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Constantan® Foil (Light Tight)

Formula: Cu 55/Ni 45
Form: Foil (Light Tight)
Material: Constantan®
Commodity: Alloys
Light Tight: Light Tight
Hazard Pictogram: GHS07, GHS08
Constantan® Foil (Light Tight) is a copper-nickel alloy known for its low electrical resistivity, high thermal conductivity and resistance to corrosion. Available in 74 variations, its stability and conductivity make it well suited to precision resistors as well as thermocouples for temperature measurement. Being light tight, it also blocks visible light transmission, making it useful for applications like shielding photosensitive components. With a broad selection of sizes and thicknesses, our Constantan® Foil (Light Tight) range support prototyping and small-scale production across electronics, sensors and other fields.
Technical Data Sheet Safety Data Sheet Tolerance Properties

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Material Properties for Alloys

Mechanical Properties
Element Value
Hardness - Brinell 100-300
Elongation at break( % ) 45
Modulus of elasticity( GPa ) 162
Izod impact strength( J m⁻¹ ) 107
Tensile strength( MPa ) 400-590
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 52
Temperature coefficient( K⁻¹ ) 0.00002+/-
Thermal Properties
Element Value
Maximum use temperature in air( C ) 500
Melting point( C ) 1225-1300
Thermal conductivity( W m⁻¹ K⁻¹ ) 19.5@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 14.9@20-100°C
Physical Properties
Element Value
Density( gcm⁻³ ) 8.9

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