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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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Expansion 4J50 Pipes - Controlled Expansion Alloy Pipes with Controlled Thermal Expansion for Glass-to-Metal Sealing and High Tensile Strength
  • name

Expansion 4J50 Pipes - Controlled Expansion Alloy Pipes with Controlled Thermal Expansion for Glass-to-Metal Sealing and High Tensile Strength

MOQ: 150kgs
Price: Negotiatable
Standard Packaging: Wooden Crate
Delivery Period: 2-30days
Payment Method: L/C,T/T,Western Union
Supply Capacity: 300 Ton per Month
Detail Information
Product Description
Detail Information
Place of Origin
China
Brand Name
NikTech
Certification
ISO 9001:2015
Model Number
4J50
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
Product 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.
Tags: 

expansion alloys,  

super invar,  

invar steel

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Products
PRODUCTS DETAILS
Products

Monel Alloy

Inconel Alloy

Resistance Alloy

Expansion Alloys

Incoloy Alloy

Hastelloy Alloy

Cobalt Alloy

Soft Magnetic Alloy

Pure Nickel

Stainless Steel

Noble Metal

Nickel Based Welding Products

High Temperature Alloy

Others

Beryllium Copper Alloy

Nickel Foam
Expansion 4J50 Pipes - Controlled Expansion Alloy Pipes with Controlled Thermal Expansion for Glass-to-Metal Sealing and High Tensile Strength
  • name
Expansion 4J50 Pipes - Controlled Expansion Alloy Pipes with Controlled Thermal Expansion for Glass-to-Metal Sealing and High Tensile Strength
MOQ: 150kgs
Price: Negotiatable
Standard Packaging: Wooden Crate
Delivery Period: 2-30days
Payment Method: L/C,T/T,Western Union
Supply Capacity: 300 Ton per Month
Detail Information
Product Description
Detail Information
Place of Origin
China
Brand Name
NikTech
Certification
ISO 9001:2015
Model Number
4J50
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
Minimum Order Quantity:
150kgs
Price:
Negotiatable
Packaging Details:
Wooden Crate
Delivery Time:
2-30days
Payment Terms:
L/C,T/T,Western Union
Supply Ability:
300 Ton per Month
Product 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.
Tags: 

expansion alloys,

super invar,

invar steel

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