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Expansion 4J50 Pipes - Controlled Expansion Alloy Pipes with Controlled Thermal Expansion for Glass-to-Metal Sealing and High Tensile Strength
Expansion 4J50 Pipes - Controlled Expansion Alloy Pipes with Controlled Thermal Expansion for Glass-to-Metal Sealing and High Tensile Strength
Specifications
Brand Name :
NikTech
Model Number :
4J50
Certification :
ISO 9001:2015
Place of Origin :
China
MOQ :
150kgs
Price :
Negotiatable
Payment Terms :
L/C,T/T,Western Union
Supply Ability :
300 Ton per Month
Delivery Time :
2-30days
Packaging Details :
Wooden Crate
Mechanicalstrength :
High tensile strength
Tensile Strength :
550-750 MPa
Alloy :
Nickel Copper Alloy
Weldability :
Good
Type :
Nickel Strips
Corrosionresistance :
Good
Density :
Varies depending on specific alloy
Thermal Conductivity :
10-20 W/mK
Description
Expansion 4J50 Pipes Controlled Expansion Alloy

Expansion 4J50 Pipes are precision iron-nickel alloy pipes engineered for applications requiring controlled thermal expansion and reliable dimensional stability across varying temperature conditions. Containing approximately 50% nickel, these pipes provide a coefficient of thermal expansion that closely matches specific hard glasses and ceramic materials, making them highly suitable for glass-to-metal sealing assemblies and precision electronic components.

Unlike conventional stainless or nickel alloys that prioritize corrosion resistance or high-temperature strength, Expansion 4J50 Pipes are optimized for thermal compatibility and expansion control. Their stable metallurgical structure maintains dimensional accuracy during repeated heating and cooling cycles, which is critical in electronic packaging, vacuum systems, and instrumentation equipment.

Specifications
Parameter Value
Outside Diameter 4 mm - 114 mm
Wall Thickness 0.5 mm - 12 mm
Length Up to 6000 mm
Surface Bright Annealed, Pickled
Form Seamless Pipe / Welded Pipe
Standards GB/T 15007, YB/T 5231
Chemical Composition
Element Content (%)
Nickel (Ni) 49.0 - 51.0
Iron (Fe) Balance
Carbon (C) ≤ 0.05
Manganese (Mn) ≤ 0.80
Silicon (Si) ≤ 0.30
Phosphorus (P) ≤ 0.02
Sulfur (S) ≤ 0.02
Chromium (Cr) ≤ 0.20
Mechanical Properties
Property Value
Tensile Strength ≥ 490 MPa
Yield Strength ≥ 240 MPa
Elongation ≥ 30%
Hardness ≤ 160 HB
Physical Properties
Property Value
Density 8.15 g/cm³
Melting Range 1430 - 1450°C
Thermal Conductivity 15.5 W/m*K
Elastic Modulus 147 GPa
Electrical Resistivity 0.49 µΩ*m
Coefficient of Thermal Expansion (20-300°C) Approx. 9.5 × 10⁻⁶/K
Key Features
  • Controlled thermal expansion characteristics
  • Excellent compatibility with hard glass sealing systems
  • Stable dimensions during thermal cycling
  • Suitable for vacuum and electronic applications
  • Good fabrication and machining performance
  • Reliable long-term sealing integrity
Applications
Glass-to-Metal Sealing Systems
Used in hermetic sealing assemblies and electronic packaging components
Vacuum Equipment
Applied in vacuum chambers, feedthroughs, and scientific instruments
Precision Instrumentation
Suitable for sensors, measurement devices, and control systems
Electronic Components
Used in electronic housings requiring matched expansion properties
Telecommunications Equipment
Applied in specialized sealing and thermal matching applications
Frequently Asked Questions
What are Expansion 4J50 Pipes mainly used for?
They are primarily used in glass-to-metal seals, vacuum devices, and precision electronic assemblies.
Why are Expansion 4J50 Pipes suitable for sealing applications?
Their thermal expansion characteristics closely match specific hard glasses, reducing thermal stress.
Do Expansion 4J50 Pipes have good dimensional stability?
Yes, they maintain stable dimensions during repeated temperature changes.
Can Expansion 4J50 Pipes be machined into precision components?
Yes, the alloy offers good fabrication and machining characteristics.
Are Expansion 4J50 Pipes used in electronic industries?
Yes, they are widely used in electronic packaging and hermetic sealing applications.
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Expansion 4J50 Pipes - Controlled Expansion Alloy Pipes with Controlled Thermal Expansion for Glass-to-Metal Sealing and High Tensile Strength

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Product Detail
Brand Name :
NikTech
Model Number :
4J50
Certification :
ISO 9001:2015
Place of Origin :
China
MOQ :
150kgs
Price :
Negotiatable
Contact Supplier
Expansion 4J50 Pipes - Controlled Expansion Alloy Pipes with Controlled Thermal Expansion for Glass-to-Metal Sealing and High Tensile Strength

Wuxi Nickel Alloy New Material Technology Co., Ltd

Verified Supplier
2 Years
jiangsu, wuxi
Since 2002
Business Type :
Manufacturer
Main Products :
Monel Alloy, Inconel Alloy, Resistance Alloy
Total Annual :
20000000-80000000
Employee Number :
50~500
Certification Level :
Verified Supplier
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