C70600 CuNi 70/30 Pipe Marine Seawater System ASME SB111 Seamless Tube
C70600 CuNi 70/30 Pipe Marine Seawater System ASME SB111 Seamless Tube
1.Product Description
Copper-nickel pipe is a high-performance alloy tube primarily composed of copper with a significant proportion of nickel (typically 10% or 30%). It may also include iron and manganese to enhance strength and corrosion resistance. Known for excellent resistance to seawater and biofouling, this pipe is manufactured via seamless or welded processes to ASTM, ASME, or DIN standards.
2.Product Functions
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Marine engineering: Seawater cooling lines, firewater systems, and ballast lines on ships, offshore platforms, and desalination plants.
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Power generation: Heat exchangers, condensers, and turbine oil coolers.
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Industrial: Hydraulic lines, brake lines, and compressed air systems.
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Anti-fouling systems: Sheathing for boat hulls and offshore structures to prevent marine growth.
3.Product Functions
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Fluid transport: Safely conveys seawater, oil, gas, and non-oxidizing acids.
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Heat transfer: Efficiently cools or heats media in tubular heat exchangers.
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Structural support: Provides mechanical strength in pipe systems without heavy wall thickness.
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Microbial suppression – Releases copper ions that reduce biofilm formation inside pipes.
4.Key Product Parameters
| Parameter | CuNi 90/10 (C70600) | CuNi 70/30 (C71500) |
| Chemical Composition (Nominal) | Cu bal., Ni 10%, Fe 1.4%, Mn 0.8% | Cu bal., Ni 30%, Fe 0.7%, Mn 0.8% |
| Outside Diameter Range | 1/8″ – 24″ (3.18 mm – 610 mm) | 1/8″ – 24″ (3.18 mm – 610 mm) |
| Wall Thickness (Schedule) | Schedule 5, 10, 40, 80, 120, 160 | Schedule 5, 10, 40, 80, 120, 160 |
| Length Options | 6 m (20 ft) random, 3 m (10 ft) fixed, or custom | 6 m (20 ft) random, 3 m (10 ft) fixed, or custom |
| Minimum Tensile Strength | 310 MPa (45,000 psi) | 480 MPa (70,000 psi) |
| Minimum Yield Strength (0.2% offset) | 110 MPa (16,000 psi) | 170 MPa (25,000 psi) |
| Minimum Elongation (2″ gauge) | 30% | 30% |
| Hardness (Rockwell B) | 60 – 80 HRB | 75 – 90 HRB |
| Modulus of Elasticity | 140 GPa (20,300 ksi) | 150 GPa (21,800 ksi) |
| Coefficient of Thermal Expansion | 17.0 × 10⁻⁶ /°C (20-300°C) | 16.2 × 10⁻⁶ /°C (20-300°C) |
| Thermal Conductivity (at 20°C) | 45 W/(m·K) | 29 W/(m·K) |
| Electrical Conductivity (% IACS) | 9% | 5% |
| Density | 8.94 g/cm³ (0.323 lb/in³) | 8.94 g/cm³ (0.323 lb/in³) |
| Melting Point Range | 1100 – 1145°C (2010 – 2095°F) | 1170 – 1240°C (2140 – 2265°F) |
| Maximum Continuous Service Temp | 315°C (600°F) (in air) / 650°C (1200°F) (in non-oxidizing) | 315°C (600°F) (in air) / 650°C (1200°F) (in non-oxidizing) |
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