ASTM B466 C70600 Copper-Nickel Seamless Pipes for Seawater Cooling Systems

We supply C70600 copper-nickel seamless pipes conforming to ASTM B466 /
B466M, also known as 90/10 copper-nickel alloy seamless tubes. Based on copper
with approximately 10% nickel and small additions of iron and manganese, this
alloy offers excellent seawater corrosion resistance, resistance to flowing
seawater erosion, good weldability, and excellent formability.
It is one of the most commonly used materials for seawater cooling systems,
condensers, heat exchangers, and marine piping systems.
Compared with ordinary copper tubes, carbon steel pipes, and stainless steel
pipes, C70600 copper-nickel alloy provides excellent overall service
performance in flowing seawater, mildly polluted seawater, oxygenated seawater,
and certain marine environments. In seawater service, the material surface
gradually forms a stable protective film, effectively reducing the risk of
uniform corrosion and improving long-term operational reliability.

Advantages of Marine C70600 Copper-Nickel Pipes
1. Excellent Seawater Corrosion Resistance
C70600 copper-nickel seamless pipes are suitable for natural seawater,
circulating seawater, brackish water, and certain industrial cooling-water
environments. They provide good resistance to uniform seawater corrosion,
crevice corrosion, and marine atmospheric corrosion, making them particularly
suitable for piping and heat-exchange systems exposed to seawater over long
periods.
2. Good Resistance to Erosion and Flowing Seawater
In seawater cooling systems, areas near elbows, valves, pump outlets, and
locations with changing flow velocities can be susceptible to erosion. C70600
copper-nickel alloy offers good resistance to flowing seawater erosion and is
suitable for piping sections subject to demanding flow velocity, sand content,
and operating conditions.
3. Good Resistance to Marine Biofouling
Copper-nickel alloys provide a certain degree of resistance to marine
biofouling in seawater environments. This helps reduce the adhesion of
microorganisms, shellfish, and algae to tube walls, thereby lowering the risks
of pipe blockage, reduced heat-transfer efficiency, and increased maintenance
frequency.
4. Excellent Weldability and Fabrication Properties
C70600 copper-nickel seamless pipes feature good cold-working, bending,
flaring, reducing, and welding properties. They can meet the requirements of
on-site marine piping installation, prefabrication, flange connections, welded
assembly, and matching with complex fittings.
5. Long Service Life and Lower Maintenance Costs
For seawater systems, the initial material purchase cost is not the only
consideration. Selecting suitable copper-nickel alloy piping can help reduce
total operating costs associated with corrosion perforation, leakage-related
shutdowns, frequent replacements, and maintenance.
Main Marine Applications
Seawater cooling circuits: Engine cooling, central coolers, and auxiliary heat
exchangers.
Marine and offshore piping: Bilge and ballast water lines, firefighting
systems, and deck piping.
Seawater desalination plants: Brine heaters, evaporators, and intake
manifolds.
Shipbuilding: Naval vessels, commercial cargo ships, luxury yachts, and FPSO
units.

Minimum Order: 1 tons

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