Copper Nickel C71500 70/30 Oil and Gas Industry Pipe

C71500 Copper Nickel Tubes PDF

C71500 Copper Nickel Size & Price PDF

Copper Nickel C71500 (CuNi30MnFe1) is a copper nickel alloy with limited additions of manganese and iron to increase the strength. Copper Nickel 70/30 is also insensitive to stress corrosion.

Although this alloy was already known by the Chinese in the 9th Century, it did not become popular until the 1920's when it was developed for naval applications in seawater condenser systems.

The addition of iron helps grain refining and increases the erosion resistance with flowing seawater.

It retains its strength well at moderately elevated temperatures, has good cold and hot working properties, and is easily weldable.

The alloy is now used in a wide spectrum of applications, ranging from piping for seawater, cladding for offshore platforms and underwater cages for fish farming.

Being high in copper Copper Nickel 70/30 has anti-bio-fouling properties in seawater, and more recently, has been proven to have anti-microbial applications in hospital environments to combat the spread of viral bacteria.

Petrochemical Industry

Oil and Gas Industry

Chemical Industry

Power Plant Industry

Energy Industry

Pharmaceuticals Industry

Pulp & Paper Indusry

Food Processing Industry

Aerospace Industry

Refining Industry

Q: Can C71500 handle acidic or alkaline environments?

A: It has good resistance to neutral and alkaline solutions and non-oxidizing acids. However, it is not recommended for strongly oxidizing acids like nitric acid.

Q: What is the typical tensile strength of C71500 pipe?

A: In the annealed condition, the typical tensile strength is around 380 MPa (55 ksi), which can be higher in drawn or hard temper conditions.

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.

Q: What is the coefficient of thermal expansion for C71500?

A: It is relatively low, about 16.2 x 10⁻⁶/°C (9.0 x 10⁻⁶/°F), which minimizes thermal stress.

Q: How do you weld C71500 copper-nickel pipe?

A: It is readily weldable using Gas Tungsten Arc Welding (GTAW/TIG) and Gas Metal Arc Welding (GMAW/MIG) processes. Use matching filler metals like ERCuNi or 70/30 CuNi rods and ensure proper shielding gas to prevent oxidation.

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We master a wide array of materials compliant with ASTM, EN, JIS, and GB standards:

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Copper-Nickel: C70600 (CuNi90/10), C71500 (CuNi70/30)

Phosphor Bronze: C51900, C52100, C54400

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