4J42 Low Expansion Alloy Wire for Vacuum Devices and Semiconductor Seals
Price:
Bargain
MOQ:
1KG
Delivery Time:
a week
Brand:
HUONA
Product Description
Precision 4J42 Wire | Low Expansion Alloy for Vacuum Devices, Sensors, and Semiconductor Packages
| Attribute | Value |
|---|---|
| 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 |
| Condition | Annealed or cold drawn |
| Customization | Available on request |
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)
Key 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
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Huona (Shanghai) New Material Co., Ltd.
Location
1900 Mudanjiang Road, Baoshan District, 201999, Shanghai, China
Contact Person
Roy