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Copper nickel manufacturer and Supplier in India

What is Copper nickel?

Reputed for excellent corrosion resistance in marine conditions, this material gets widely used in electronics, power plants, and shipping. Copper nickel can contain up to 70% or 90% copper with iron and manganese.

Cunifer operates in heat exchangers, condensers, desalination plants, and aircraft and automobile components. It is also indispensable in seawater cooling and firewater applications.

Copper nickel supplier in India


Specifications of copper nickel


Material Melting point Boiling point
Copper nickel 2031-2255 °F N/A
Density Electrical resistivity Tensile strength
8.5-8.95 g/cm3 3.8 x 10-8 Ω·m 267-624 MPa
Thermal expansion Poisson's ratio Heat of fusion
16-17 W/m·K 0.34-0.35 220-240 kJ/kg

What are the properties of copper nickel alloys? How do they differ from other copper alloys?

These alloys are strong, non-bacterial, and fatigue resistant. the tensile strength of a 70-30 Cu Ni alloy can be as high as 517 MPa. the metallurgical properties of cupronickel are not lost even at elevated or cryogenic temperatures.

Desirable thermal conductivity and expansion rate make these alloys ideal for electrical and electronic applications like light current switches. another favorable characteristic is top-notch ductility after annealing, making them easy to work with.

The resistance of nickel–copper alloys to aqueous corrosion (even in speedy flow) is the best among all copper alloys. however, a copper and nickel mix is not as hardy as other combinations like beryllium-copper. alloying nickel and silver with copper shows improved resistance to tarnishing and stress-corrosion cracking.

We provide high-quality copper and nickel product at lowest price

How does the anti-fouling property of Copper nickel alloys compare to other materials commonly used in marine environments? Which factors influence their effectiveness?

Biofouling, or the accumulation of marine organisms on marine components, poses performance problems. A cupro nickel alloy displays commendably low rates of macrofouling. the release of copper ions controls the biofouling resistance since these ions are hostile to marine organisms.

Zinc and silver also get used to prevent biofouling. the former primarily targets algae, while silver makes the microbial cells more permeable. but what makes a copper nickel alloy superior is how the adherent cuprous oxide layer offers sustainable, long-term protection.

This property of Cuni can get impacted by the temperature and salinity. light and turbidity also play a pivotal role, as do invasion or competition by other species like barnacles. ongoing research focuses on environment-friendly, toxin-free alternatives, like natural materials isolated from algae.

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Material testing of cupro nickel


  • Visual inspection
  • Raw material testing
  • Radiographic testing
  • Ultrasonic testing
  • Magnetic particle testing
  • Eddy current testing
  • Penetrant testing
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Chemical compositions of cunifer


Grade Mn Cu Pb Fe Ni Zn
90/10 1.0 max 88.6 min 0.5 max 1.8 max 9-11 max 1 max
70/30 1 max 65.0 min 0.5 max 0.4-1.0 29-33 1 max
To check the electric resistivity chart of nickel–copper alloys, contact us

Mechanical properties of copper and nickel


Grade Melting point Density Tensilestrength Elongation Yieldstrength(0.2%Offset)
90/10 2260°F 8.8g/cm3 50000 PSi 30% 20000PSi
70/30 2260°F 0.323 lb/in3 at 68°F 50000 PSi 30% 20000PSi

Equivalent properties of cu ni alloy


Grade UNS Werkstoff Nr.
90/10 C70600 2.0872
70/30 C71500 2.0882

Electric resistivity of nickel–copper alloys


Alloy identification Electrical resistivity in Ω·mm2/m (20 °C) Electrical resistivity in Ω·mm2/m (200 °C) Electrical resistivity in Ω·mm2/m (100 °C) Electrical resistivity in Ω·mm2/m (300 °C) Electrical resistivity in Ω·mm2/m (500 °C) Electrical resistivity in Ω·mm2/m (400 °C)
CuNi10 0.15 0.162 0.156 0.169 - 0.175
CuNi6 0.1 0.114 0.107 0.123 - -
CuNi23-Mn 0.3 0.315 0.308 0.323 0.339 0.331
CuNi44 0.49 0.49 0.49 0.49 0.49 0.49
CuNi2 0.05 0.064 0.057 - - -
CuNi30-Mn 0.4 0.41 0.404 0.417 0.432 0.424