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Invar® Foil

Invar® Foils are part of Goodfellow’s wide range of metal foils. Invar® alloy contains nickel and iron, giving it low thermal expansion properties. Invar® Foils are used in applications that require dimensional stability like precision instruments, optical assemblies and aircraft components. With 163 variations available, the ability to tailor the thermal expansion properties of these foils makes them an ideal choice for reducing thermal stresses and strains in sensitive devices and assemblies.
Formula: Fe64/Ni36
Temper: Annealed
Thickness: 2.5mm
Length 1: 10mm
Length 2: 10mm
Surface Finish: Polished On Both Sides
UOM Code: 616-288-97
SKU: 1000094452
Product Code: FE02-SH-000122

Tolerances

Foil/Film/Sheet
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±25%
Thickness >0.05mm ±10%

Health hazard/Hazardous to the ozone layer

Serious health hazard

Tolerances

Foil/Film/Sheet
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±25%
Thickness >0.05mm ±10%
Technical Data Sheet
Safety Data Sheet
$148.31
each
  • Buy 5 for $120.13 each and save 19%
  • Buy 10 for $109.75 each and save 26%
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Material Properties for Alloys

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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