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Invar® Foil (Light Tight)

Invar® Foil (Light Tight) comes in 105 variations that differ in dimensions, thickness and surface finish. Consisting primarily of iron and nickel, it has an extremely low coefficient of thermal expansion. This makes it ideal for applications that require high dimensional stability under temperature changes, like precision instruments and optical mirrors. Being light tight, this foil blocks visible light transmission, so it can be used when light leakage needs to be prevented in optical devices or light-sensitive electronics.
Thickness: 0.125mm
Temper: Half Hard
Length 1: 150mm
Length 2: 150mm
Technical Name: Invar© - Controlled Expansion Alloy
Formula: Fe64/Ni36
Density: 8g/cm³
UOM Code: 006-117-27
SKU: 1000000809
Product Code: FE02-FL-000165

Health hazard/Hazardous to the ozone layer

Serious health hazard

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Technical Data Sheet
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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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