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.

Wishlist

Technical Data Sheet Safety Data Sheet Tolerance Properties

Health hazard/Hazardous to the ozone layer

Serious health hazard

each

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