UNS C70600 copper nickel alloy heat exchangers tubes

C70600 Copper Tube PDF

C70600 Copper Nickel Size PDF

UNS C70600 copper-nickel alloy tubes, with their superior mechanical and corrosion resistance, have been widely used in various fields such as shipbuilding, chemical engineering, energy engineering, and marine engineering. They are commonly used in the manufacture of piping systems, condensers, evaporators, heat exchangers, and various high-strength, corrosion-resistant components.

C70600 nickel-copper alloy exhibits excellent corrosion resistance in a variety of corrosive media. This is mainly due to the optimized ratio of nickel and copper in its alloy composition, as well as the possible addition of other trace elements, such as manganese and iron. These elements work together to form a dense protective film, effectively preventing the penetration of corrosive media. Whether in high-temperature, high-humidity, salt spray, or strong acid and alkali environments, C70600 nickel-copper alloy maintains a long service life, reducing the frequency of maintenance and replacement, and lowering costs.

C70600 pipes are available in two types.

These are:

· Seamless C70600 Pipes

The production of seamless C70600 pipes requires the use of methods such as extrusion, forging, mandrel mill or rolling mills.

The manufacturing methods create seamless C70600 pipes that are smooth with no joints.

As a result, these pipes offer better leakproof characteristics compared to welded C70600 pipes.

These pipes have uniform design and strength along their cross-section, which facilitate fluid flow.

These pipes are durable due to the absence of joints compared to C70600 pipes.

Seamless C70600 pipes are pricey than welded C70600 pipes.

However, they have a low maintenance cost.

The operating pressure and temperature of systems that use these pipes are relatively high.

· Welded C70600 Pipes

Welded C70600 pipes feature joints along its surface.

This makes the surface to have uneven strength and design.

Fabrication processes of C70600 pipes involve circular section forging.

This is through methods like continuous rolling, plate rolling or point pressing.

Welding of the circular section follows.

Welding can be through a high-frequency method, submerging arc welding method or electric resistance method.

Applications whose fluid flows is at low pressure and have low temperature make use of these pipes due to their uneven strength and structure.

Though they are cheap compared to seamless C70600 pipes, they have a high maintenance cost.

The chemical compounds have varying quantities in C70600 pipes and CuNi 70/30 pipes.

In C70600 copper is the primary compound at 90% while Nickel is 10%.

30% Nickel and 70% copper constitute CuNi 70/30.

Besides, they have other elements such as manganese and iron with CuNi 70/30 pipes having more of these two elements.

C70600 pipes are cheaper than CuNi 70/30 pipes though their resistivity to thermal and electrical conduction is lower than that of CuNi 70/30 pipes.

Due to the large amounts of manganese and iron content, CuNi 70/30 pipes are stronger than C70600 pipes.

High salty applications make use of CuNi 70/30 pipes while applications such as desalination plants, marine plants and power plants use C70600 pipes.

What are the common product forms available?
It is widely available as seamless tube and pipe (ASTM B466), sheet and plate (ASTM B171), bar (ASTM B151), and welded tube.

What is the typical lifespan of a C70600 seawater system?
With proper design, installation, and maintenance, C70600 systems can have a service life exceeding 40 years.

How does it handle polluted seawater?
It performs well, but performance can be degraded in waters with high levels of sulfide pollution, which can disrupt the formation of the protective oxide film.

What is the primary advantage of using C70600?
Its key advantage is outstanding resistance to seawater corrosion, including impingement attack, and inherent biofouling resistance, which reduces marine growth on surfaces.

How does C70600 compare to C71500 (70-30 CuNi)?
C70600 is more cost-effective with good all-around corrosion resistance. C71500 offers superior strength and better resistance to higher velocity seawater and erosion-corrosion, but at a higher cost.

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.