Copper Nickel
What is Copper Nickel?
Copper-nickel (also known as cupronickel) is an alloy of copper that contains nickel and strengthening elements, such as iron and manganese. It is widely employed in the marine environment because of their highly effective resistance to seawater corrosion, low macrofouling rates, and fabricability. They have been serving for at least 60 years to not only address technological advancements but as well continue offering exceptional service.
What are the types of Copper Nickel?
The basic copper-nickel alloying system is simple, improving on copper’s strength and corrosion resistance while maintaining a high inherent resistance to biofouling. Alloys of binary copper-nickel are a convenient substance throughout their full range; they contain an α face-centered cubic lattice. Adding nickel to copper increases the strength of the alloy and increases its corrosion protection. Alloys containing more than 10% nickel, as well as those which contain more chromium, aluminum, and tin, are chosen for spaceflight applications due to their advanced engineering properties, extreme resistance to flow, frictional wear, galling, and corrosion.
How is Copper Nickel made?
A method for creating copper-nickel alloys that contain nickel oxide, in which nickel oxide is produced in a graphite-arc furnace and the melt containing about 0.5 weight percent carbon is produced from it. The molten is used to a temperature of about 1700° C, then preheated copper is reintroduced. The mineral can be firmly or air pressure pressed, preferably after the degassing the vacuum procedure.
Countries We Supply Copper Nickel To
Steelco Metal & Alloys supply and distribute Copper Nickel products to countries like:
 United States
 EuropeÂ
Middle East
Africa
and more…
Mechanical Properties of Copper Nickel
| Alloy | EN No or Other Identification | UNS No | 0.2% Proof Strength N/mm2 | Tensile Strength N/mm2 | Elongation % | Hardness HV |
|---|---|---|---|---|---|---|
|
Cu-Ni |
CW352H
CW353H (tube only)
CW354H
|
C70600
C71640
C71500
|
100-350
150 min
130-450
|
290-420
420 min
350-520
|
12-40
30min
12-35
|
80-160
110
90-190
|
|
Cu-Ni-Cr |
Def Stan 02-824 Part 1
-
|
-
C72200
|
300 min
110 min
|
480 min
310 min
|
18 min |
- |
|
Cu-Ni-Al |
Cu-15Ni-3Al |
- |
555-630 |
770-850
|
12min
|
229-240
|
|
Cu-Ni-Sn |
Cu-15Cr-8Sn |
C72900 |
620-1030 |
825-1100 |
2-15 |
272-354 |
Physical Properties of Copper Nickel
| Units | 90-10 | 70-30 | 66-30-2-2 | |
|---|---|---|---|---|
|
Density |
kg/dm3 |
8.90 |
8.95 |
8.86 |
|
Melting Range |
°C |
1100-1145 |
1170-1240 |
- |
|
Specific Heat |
J/kg °K |
377 |
377 |
377 |
|
Thermal Conductivity |
W/m°K |
40 |
29 |
25 |
|
Coeff. of Linear Expansion
10-300°C
|
10-6/°K |
17 |
16 |
15.5 |
|
Electrical Resistivity |
microhm. cm |
19 |
34 |
50 |
|
Modulus of Elasticity |
GPa |
135 |
152 |
156 |
|
Modulus of Rigidity |
GPa |
50 |
56 |
- |
Industrial Application of Copper Nickel
Copper Nickel is highly versatile and has excellent resistance to heat and corrosion properties. As a result, it can be used across a wide range of industries, such as:
- Heat Exchangers
- Marine Industries
- Turbines in Nuclear Power Plants
- Chemical Industries
- Oil & Gas Industries
- Automotive & Transportation Industries
Benefits of Copper Nickel
Excellent resistance to heat
Copper-nickel alloys demonstrate remarkable thermal resistance, due to their ability to form a protective oxide layer when exposed to heat. This oxide layer acts as an insulator, helping to prevent further oxidation of the alloy’s surface and thus allowing it to maintain its structural integrity at elevated temperatures. The superior heat resistant properties of copper-nickel alloys can be attributed to their high melting point, which is typically around 1400°C.
Ideal resistance to corrosion and biofouling
Copper-nickel alloys possess ideal resistance to corrosion and biofouling, due to their highly impermeable oxide films which form on the surface. This oxide film, created by electrochemical processes, is composed of insoluble nickelate compounds which are resistant to the penetration of aggressive environments. Furthermore, this oxide film is practical in comparison to other metallic systems because it can be renewed without significant material loss when exposed to corrosive conditions.
Easy to Fabricate
Copper nickel is a relatively straightforward alloy to fabricate. Its malleability and readily available constituent metals make it an ideal candidate for forming into complex shapes, such as intricate pipes and valves. The uniformity of the alloy’s composition also renders it easier to work with than other alloys, due to its homogeneity.
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FAQ
Copper-nickel (also known as cupronickel) is an alloy of copper that contains nickel and strengthening elements, such as iron and manganese. It is widely employed in the marine environment because of their highly effective resistance to seawater corrosion, low macrofouling rates, and fabricability.
Their high strength density, heat resistance and machinability make them ideal for a wide variety of applications like hydraulic tubing, including brake tubing. Seawater cooling and firewater systems, heat exchangers, condensers and piping, platform riser and leg sheathing, boat hulls, oil coolers, hydraulic tubing.
Copper nickel is a 90% copper, 10% nickel alloy that also contains small but important additions of iron and manganese to enhance overall strength and corrosion resistance and it is available in grades C70600, CW352H, C71500, CW354H.
The price of 1kg Copper Nickel in India is around Rs 400/-* To know more about price contact usÂ
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