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4J33 Rod Controlled Expansion Alloy Bar Fe Ni Co Alloy Precision Material

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4J33 Rod Controlled Expansion Alloy Bar Fe Ni Co Alloy Precision Material

Name: 4J33 Rod Controlled Expansion Alloy Bar Fe Ni Co Alloy Precision Material
Brand: HUONA
Price: 1 USD

Brand Name : HUONA

Model Number : 4J33

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) : 5.0 ×10⁻⁶/°C

Tensile Strength : ≥ 450 MPa

Hardness : HB 130–160

Tolerance : As per ASTM / GB standard

Packaging : Wooden case, steel strip bundling

Origin : China (OEM/ODM service available)

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Product Description

4J33 alloy rod is a Fe-Ni-Co controlled expansion alloy containing about 33% nickel and cobalt. It is specially developed for applications requiring stable thermal expansion to match materials such as ceramics or glass.

This alloy combines good mechanical properties, excellent machinability, and stable expansion behavior, making it widely used in electronic packaging, vacuum devices, and precision instruments.

4J33 Rod Controlled Expansion Alloy Bar Fe Ni Co Alloy Precision Material

Key Features

Fe-Ni-Co controlled expansion alloy
Stable thermal expansion coefficient
Excellent hermetic sealing performance with glass/ceramic
Good processability and weldability
Available in rods, wires, sheets, and customized forms

Typical Applications

Electronic packaging and sealing
Glass-to-metal and ceramic-to-metal seals
Precision electronic components
Vacuum tubes and relay parts
Aerospace and instrumentation industry

Chemical Composition (%)

Element	Content
Fe	Balance
Ni	~33%
Co	~17%
Mn, Si, C, etc.	Minor

Physical and Performance Properties

Property	Typical Value
Density	~8.2 g/cm³
Thermal Expansion (20–300°C)	~5.0 ×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)

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