ASME SB111 C71500 CuNi70/30 Copper Nickel Tube Seamless Tube For Heat Exchanger
ASME SB111 C71500, CuNi70/30 Copper Nickel Tube Seamless Tube For Heat Exchanger
Introduction
ASME SB111 C71500, also known as Copper Nickel 70/30, is a high-performance copper alloy tube with 70% copper and 30% nickel. It is renowned for excellent resistance to seawater corrosion, high thermal conductivity, and mechanical strength, making it ideal for marine and power industry heat exchangers and condensers.
Chemical Composition (per ASME SB111)
| Element | Content (%) |
|---|---|
| Copper (Cu) | 69.0 – 77.0 |
| Nickel (incl. Cobalt) | 29.0 – 33.0 |
| Iron (Fe) | 0.4 – 1.0 |
| Manganese (Mn) | ≤ 1.0 |
| Zinc (Zn) | ≤ 1.0 |
| Lead (Pb) | ≤ 0.05 |
| Others (each) | ≤ 0.05 |
| Others (total) | ≤ 0.15 |
Mechanical Properties (Annealed Condition)
| Property | Value |
|---|---|
| Tensile Strength | ≥ 303 MPa (44,000 psi) |
| Yield Strength (0.5% ext.) | ≥ 103 MPa (15,000 psi) |
| Elongation (2") | ≥ 30% |
| Hardness (HRB) | Typically ≤ 80 |
Key Advantages
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Outstanding seawater corrosion resistance (even in turbulent flow)
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Good resistance to stress corrosion cracking and pitting
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Excellent weldability and formability
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High thermal and electrical conductivity
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Reliable performance under high temperature and pressure
Applications
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Heat exchangers and condensers in power plants and chemical industries
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Seawater cooling systems
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Shipbuilding and marine piping
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Desalination equipment
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Offshore platforms and oil rigs
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