Copper Nickel Alloy Difference C70600 vs C71500
What is material grade C70600?
C70600 is a 90/10 copper-nickel alloy (90% copper, 10% nickel) with good corrosion resistance in seawater, commonly used in marine piping and heat exchangers.
What is C71500 material?
C71500 is a 70/30 copper-nickel alloy (70% copper, 30% nickel) with higher strength and superior corrosion resistance, ideal for naval systems and high-pressure marine applications.
Chemical Composition of C70600 vs C71500
Element | C70600 | C71500 |
Copper (Cu) | 88.6 – 90% | 69 – 77% |
Nickel (Ni) | 9 – 11% | 29 – 33% |
Iron (Fe) | 1.0% | 0.4 – 1.0% |
Manganese | 1.0% | 0.5 – 1.0% |
Mechanical & Physical Properties C70600 vs C71500
Property | C70600 | C71500 |
Tensile Strength | 275–414 MPa | 310–517 MPa |
Yield Strength | 90–135 MPa | 105–241 MPa |
Elongation | 30% | 30% |
Corrosion Resistance | Excellent | Superior |
Resistance to Erosion | Good | Better |
Weldability | Excellent | Good |
Cost | Lower | Higher |
Marine Performance of C70600 vs C71500
Environment | C70600 | C71500 |
Seawater Corrosion | Excellent | Excellent (even better in velocity) |
Biofouling Resistance | Very good | Very good |
High-Velocity Water | Up to 2.5 m/s | Up to 4 m/s |
Applications of C70600 vs C71500
C70600 (90/10) | C71500 (70/30) |
Seawater pipes & fittings | High-performance marine piping |
Desalination systems | Power plant condensers |
HVAC and heat exchangers | Oil & gas platform piping |
Marine condenser & cooler tubes | Chemical process industry heat exchangers |
Water-cooled brakes, radiators | High-velocity seawater environments |
How to choose C70600 vs C71500
Need | Best Choice |
Cost-effective, general marine use | C70600 |
High strength, high flow seawater | C71500 |
Erosion/corrosion critical system | C71500 |
Easy welding & fabrication | C70600 |