ASTM B111 C70620 Tube – UNS C70620 (90/10 Copper Nickel Tube)
ASTM B111 C70620 Tube, identified by UNS C70620, is a high-performance copper-nickel 90/10 alloy tube widely used in marine and industrial heat transfer applications. Compared to standard C70600, ASTM B111 UNS C70620 tubes contain controlled additions of iron and manganese to further enhance resistance to seawater corrosion, erosion, and biofouling. These tubes are manufactured seamlessly and supplied in annealed condition, making them suitable for condensers, heat exchangers, and seawater piping systems where long-term reliability is essential.
Key Features
- Superior resistance to seawater, brackish water, and marine atmospheres
- Enhanced erosion-corrosion resistance due to iron and manganese additions
- Good thermal conductivity for efficient heat transfer
- Excellent ductility and formability
- High resistance to biofouling and stress corrosion cracking
- Long service life with minimal maintenance
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | C70620 |
| EN | CuNi10Fe1Mn |
| DIN | 2.0872 |
| ISO | CuNi10Fe1Mn |
Sizes
- Outside Diameter: 6 mm to 114.3 mm
- Wall Thickness: 0.8 mm to 6 mm
- Length: Standard up to 6 meters, custom cut lengths available
- Form: Straight lengths and U-bend tubes
ASTM B111 C70620 Chemical Composition
| Element | Percentage (%) |
|---|---|
| Copper (Cu) | Balance |
| Nickel (Ni) | 9.0 – 11.0 |
| Iron (Fe) | 1.3 – 1.8 |
| Manganese (Mn) | 0.5 – 1.0 |
| Zinc (Zn) | Max 0.5 |
| Lead (Pb) | Max 0.02 |
C70620 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 360 MPa |
| Yield Strength | ≥ 125 MPa |
| Elongation | ≥ 30% |
| Hardness | ≤ 85 HRB |
UNS C70620 Physical Properties
| Property | Value |
|---|---|
| Density | 8.94 g/cm³ |
| Melting Point | ~1100°C |
| Thermal Conductivity | ~50 W/m·K |
| Electrical Conductivity | ~4% IACS |
Type of ASTM B111 C70620 Tubes
- C70620 Seamless Tubes
- C70620 U-Bend Tubes
- Condenser Tubes
- Heat Exchanger Tubes
Applications
- Marine Condensers
- Heat Exchangers
- Shipbuilding
- Offshore Platforms
- Desalination Plants
- Power Generation
- Oil and Gas cooling systems
- Seawater Piping Networks
Reviews
There are no reviews yet.