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4J50 Rod Controlled Expansion Alloy Bar Fe Ni Precision Alloy Material

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4J50 Rod Controlled Expansion Alloy Bar Fe Ni Precision Alloy Material

Name: 4J50 Rod Controlled Expansion Alloy Bar Fe Ni Precision Alloy Material
Brand: HUONA
Price: 1 USD

Brand Name : HUONA

Model Number : 4J50

Certification : ISO 9001, SGS, RoHS

Place of Origin : China

MOQ : 5KG

Price : NEGOTIATION

Payment Terms : T/T

Supply Ability : 10000KG /WEEK

Delivery Time : A WEEK

Packaging Details : Wooden case, steel strip bundling

Density : 8.2 g/cm³

Thermal Expansion (20–300°C) : 6.0 ×10⁻⁶/°C

Tensile Strength : 450 MPa

Hardness : HB 130–160

Working Temp : 60°C to 400°C

Surface : Bright / Polished / Black

Tolerance : As per ASTM / GB standard

Diameter : 3 mm – 200 mm

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Product Description

4J50 alloy rod is a Fe-Ni controlled expansion alloy containing about 50% nickel.
It is widely used where a stable and low thermal expansion coefficient is required, especially for matching sealing with ceramics and certain glasses.

The alloy provides good machinability, weldability, and reliable sealing performance, making it suitable for electronic packaging, vacuum devices, and aerospace components.

Key Features

Fe-Ni controlled expansion alloy
Stable and low thermal expansion coefficient
Excellent glass/ceramic sealing performance
Good processability and welding properties
Available in rods, wires, and customized forms

Typical Applications

Glass-to-metal and ceramic-to-metal seals
Electronic packaging housings
Semiconductor device supports
Vacuum devices and relays
Aerospace instruments and precision devices

Chemical Composition (%)

Element	Content
Fe	Balance
Ni	~50%
Mn, Si, C, etc.	Minor

Physical and Performance Properties

Property	Typical Value
Density	~8.2 g/cm³
Thermal Expansion (20–300°C)	~6.0 ×10⁻⁶/°C
Tensile Strength	≥ 450 MPa
Hardness	HB 130–160
Working Temp	-60°C to 400°C
Standard	GB/T, ASTM, IEC

Available Specifications

Item	Range
Diameter	3 mm – 200 mm
Length	≤ 6000 mm
Tolerance	As per ASTM / GB standard
Surface	Bright / Polished / Black
Packaging	Wooden case, steel strip bundling
Certification	ISO 9001, SGS, RoHS
Origin	China (OEM/ODM service available)

Product Tags:

4J50 Rod Controlled Expansion Alloy Bar

Precision Alloy Bar

4J50 Rod Controlled Expansion Alloy Bar Fe Ni Precision Alloy Material Images

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