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Formula: Cu 55/Ni 45
Form: Rod
Material: Constantan®
Commodity: Alloys
Hazard Pictogram: GHS07, GHS08
Constantan® Rods are part of our extensive range of specialized alloy rods. They’re available in 52 variations, with different diameters and lengths to choose from. Constantan® rods showcase excellent spring properties, low electrical resistivity and corrosion resistance. They’re versatile and find applications in various industries, including the manufacturing of springs, thermocouples and electrical resistance wire. With their range of sizes and consistent performance, our Constantan® Rods cater to diverse needs across science and industry.
Technical Data Sheet Safety Data Sheet Tolerance Properties

Health hazard/Hazardous to the ozone layer

Serious health hazard

each

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Tolerances

Rod
Diameter =<10mm ±10%
Diameter >10mm ±5%

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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