Copper Nickel 70/30 Round Bar
Alloy 70/30 bar 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
Cu Ni 70/30 round bar possesses good mechanical properties and exhibits high resistance to corrosion in any media, especially seawater. Cupro Nickel 70/30 bar 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 |
206 |
15 |
The small addition of iron provides Cupro Nickel 70 / 30 bar 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 |
Cu Ni 70/30 round bar exhibits superb resistance to attacks from steam, boiler feed-water and freshwater. Cupro Nickel 70/30 or UNS C71500 can withstand attacks from sulfuric acid, phosphoric acid and also from mild organic acids.
Specification
The Specification for Cupro Nickel 70/30 bar as per astm Standard is ASTM B 425/ASME SB-425, they are categorised into different form and shape such as ICupro Nickel 70/30 Round Bar, Rod, Channel Bar, T-Bar, Flat Bar, Blocks, Square, bar, Triangle, Threaded, Hex (A/F), Profiles, Half Ingot, Billet, I/H Bar, etc.
When considering wrought stainless round bars, material shall be furnished in the following way such as Hot-worked, Hot-worked and Annealed, Hot-worked- Annealed and cold worked or Hot-worked-Annealed and heat treated.
Round bars depending upon their treatment and their use and application they can also be available in different surface finishes such as Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish, 2B, 2D, etc.
Applications
1: Off-Shore Oil Drilling Companies
2: Power Generation
3: Petrochemicals
4: Gas Processing
5: Specialty Chemicals
6: Pharmaceuticals
7: Pharmaceutical Equipment
8: Chemical Equipment
9: Sea Water Equipment
10: Heat Exchangers
11: Condensers
12: Pulp and Paper Industry
