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June 24, 2025
Category Connection: Low Expansion Alloy
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Tags:
#Feni52 Wire #Alloy 42 Invar Strip #Kovar Rod
Brief: Discover the High Precision 4J33 Sealing Wire, a controlled expansion alloy designed for hermetic packaging. Perfect for glass-to-metal sealing in vacuum tubes, infrared sensors, and electronic relays, this alloy ensures reliability and precision in high-performance applications.
Related Product Features:
  • Precision low-expansion Fe-Ni-Co alloy with 33% nickel for hermetic sealing.
  • Thermal expansion coefficient closely matches hard glass and ceramics.
  • Excellent corrosion resistance and weldability for durable performance.
  • Clean, oxide-free surface finish, ideal for vacuum-compatible applications.
  • Available in diameters from 0.02 mm to 3.0 mm, custom sizes on request.
  • Soft magnetic properties with good permeability and stability.
  • Widely used in aerospace, electronics, and optical device enclosures.
  • Delivered in coils, spools, or cut lengths, with annealed or cold-drawn options.
Faqs:
  • What is the thermal expansion coefficient of the 4J33 Sealing Wire?
    The thermal expansion coefficient of the 4J33 Sealing Wire is approximately 5.3 × 10⁻⁶ /°C, making it an excellent match for hard glass and ceramics.
  • What are the typical applications of the 4J33 Sealing Wire?
    The 4J33 Sealing Wire is commonly used in glass-to-metal hermetic seals, vacuum tubes, infrared sensors, relay housings, and aerospace-grade connectors.
  • What packaging options are available for the 4J33 Sealing Wire?
    The 4J33 Sealing Wire is available in standard plastic spools, vacuum-sealed packaging, or custom packaging options, with delivery via air, sea, or express.
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