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.
| Copper or Copper Alloy UNS NO. | Description |
| C70600 | 90-10 Copper-Nickel |
| C71500 | 70-30 Copper-Nickel |
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 |
Our spot inventory
| ASME SB111 C71500 | C71500 seamless condenser tube | C71500 welded copper nickel pipe |
| ASTM B111 C71500 | ASTM B466 C71500 pipe | C71500 cupronickel boiler tube |
| 70/30 copper nickel pipe | C71500 heat exchanger tube | C71500 welded copper nickel pipe |
| SB111 UNS C71500 | 70/30 cupronickel condenser tube | ASTM B111 C71500 heat exchanger tube |
C71500 copper nickel pipe | ASTM B111 C71500 heat exchanger tube | ASME SB111 C71500 copper nickel pipe |
About us
Gnee is a premier manufacturer and international supplier of comprehensive copper and copper alloy products, committed to delivering excellence in copper tubes, copper sheets, copper plates, copper bars, copper rods, copper wires, and copper strips.
Our Extensive Product Portfolio & Specifications:
Copper Tubes & Pipes:
We supply a full range including **Capillary Tubes, Thin-Walled Copper Tubes, Thick-Walled Copper Tubes, Round Pipes, Square Pipes, Rectangular Pipes, Welded Pipes, Seamless Pipes, Heat Exchanger Tubes, and Condenser Tubes.
Copper Sheets, Plates:
Our flat-rolled products cover Copper Foils, Thin Sheets, Thick Plates, and Circles (Round Plates) in various tempers (O, H) for diverse applications.
Copper Bars, Rods & Profiles:
We offer Round Bars, Square Bars, Hexagonal Bars, and Flat Bars with excellent machinability and strength.
Copper Wires & Strips:
Our lineup includes high-conductivity Bare Copper Wires, Stranded Wires, and precisely manufactured Copper Strips.
Common Alloys & International Standards:
We master a wide array of materials compliant with ASTM, EN, JIS, and GB standards:
Pure Copper: C11000 (ETP Copper), C10200 (Oxygen-Free Copper), C12000 (DLP)
Brass Alloys: C26000 (Cartridge Brass), C27200 (Brass), C28000 (Muntz Metal)
Copper-Nickel: C70600 (CuNi90/10), C71500 (CuNi70/30)
Phosphor Bronze: C51900, C52100, C54400
Serving industries from HVAC/R and plumbing to electrical, automotive, and marine engineering, Gnee provides OEM support, competitive pricing, and reliable bulk supply for your global projects.
