C70600 Copper Nickel 90/10, also known as Cupronickel 90/10, is a copper alloy with approximately 90% copper and 10% nickel, along with trace amounts of other elements. Ameritube’s 100% Made in USA, vertically integrated copper tube manufacturing in Hillsboro, TX supports its copper alloy product line. Copper is approximately 88.6–90.4%; nickel 9–11%; iron maximum 1.8%; and manganese maximum 1%. Tensile strength typically ranges from 310 MPa (45,000 psi) to 480 MPa (70,000 psi), yield strength is generally around 105–240 MPa (15,000–35,000 psi), and elongation is typically 25–35%.
Material behavior
Corrosion resistance
C70600 Copper Nickel 90/10 exhibits excellent resistance to corrosion in various environments, especially seawater and brackish water. It is highly resistant to biofouling, erosion, and stress corrosion cracking, making it suitable for marine and offshore applications. Copper-nickel’s electrode potential is adjusted to be neutral with regard to seawater.
- Reliable in seawater cooling systems and high-water-velocity service
- Good machinability, with appropriate techniques and tools for work hardening
Heat transfer
Dependable at sea
The alloy is known for high heat transfer, ductility, and corrosion resistance. Condenser tubes of this alloy provide long and dependable service at sea. It is also highly satisfactory for evaporators, inter-after condensers, air ejectors of steam condensers, and boiler feedwater heaters.
- Protective corrosion-product films support high water velocities
- Suitable for piping, heat exchangers, condensers, and marine hardware
Manufacturing
From melt to finish
Ameritube’s 100% Made in USA, vertically integrated copper tube manufacturing happens in Hillsboro, TX. The in-house sequence includes melting copper, casting, pilgering, drawing, annealing, straightening, and testing for quality C70600 Copper Nickel tube and pipe.
- Casting and melt development
- Pilgering, drawing, annealing, straightening, and testing
Standards
Specified and tested
Ameritube has been providing C70600 Copper Nickel 90/10 according to the standards below. Request the data sheet and include the required class, size, temper, testing, and documentation in your quote package.
- ASME SB-111
- ASME SB-466
- ASTM B-111
- ASTM B-466
- MIL-T-15005F
- MIL-T-16420K Class 200, 700, 1650, 3300, and 6000
Applications
Where C70600 works
C70600 is used wherever corrosion resistance, thermal conductivity, and reliable fabrication are essential. Its common uses span marine, energy, chemical, HVAC, and industrial equipment.
- Marine and offshore: seawater cooling, heat exchangers, condensers, piping, fittings, shipbuilding
- Desalination: heat exchangers, tubing, and piping
- Offshore oil and gas: subsea systems, platforms, and pipelines
- Power, chemical processing, HVAC, automotive cooling, coinage, condenser plates, and power-plant water boxes
