70/30 C71500 Copper-Nickel Alloy marine engineering pipe

C71500 Copper Nickel Tubes PDF

C71500 Copper Nickel Size & Price PDF

C71500 copper-nickel alloy (international designation UNS C71500, Chinese designation BFe30-1-1) is a high-performance material with copper (Cu) as the base and nickel (Ni) as the main alloying element. The nickel content is consistently between 29% and 33%, hence it is often referred to as "70/30 copper-nickel alloy." By adding trace elements such as iron (Fe) and manganese (Mn), its corrosion resistance and mechanical strength are optimized, making it a core material in marine engineering, chemical equipment, and energy fields.

During ship navigation, piping systems are subjected to various dynamic and static loads, including wave impacts, hull vibrations, and equipment operation. This necessitates piping materials with excellent mechanical properties. C71500 copper pipes possess high strength and excellent toughness; their tensile strength and yield strength are sufficient to withstand the stresses of ship piping systems under complex operating conditions, making them less prone to breakage and deformation. Meanwhile, the excellent toughness of C71500 copper pipes allows them to maintain good plasticity even at low temperatures, preventing them from becoming brittle and prone to cracking. For ships navigating in cold waters such as polar regions, pipelines made of C71500 copper pipes can reliably transport media such as seawater, fuel oil, and fresh water, ensuring the normal operation of all ship systems. Furthermore, C71500 copper pipes possess excellent fatigue properties, resisting fatigue cracks even under long-term exposure to ship vibrations and the periodic impacts of waves, thus improving the safety and reliability of the ship's piping system and ensuring stable navigation in various sea conditions.

Q: Why is C71500 so resistant to seawater corrosion?

A: It forms a tight, adherent, and protective surface oxide film that is highly resistant to various forms of corrosion, including impingement attack, crevice corrosion, and stress corrosion cracking in marine environments.

Q: Is C71500 resistant to biofouling?

A: While not completely anti-fouling, the corrosion product film on C71500 is less conducive to marine organism attachment than many other metals, and the release of copper ions into the water provides a mild biofouling resistance.

Q: How does C71500 resist erosion-corrosion?

A: Its high inherent strength and the durability of its protective film allow it to withstand high flow velocities (typically up to 3.5-4 m/s in seawater) without significant damage.

Q: What is the thermal conductivity of C71500?

A: It is relatively low, approximately 29 W/m·K (about 17% of pure copper). This is a key feature for heat exchanger applications where heat retention is desired.

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.

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.

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Our lineup includes high-conductivity Bare Copper Wires, Stranded Wires, and precisely manufactured Copper Strips.

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

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