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4J50 Wire FeNi50 Alloy Wire ASTM F15 Soft Magnetic Sealing Wire for Glass to Metal Seals and Electronic Components
4J50 Wire FeNi50 Alloy Wire ASTM F15 Soft Magnetic Sealing Wire for Glass to Metal Seals and Electronic Components
Specifications
Brand Name :
HUONA
Model Number :
WIRE
Certification :
ISO 9001, ROHS, EN 10204 3.1
Place of Origin :
CHINA
MOQ :
1KG
Price :
Bargain
Payment Terms :
T/T
Supply Ability :
1500tons/Year
Delivery Time :
A WEEK
Packaging Details :
DIN Spool, Carton, Wooden Case
Model NO. :
alloy 52
Transport Package :
DIN Spool, Carton, Wooden Case
HS Code :
7505220000
Specification :
Customized
Origin :
Jiangsu, China
Production Capacity :
1500tons/Year
Country of Origin :
China (OEM and logo customization available)
Description

Product Description

4J50 wire is a precision iron-nickel soft magnetic alloy containing approximately 50% nickel and is equivalent to ASTM F15 standard. It is designed for applications requiring a close thermal expansion match with borosilicate glass and ceramic materials, making it ideal for glass-to-metal sealing.

This alloy wire offers excellent soft magnetic properties, good mechanical stability, and consistent thermal performance. It is widely used in electronic tubes, relays, vacuum devices, sensors, and microelectronic packaging. 4J50 wire is often referred to as a Kovar-type sealing material and is compatible with a wide range of high-reliability electronic and aerospace applications.

4J50 Wire FeNi50 Alloy Wire ASTM F15 Soft Magnetic Sealing Wire for Glass to Metal Seals and Electronic Components

Key Features

  • Matched thermal expansion to borosilicate hard glass

  • Stable magnetic and mechanical performance

  • Excellent glass-sealing and vacuum compatibility

  • Smooth surface and high dimensional precision

  • Good formability, weldability, and corrosion resistance

  • Low outgassing for vacuum or hermetically sealed applications

Typical Applications

  • Glass-to-metal sealed headers and pins

  • Vacuum tubes, electronic relays, and sensors

  • IC package leads and transistor enclosures

  • Aerospace instrumentation and feedthroughs

  • Medical electronics and hermetically sealed devices

  • Thermal expansion matched sealing for glass/ceramic components

Chemical Composition (%)

Element Typical Content (%)
Nickel (Ni) 49.0 – 51.0
Cobalt (Co) ≤ 0.50
Manganese (Mn) 0.30 – 0.60
Silicon (Si) ≤ 0.30
Carbon (C) ≤ 0.05
Sulfur (S) ≤ 0.02
Phosphorus (P) ≤ 0.02
Iron (Fe) Balance

Mechanical Properties (Annealed Condition)

Property Typical Value
Tensile Strength ≥ 450 MPa
Yield Strength (0.2%) ≥ 250 MPa
Elongation ≥ 30%
Hardness ≤ 160 HV
Density ~8.2 g/cm³
Thermal Expansion (20–300°C) ~5.0 × 10⁻⁶ /°C
Max Service Temp ~500°C (932°F)

Available Specifications

Item Details
Wire Diameter Range 0.02 mm – 3.0 mm
Form Spools, coils, cut lengths
Surface Finish Bright, oxide-free, annealed
Standards ASTM F15, GB/T 14986, YB/T 5231
Condition Annealed (soft), hard drawn
Packaging Plastic spool 1 kg – 15 kg, vacuum packed available
Certification ISO 9001, ROHS, EN 10204 3.1
Country of Origin China (OEM and logo customization available)

Packaging & Shipping

  • Vacuum packaging or plastic spools

  • Anti-corrosion treatment

  • Air/sea/express delivery available

  • Delivery time: 7–15 business days


  • 4J50 Wire FeNi50 Alloy Wire ASTM F15 Soft Magnetic Sealing Wire for Glass to Metal Seals and Electronic Components
    4J50 Wire FeNi50 Alloy Wire ASTM F15 Soft Magnetic Sealing Wire for Glass to Metal Seals and Electronic Components
    4J50 Wire FeNi50 Alloy Wire ASTM F15 Soft Magnetic Sealing Wire for Glass to Metal Seals and Electronic Components
    4J50 Wire FeNi50 Alloy Wire ASTM F15 Soft Magnetic Sealing Wire for Glass to Metal Seals and Electronic Components
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4J50 Wire FeNi50 Alloy Wire ASTM F15 Soft Magnetic Sealing Wire for Glass to Metal Seals and Electronic Components

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Product Detail
Brand Name :
HUONA
Model Number :
WIRE
Certification :
ISO 9001, ROHS, EN 10204 3.1
Place of Origin :
CHINA
MOQ :
1KG
Price :
Bargain
Contact Supplier
video
4J50 Wire FeNi50 Alloy Wire ASTM F15 Soft Magnetic Sealing Wire for Glass to Metal Seals and Electronic Components

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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