ASTM B111 C71640 Tube – UNS C71640 (Copper Nickel Alloy Tube)
ASTM B111 C71640 Tube, identified as UNS C71640, is a copper-nickel alloy tube engineered for condenser, heat exchanger, and marine-related applications. Manufactured in seamless form as per ASTM B111, UNS C71640 tubes deliver reliable performance in environments involving fresh water, cooling water, and mildly corrosive media. The alloy composition offers a balanced combination of corrosion resistance, mechanical strength, and thermal efficiency, making ASTM B111 C71640 tubes a dependable choice for long-term industrial service.
ASTM B111 C71640 tubes are widely used where stable heat transfer, dimensional accuracy, and resistance to general corrosion are required under continuous operating conditions.
Key Features
- Good resistance to general corrosion and water-side attack
- Efficient thermal conductivity for heat transfer systems
- Seamless construction for uniform wall thickness
- Good ductility and ease of bending and fabrication
- Stable mechanical properties at operating temperatures
- Long service life with low maintenance
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | C71640 |
| EN | Copper Nickel Alloy |
| DIN | CuNi Alloy |
| ISO | Copper Nickel Alloy |
Sizes
- Outside Diameter: 6 mm to 114.3 mm
- Wall Thickness: 0.7 mm to 6 mm
- Length: Up to 6 meters, random or cut lengths available
- Form: Straight tubes and U-bend tubes
ASTM B111 C71640 Chemical Composition
| Element | Percentage (%) |
|---|---|
| Copper (Cu) | Balance |
| Nickel (Ni) | 15.0 – 18.0 |
| Iron (Fe) | Max 0.8 |
| Manganese (Mn) | Max 0.8 |
| Zinc (Zn) | Max 0.5 |
| Lead (Pb) | Max 0.02 |
C71640 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 350 MPa |
| Yield Strength | ≥ 120 MPa |
| Elongation | ≥ 30% |
| Hardness | ≤ 90 HRB |
UNS C71640 Physical Properties
| Property | Value |
|---|---|
| Density | 8.93 g/cm³ |
| Melting Point | ~1120°C |
| Thermal Conductivity | ~40 W/m·K |
| Electrical Conductivity | ~5% IACS |
Type of Grade C71640 Tubes
- C71640 Seamless Tubes
- C71640 U-Bend Tubes
- Condenser Tubes
- Heat Exchanger Tubes
Applications
- Marine condensers and shipboard heat exchangers
- Seawater cooling and circulation systems
- Power plant condensers and heat recovery units
- Offshore oil & gas platforms and process cooling systems
- Desalination plants and seawater distillation units
- Heat exchangers in chemical and petrochemical industries
- Shipbuilding and marine engineering equipment
- HVAC and industrial cooling water systems
- Hydraulic and instrumentation tubing in marine environments
- Saltwater piping and coastal industrial installations
Reviews
There are no reviews yet.