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Formula: Fe 64/Ni 36
Form: Rod
Material: Invar®
Commodity: Alloys

Invar® Rod

Invar® Rod (Fe 64/Ni 36, Invar® 36), a controlled expansion iron-nickel alloy, exhibits an exceptionally low coefficient of thermal expansion (CTE), making it essential for applications requiring extreme dimensional stability. It is widely used in aerospace structural supports, interferometer frames, and satellite instruments, where temperature fluctuations could otherwise lead to misalignment. In semiconductor manufacturing, Invar® Rod ensures precision in wafer alignment and tooling, minimizing thermal distortion in high-accuracy environments. Additionally, its high strength, corrosion resistance, and machinability make it suitable for scientific instruments, cryogenic storage vessels, and metrology systems used in laboratory research and advanced engineering industries.
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Serious health hazard

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Tolerances

Rod
Diameter =<10mm ±10%
Diameter >10mm ±5%

Material Properties for Alloys

Mechanical Properties
Electrical Properties
Magnetic Properties
Thermal Properties
Physical Properties
Mechanical Properties
Element Value
Hardness - Brinell 160
Elongation at break( % ) 45
Modulus of elasticity( GPa ) 140-150
Tensile strength( MPa ) 450-590
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 75-85
Magnetic Properties
Element Value
Curie temperature( C ) 279
Thermal Properties
Element Value
Melting point( C ) 1427
Specific heat( J K⁻¹ kg⁻¹ ) 515@23°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 13@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 1.7-2@20-90°C
Physical Properties
Element Value
Density( gcm⁻³ ) 8

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