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4J36 Rod Invar Alloy Bar Fe Ni Alloy Controlled Expansion Material

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4J36 Rod Invar Alloy Bar Fe Ni Alloy Controlled Expansion Material

Name: 4J36 Rod Invar Alloy Bar Fe Ni Alloy Controlled Expansion Material
Brand: HUONA
Price: 1 USD

Brand Name : HUONA

Model Number : 4J36

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

Diameter : 3 mm – 200 mm

Length : ≤ 6000 mm

Tolerance : As per ASTM / GB standard

Surface : Bright / Polished / Black

Property Typical Value Density ~8.1 g/cm³ Thermal Expansion (20–100°C) : ~1.2 ×10⁻⁶/°C

Tensile Strength : ≥ 450 MPa

Hardness : ~HB 120–150

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Product Description

4J36 alloy rod, also known as Invar 36, is a low expansion Fe-Ni alloy containing about 36% nickel. It is widely recognized for its extremely low coefficient of thermal expansion (CTE) around room temperature.

This property makes 4J36 ideal for applications requiring dimensional stability under temperature fluctuations, such as precision instruments, measuring devices, aerospace, and cryogenic engineering.

4J36 Rod Invar Alloy Bar Fe Ni Alloy Controlled Expansion Material

Key Features

Fe-Ni controlled expansion alloy (Ni ~36%)
Very low thermal expansion coefficient
Excellent dimensional stability
Good machinability and weldability
Available in rods, wires, sheets, and custom forms

Typical Applications

Precision measuring instruments
Optical and laser system components
Aerospace and satellite structures
Electronic packaging requiring dimensional stability
Cryogenic engineering devices
Standards of length, balance springs, precision pendulums

Chemical Composition (%)

Element	Content
Fe	Balance
Ni	~36%
C, Mn, Si, etc.	Minor

Physical and Performance Properties

Property	Typical Value
Density	~8.1 g/cm³
Thermal Expansion (20–100°C)	~1.2 ×10⁻⁶/°C
Tensile Strength	≥ 450 MPa
Hardness	~HB 120–150
Working Temp	-200°C to 200°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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