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Formula: Cu 55/Ni 45
Form: Disk
Material: Constantan®
Commodity: Alloys
Hazard Pictogram: GHS07, GHS08
The Constantan® Disk is offered in 1235 variations. Constantan is a copper-nickel alloy low electrical resistivity, high thermal conductivity and excellent resistance to corrosion. These properties make it ideal for applications like strain gauges, thermocouples, and resistance thermometers in scientific instrumentation and industrial processing. With so many options available, our Constantan disks meet the specific needs of research, development and manufacturing projects.
Technical Data Sheet Safety Data Sheet Tolerance Properties

Health hazard/Hazardous to the ozone layer

Serious health hazard

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Tolerances

Disk
Thickness >0.05mm ±10%
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±15%

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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