We Super Steel Manufacturing Co.,Ltd(SMC) are amongst the top manufacturers and suppliers for the seamless steel pipe, welded steel pipe, OCTG products and fittings from China. We have been manufacturing and supplying these products to the industry since 1993, and received repeat orders and appreciation from our valued customers.
High quality piping products from approved manufacturers.
In order to continuously improve our offerings to our clients, we have consistently improved and upgraded our manufacturing facility and can hence offer material with stringent requirements.
Over the years, Super Steel Manufacturing Co.,Ltd(SMC) has developed an enviable reputation for project management for the Oil & Gas, Construction, Power Energy, Marine & Offshore, Water Treatment, Exploration & Drilling Services, Pipeline & Petrochemical and other heavy industries.
The many years of experience that we have means that there is always someone who has the ability to carry a project forward.
Always up to date. In this column you can find the steel pipe related articles, including industry trends, product standards and materials, and some technical guidelines.
Copper stands out among metals for its exceptional versatility in alloying. It can be combined with a wide range of alloying elements, resulting in over 400 recognized copper alloys—each with unique mechanical, thermal, and corrosion-resistant properties tailored for diverse applications. Notably, copper offers outstanding electrical and thermal conductivity, making it a preferred base material in both industrial and marine-grade alloys.
Among these, UNS C70400 is a high-performance copper-nickel alloy pipe known for its durability and corrosion resistance, especially in saltwater and harsh environments. The following datasheet will provide details about UNS C70400 copper alloy pipe.
Super Steel Manufacturing Co.,Ltd is professional copper nickel pipes manufacturer, for more details, please contact:sales@super-steels.com
Key Applications of C70400 Copper-Nickel Pipe
UNS C70400 copper-nickel pipes are widely used across various industries due to their excellent resistance to biofouling, erosion, and seawater corrosion. Common applications include:
Marine Systems – Ideal for seawater piping in ships and submarines
Heat Exchangers & Condensers – Efficient thermal conductivity ensures reliability
Offshore Oil & Gas – Used in topside and subsea systems
Power Plants – Applied in cooling systems and heat transfer units
Shipbuilding – Structural and functional roles in piping and hull fittings
Desalination Facilities – Corrosion resistance ensures long service life
Seawater System Design – Used in intake, discharge, and circulation systems
Seawater System Components – Valves, pumps, and heat transfer units
Boat & Ship Hulls – Resistant to corrosion and marine growth
Antimicrobial Surfaces – Used in public spaces and healthcare applications
Oil Coolers – Reliable under high thermal loads
Hydraulic Tubing – Maintains strength under pressure and temperature fluctuations
Mechanical Properties of C70400 Copper Nickel Pipe
|
Properties |
Metric |
Imperial |
|
Tensile strength |
262-531 MPa |
38000-77000 psi |
|
Yield strength (depending on temper) |
276-524 MPa |
40000-76000 psi |
|
Elongation at break (in 50.8 mm) |
46% |
46% |
|
Elastic modulus |
117 GPa |
17000 ksi |
|
Poisson’s ratio |
0.34 |
0.34 |
|
Machinability (UNS C36000 (free-cutting brass) = 100) |
20 |
20 |
|
Shear modulus |
44.0 GPa |
6380 ksi |
Chemical Composition of C70400 Copper Nickel Pipe
|
Element |
Content (%) |
|
Cu |
92.4 |
|
Fe |
1.5 |
|
Ni |
5.5 |
|
Mn |
0.6 |
Physical Properties of C70400 Copper Nickel Pipe
|
Properties |
Metric |
Imperial |
|
Density |
8.94 g/cm3 |
0.323 lb/in³ |
Thermal Properties of C70400 Copper Nickel Pipe
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@20-300°C/68-572°F) |
17.5 µm/m°C |
9.72 µin/in°F |
|
Thermal conductivity (@20°C/ 68°F ) |
64.0 W/mK |
444 BTU in/hr.ft².°F |
Fabrication and Heat Treatment of C70400 Copper Nickel Pipe
|
Machinability |
20 |
|
Welding |
Soldering, brazing, oxyacetylene welding, gas shielded arc welding, coated metal arc welding, spot welding, seam welding, and butt welding are considered as suitable welding processes |
|
Hot Working |
843 - 954°C (1550 - 1750°F). |
|
Cold Working |
Excellent |
|
Annealing |
593 - 816°C (1100 -1500°F) |
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