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4J45 Sealing Alloy Wire | Fe-Ni Wire for Sensors Relays Semiconductor Components

Categories Low Expansion Alloy
Brand Name: HUONA
Model Number: WIRE
Certification: ISO9001 SGS
Place of Origin: CHINA
MOQ: 1KG
Price: negotiation
Payment Terms: T/T
Supply Ability: 1000tons/Year
Delivery Time: 7–15 working days
Packaging Details: Vacuum-sealed or plastic spool packaging
Coefficient of Thermal Expansion, 20–300°C: 7.5 × 10⁻⁶ /°C
Density: 8.2 g/cm³
Electrical Resistivity: 0.55 μΩ·m
Tensile Strength: ≥ 450 MPa
Magnetic Properties: Weakly magnetic
Diameter range: 0.02 mm – 3.0 mm
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4J45 Sealing Alloy Wire | Fe-Ni Wire for Sensors Relays Semiconductor Components

Product Overview

4J45 alloy wire is a controlled thermal expansion Fe-Ni alloy consisting of approximately 45% nickel. It is engineered for applications requiring dimensional stability and hermetic sealing, particularly where thermal compatibility with glass or ceramic is crucial. This material is ideal for use in semiconductor lead frames, sensor housings, and high-reliability electronic packaging.


Material Composition

  • Nickel (Ni): ~45%

  • Iron (Fe): Balance

  • Trace elements: Mn, Si, C

CTE (Coefficient of Thermal Expansion, 20–300°C): ~7.5 × 10⁻⁶ /°C
Density: ~8.2 g/cm³
Electrical Resistivity: ~0.55 μΩ·m
Tensile Strength: ≥ 450 MPa
Magnetic Properties: Weakly magnetic


Specifications

  • Diameter range: 0.02 mm – 3.0 mm

  • Surface finish: Bright / oxide-free

  • Supply form: Spools, coils, cut lengths

  • Delivery condition: Annealed or cold-drawn

  • Custom dimensions available


Key Features

  • Moderate thermal expansion matching glass/ceramic

  • Excellent sealing and bonding characteristics

  • Good weldability and corrosion resistance

  • Dimensional stability under thermal cycling

  • Suitable for microelectronics and optical devices


Applications

  • Hermetic seals for semiconductors

  • Infrared sensor housings

  • Relay casings and electronic modules

  • Glass-to-metal seals in communication components

  • Aerospace-grade packages and connectors


Packaging & Shipping

  • Vacuum-sealed or plastic spool packaging

  • Custom labeling and bulk options available

  • Delivery: 7–15 working days

  • Shipping methods: Air freight, sea freight, courier


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Cheap 4J45 Sealing Alloy Wire | Fe-Ni Wire for Sensors Relays Semiconductor Components for sale
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