ASTM B111 C70600 Copper Nickel Tube | CuNi 90/10 Seamless Tube
ASTM B111 C70600 copper nickel tubes (CuNi 90/10) are seamless tubes designed for seawater heat transfer applications. With excellent resistance to corrosion, biofouling, and erosion, they are widely used in condensers, heat exchangers, desalination plants, and marine cooling systems.
What is ASTM B111 C70600 Copper Nickel Tube?
ASTM B111 specifies seamless copper and copper alloy tubes used in:
- Condensers
- Heat exchangers
- Evaporators
C70600 (CuNi 90/10) Composition:
- ~90% Copper
- 9–11% Nickel
- Iron + Manganese additions
Also known as:
- CuNi10Fe1Mn
- UNS C70600
- CW352H
Why CuNi 90/10 is Ideal for Seawater
C70600 copper nickel tubes offer excellent resistance to:
- Seawater corrosion
- Stress corrosion cracking (SCC)
- Erosion and impingement
- Biofouling
Due to formation of a protective oxide film on the surface
ASTM B111 Standard Overview
ASTM B 111 covers seamless tubes manufactured by:
- Extrusion
- Cold drawing
- Annealing
Available Tempers:
- Annealed
- Light drawn
- Hard drawn
- End annealed
Testing Requirements
All ASTM B111 tubes undergo strict testing:
- Eddy current testing (100%)
- Hydrostatic or pneumatic testing
- Expansion test
- Flattening test
- Residual stress test
- Ammonia vapor test
Ensures quality for critical heat transfer applications
Chemical Composition (C70600)
| Element | Content (%) |
|---|---|
| Ni | 9.0 – 11.0 |
| Fe | ≤ 1.8 |
| Mn | ≤ 1.0 |
| Zn | ≤ 1.0 |
| Cu | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 38 ksi |
| Yield Strength | ≥ 15 ksi |
| Elongation | ≥ 30% |
Size Range
- Outer Diameter: 4 mm – 419 mm
- Length: Up to 12 meters
- Custom sizes available
Surface & Quality
- Bright, clean surface
- Smooth internal and external finish
- Burr-free ends
- Tight dimensional tolerance
Equivalent Standards
| Country | Grade |
|---|---|
| USA | C70600 |
| Germany | CuNi10Fe1Mn |
| UK | CN102 |
| Japan | C7060 |
| China | BFe10-1-1 |
Applications
Power Plants
- Surface condensers
- Turbine cooling systems
Marine & Offshore
- Ship condensers
- Seawater cooling systems
Desalination Plants
- Evaporators
- Brine heaters
Petrochemical Industry
- Heat exchangers
- Cooling systems
Seawater System Matching
A typical CuNi 90/10 system includes:
- Tube: ASTM B111 C70600
- Pipe: ASTM B466 CuNi
- Flange: ASTM B151 C70600
- Fitting: CuNi elbows
Ensures:
✔ Corrosion resistance consistency
✔ Long service life
✔ Reduced maintenance
CuNi 90/10 vs 70/30
| Property | 90/10 | 70/30 |
|---|---|---|
| Strength | Moderate | Higher |
| Seawater resistance | Excellent | Superior |
| High velocity | Good | Better |
| Cost | Lower | Higher |
👉 90/10 is ideal for general seawater systems
Advantages of C70600 Tubes
✔ Excellent seawater corrosion resistance
✔ High resistance to biofouling
✔ Long service life
✔ Low maintenance cost
✔ Good weldability
Quick Summary of C70600 tube
- Material: ASTM B111 C70600
- Type: Seamless CuNi tube
- Feature: Seawater corrosion resistance
- Application: Heat exchangers & marine systems
FAQ
What is C70600 tube used for?
Seawater heat exchangers and condensers.
What is CuNi 90/10?
A copper-nickel alloy with 90% Cu and 10% Ni.
Why is CuNi used in marine systems?
Because of its corrosion and biofouling resistance.
What is the difference between C70600 and C71500?
C71500 has higher strength and better erosion resistance.
Related Products
👉 Copper Nickel Flanges (C70600)
👉 ASTM B466 C70600 CuNi Pipes
👉 Heat Exchanger Tubes
👉 CuNi 70/30 Tubes
Copper Nickel Tube Manufacturer and Supplier
We are a professional manufacturer and global supplier of ASTM B111 C70600 copper nickel seamless tubes for marine and industrial applications.
Our services include:
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Custom tube sizes
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Fast production
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Competitive pricing
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Export packaging
All tubes can be supplied with EN 10204 3.1 Mill Test Certificate (MTC) and packed in seaworthy wooden cases for international shipping.
