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Copper Nickel Tube

Copper nickel tube

What is a Copper Nickel Tube?

These tubes are known for superb corrosion resistance in marine and harsh conditions. A copper nickel tube comprises 70-90% copper with 30 or 10% nickel, with the former being sturdier and more resilient. These impact-resistant tubes don’t suffer from hydrogen embrittlement or cavitation, which ails many alternatives.


What are the properties and applications of cupro nickel tubing?

The desirable properties of a cunifer tube include high thermal stability and strength at elevated temperatures. Its corrosion resistance, electrical conductivity, and antibacterial properties are well-admired. It makes a durable, recyclable piping solution that resists biofouling.

Cupro nickel tubing serves heat exchangers, power generation equipment, and firewater systems. Its role in marine industries is particularly appreciable, ranging from seawater cooling and boat hulls to valve components.

Leading Cuni Seamless Tube Supplier in India, Check Specification For Detail Information

Specification of Copper Nickel Tube


Cupro Nickel Seamless Tube Delivery Schedules


Country  Name Madagascar Nigeria Ghana Kenya Angola
 Delivery Time  15-20 in all

Copper Nickel Tube Price Table


Size US AED INR
25.40 mm OD X 1.65 mm Copper nickel alloy tube $ 9.42 AED 34.58 INR 784.88
26.40 mm OD X 2.65 mm Cunifer Welded Tube $ 11.45 AED 42.06 INR 952.39
25.00mm OD X2.11mm Cuni tubing $ 10.45 AED 38.37 INR 869.89
28.00mm OD X2.11mm Copper Nickel Tubing $ 12.48 AED 45.79 INR 1012.31
1/4 NPT (M) X 3/8 Copper nickel Seamless Tubing $ 29.49 AED 108.38 INR 2453.24
3/8 -9.52MM OD X 0.9MM THK $ 35.77 AED 131.27 INR 2976.90
1.00 OD x 0.049 X 44 FEET 2 INCH LENGTH $ 88.69 AED 325.98 INR 7390.10

Manufacturer of Cupro Nickel Welded Pipe in Custom Sizes, Check Size Chart

Sizes of CU-NI Welded Tubes


Form Sizes
Metric US Customary
Copper Nickel Tubes 270 to 1600 mm OD, 2.0 to 10 mm wall thickness 10 to 63" OD, 0.1 to 0.5" wall thickness
Copper Nickel Condenser Tube 8 to 35 mm OD, 0.75 to 2.0 mm wall thickness 0.3 to 1.5" OD, 0.03 to 0.1" wall thickness
Copper Nickel Coiled Tube 6 to 22 mm OD, 0.5 to 3 mm wall thickness 0.25 to 1" OD, 0.02 to 0.12" wall thickness

What are the advantages of using copper nickel for heat exchanger tubes?

The thermal properties of a copper nickel heat exchanger tube adapt conveniently to heat exchangers. It boasts a thermal conductivity of 50 (measured in W/mK), exhibiting stability at challenging temperatures.

Moreover, these pipes unfailingly retain mechanical strength and show a linear expansion coefficient of 17 – perfect for condensers and other heat-based roles.

Types of Cunifer Tubes

Copper nickel seamless tubing

Copper nickel seamless tubing

Cunifer welded tube

Cunifer welded tube

Cuni ERW tube

Cuni ERW tube

Cupro nickel tubing

Cupro nickel tubing

Check Cu Ni Alloy Square Tubing Chemical Composition and Equivalent Properties Below

Copper Nickel Seamless Tubing Chemical Composition






Cupro Nickel ERW Tube Equivalent Grade


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

What are the benefits of using copper nickel tubing in HVAC systems?

HVAC systems (heating, ventilation, and air conditioning) frequently use a CuNi welded tube because of its high thermal conductivity. The material conducts heat well and cools effectively through dissipation.

Other benefits of this piping for HVAC systems are resistance to oxidation/corrosion and high durability. It extends the useful life of the air-conditioning units

Refer Copper Nickel Alloys Annealed Tube Pressure Ratings Before Purchasing the Materials

Cu-Ni Annealed Tube Pressure Ratings


OD 10 BAR
WALL THK Pressure Ratings Weight (THEORETICAL)
Nominal ACTUAL
DN Inch mm mm   KG/M
900 36 914 8 10 203.57
10 0.38 16 1 14 0.42
450 18 457.2 4 10 50.91
15 0.5 20 1 14 0.53
125 5 133 2.5 10 9.16
25 1 30 1.5 10 1.2
350 14 368 4 10 40.9
32 1.25 38 1.5 10 1.54
50 2 57 1.5 10 2.34
250 10 267 3 10 22.24
65 2.5 76.1 2 14 4.16
100 4 108 2.5 14 7.41
150 6 159 2.5 10 10.99
80 3 88.9 2 10 4.88
175 7 193.7 2.5 10 13.43
200 8 219.1 3 10 18.21
300 12 323.9 4 10 35.94
40 1.5 44.5 1.5 10 1.81
400 16 4191 4 10 46.62
20 0.75 25 1.5 14 0.99
500 20 508 4.5 10 63.63
  0.25 12 1 10 0.31
600 24 610 5 10 84.96
700 28 711 6 10 118.8
  0.125 10 1 10 0.26
800 32 813 6 10 135.99

How does the speciality of CuNi seamless tubes contribute to their resistance to pitting, crevice corrosion, and stress corrosion cracking?

The primary advantage of a cuni seamless tube is improved strength and fatigue resistance since it lacks joints or seams. It protects against general or localised corrosion. In chlorinated environments, it safeguards from SCC (stress-corrosion cracking).

Copper Nickel welded tube Mechanical properties


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

What are the key factors contributing to the strength and durability of CuNi tubing?

The premium characteristics of copper nickel brake tubing derive from its chemical composition: high content of copper and nickel with iron and manganese. Its durability also comes from its antimicrobial and anti-biofouling properties.

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Cupro Nickel Alloy Fabrication Properties


Machinability Rating Coated Metal Arc Welding Soldering Oxyacetylene Welding Butt Weld Gas Shielded Arc Welding Spot Weld Capacity for Being Cold Worked Brazing Capacity for Being Hot Formed Seam Weld Joining Technique
20 Good Excellent Fair Excellent Excellent Good Good Excellent Good Good Suitability