Copper Nickel 70/30 Flat
Cupro Nickel 70/30 flat and Cupro Nickel 70/30 flat is a copper and nickel alloy with additions of iron and manganese. These elemental additions make it even more resistant to corrosion and erosion and with slightly improved strength level than alloy 90/10, making it suitable for more demanding applications.
Chemical composition
|
GRADE |
Cu |
Ni |
Fe |
Mn |
Pb |
Zn |
|
|---|---|---|---|---|---|---|---|
|
Cu-Ni 70/30 |
Min |
67 |
25 |
0.4 |
– |
– |
– |
|
Max |
30 |
30 |
0.1 |
1 |
0.05 |
1 |
Properties
Copper Nickel 70/30 flat possess good mechanical properties and exhibit high resistance to corrosion in any media especially seawater. Cu-Ni 70/30 flat and Cu-Ni 70/30 flat have outstanding pitting and corrosion resistance in marine atmospheres.
Mechanical Properties
|
Grade |
Tensile Strength |
Yield Strength |
Elongation |
|---|---|---|---|
|
[MPA] |
[MPA] |
(% in 50mm) min |
|
|
Cu-Ni 70/30 |
345 |
140 |
30 |
The small addition of iron provides Cupro Nickel 70 / 30 flat or UNS C71500 an unexpected resistance to wide ranging corrosion and stress corrosion cracking, making it very appropriate and perfect for the marine or manufacturing industries.
Physical properties
|
Grade |
Density (g/cm3) |
Melting Range °C |
Elastic Modulus (GPa) |
Coeff of Thermal Expansion (μm/m/°C) |
Thermal Conductivity (W/m.K) |
Specific Heat (J/Kg.K) |
Electrical Resistivity (μΩ.cm) |
|---|---|---|---|---|---|---|---|
|
10-300°C |
at 100°C |
0-100°C |
|||||
|
Cu-Ni 70/30 |
8.94 |
1170-1240 |
150 |
16.2 |
29 |
377 |
34 |
Cupro Nickel 70/30 exhibits superb resistance to attacks from steam, boiler feed-water and freshwater. Cu-Ni 70/30 flats or UNS C71500 can withstand attacks from sulfuric acid, phosphoric acid and also from mild organic acids.
Application
Copper Nickel 70/30 Alloy flat has a long and successful history in the marine sector that has since extended to industries including offshore oil and gas, power generation, desalination and cooling plants.
The alloy is also used for seawater service, submarine, offshore fire water systems, heat exchangers, condensers, and areas where high corrosion resistance is required and concern over chloride stress-corrosion cracking prevents the use of stainless steels.
Shalco Industries is a manufacturing company of Flat in India and Global Supplier.
