Nickel Copper Alloys
Nickel Copper Alloys
Cupronickel (also known as copper-nickel) is an alloy of copper that contains nickel and strengthening elements, such as iron and manganese. Due to the specific properties of nickel and copper alloys, they are applied in various domains of industry e.g. coin and medal minting, armaments manufacture, desalination materials, marine engineering, and extensively used in the chemical, petrochemical and electrical industries. Cupronickel is highly resistant to corrosion in seawater. For this reason, it is used for piping, heat exchangers and condensers in seawater systems, marine hardware, and sometimes for the propellers, crankshafts and hulls of premium tugboats, fishing boats and other working boats.
Characteristics of Copper Nickel Alloys:
- Low macrofouling ratesd
- Excellent resistance to seawater corrosion
- Good fabricability
- Good Tensile strength
Shah International supplies the below Copper Nickel Alloys Grades : Cupro Nickel 70/30 , Cupro Nickel 90/10
Cupro Nickel 70/30
UNS Number C71500
Cupro Nickel 70/30 is a copper nickel alloy noted for its excellent resistance to corrosion, erosion and pitting combined with a good strength, workability and weldability. It has enjoyed 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
Cupro Nickel 70/30 Chemical Composition, %:
Cu |
Ni |
Mn |
Balance |
30 |
1 |
Cupro Nickel 70/30 ASTM Specification:
Pipe Smls |
Pipe |
Tube Smls |
Tube |
Sheet / Plate |
Bar |
B466 |
B608 |
B466 |
B543 |
B122 |
B122 |
Mechanical Properties of Cupro Nickel 70/30:
Specification Minima
Tensile Strength |
350 N/mm2 |
Yield |
(0.2 % offset) 125 N/mm2 |
Elongation |
Cupro Nickel 90/10
UNS Number C70600
Cupro Nickel 90/10 is a 90% copper, 10% nickel alloy that also contains small but important additions of iron and manganese to enhance overall strength corrosion resistance. This, combined with high ductility and toughness, makes it a popular grade for marine, architectural and industrial applications. 90/10 alloy offers designers and specifiers excellent resistance to stress corrosion, erosion, and biofouling in seawater and brackish water, excellent fabrication and welding properties, a high resistance to hydrogen embrittlement and the retention of mechanical properties down to cryogenic temperatures.
Cupro Nickel 90/10 Chemical Composition, %:
Cu |
Ni |
Fe |
Mn |
Balance |
10 |
1.5 |
0.7 |
Cupro Nickel 90/10 ASTM Specification:
Specification Minima
Pipe Smls |
Pipe |
Sheet / Plate |
Bar |
B466 |
B467 |
B122 |
B151, B122 |
Mechanical Properties of Cupro Nickel 90/10:
Ultimate Tensile Strength |
280 N/mm2 |
Yield |
(0.2 % offset) 105 N/mm2 |
Elongation |
27 % |
