C70600 – CuNi 90/10 – CuNi10Fe1Mn
C70600 copper-nickel tubes, composed of approximately 90% copper and 10% nickel with small additions of iron and manganese, are engineered for excellent corrosion resistance and anti-biofouling performance in marine and industrial environments. The alloy provides strong resistance to impingement attack, seawater erosion, and stress corrosion cracking, making it highly suitable for high-velocity cooling systems.
Thanks to their durability and natural resistance to marine growth, CuNi 90/10 tubes are widely used in marine condensers, heat exchangers, and desalination plants, where reliable long-term performance is required under demanding thermal and chemical conditions.
Applications
C70600 copper-nickel tubes are commonly used in:
- Marine and offshore heat exchangers, condensers, and cooling systems
- Desalination plants and seawater treatment equipment
- Chemical and industrial piping handling aggressive media
- Power generation and shipboard thermal systems
- Ballast water systems and hull coolers
- Offshore oil & gas platforms and coastal refinery cooling systems
Key Benefits
- Excellent seawater corrosion resistance – performs reliably in marine environments with minimal maintenance
- Outstanding resistance to biofouling – naturally inhibits marine organism growth
- Superior impingement and erosion resistance – suitable for high-velocity seawater service
- High resistance to stress corrosion cracking – ensures structural integrity in aggressive conditions
- Good thermal conductivity – supports efficient heat transfer performance
- Long service life – reduces maintenance and lifecycle costs
- Standards compliance – manufactured according to ASTM B111, B395, B466, and B552
Technical Specifications
UNS No.
C70600 – BSI No. CN102 – ISO Name CuNi10Fe1Mn
Chemical Composition (%)
Cu: Rem.
Ni: 9.0 – 11.0
Fe: 1.0 – 1.8
Pb: ≤ 0.05
Zn: ≤ 1.0
Mn: ≤ 1.0
ASTM Specification
B111, B395, B466, B552
ASME Specification
SB111, SB395, SB466
Typical Applications
Heat exchangers, condensers, cooling systems, desalination equipment, and chemical piping
Temper
O61 (Annealed) / H55 (Light Drawn)
Properties and Metrics
| Property | Metric | English |
|---|---|---|
| Density | 8.94 g/cm³ | 0.301 lb/in³ |
| Tensile Strength | 345 MPa | 50 ksi |
| Yield Strength | 125 MPa | 18 ksi |
| CTE, Linear | 17.7 × 10⁻⁶/°C @ 20–300°C | 9.5 × 10⁻⁶/°F @ 70–570°F |
| Specific Heat Capacity | 0.09 cal/g-°C @ 20°C | 0.09 BTU/lb-°F @ 70°F |
| Thermal Conductivity | 45 W/m·K @ 20°C | 26 BTU/ft²/ft/h/°F @ 70°F |
| Melting Point | 1099 – 1149°C | 2010 – 2100°F |
* The values shown are typical reference data only and should not be used for design or engineering purposes.
