Constantan® Foil

Formula: Cu 55/Ni 45

Form: Foil/Film/Sheet

Material: Constantan®

Commodity: Alloys

Constantan® Foils are range of copper-nickel alloy foils available in 84 variations. They provide unique properties like low electrical resistivity, high thermal conductivity and resistance to corrosion. These properties make Constantan® Foils useful for applications such as thermocouples, resistance strain gauges and springs. Thanks to the combination of excellent properties and availability in foil form, Constantan® is a versatile engineering material for electrical, thermal and mechanical applications.

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Technical Data Sheet Safety Data Sheet Tolerance Properties

each

Tolerances

Foil/Film/Sheet

Thickness	<0.01mm	±25%
Thickness	0.01mm - 0.05mm	±25%
Thickness	>0.05mm	±10%

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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Constantan® Foil

Tolerances

Material Properties for Alloys