and ceramics
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Stable mechanical and magnetic properties
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Excellent vacuum compatibility
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Ideal for electronic sealing, relays, and sensor leads
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Low expansion with good ductility and weldability
Applications
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Glass-to-metal hermetic seals
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Semiconductor lead frames
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Electronic relay headers
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Infrared and vacuum sensors
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Communication devices and packaging
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Aerospace connectors and enclosures
Packaging & Shipping
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Vacuum packaging or plastic spools
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Anti-corrosion treatment
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Air/sea/express delivery available
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Delivery time: 7–15 business days
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