ASTM B111 C71500 Tube – UNS C71500 (70/30 Copper Nickel Tube)
ASTM B111 C71500 Tube, designated as UNS C71500, is a premium copper-nickel 70/30 alloy tube developed for severe marine and industrial environments. With approximately 70% copper and 30% nickel, ASTM B111 UNS C71500 tubes provide significantly higher strength and superior resistance to seawater corrosion compared to 90/10 copper-nickel alloys. The addition of controlled iron and manganese further improves resistance to erosion, cavitation, and biofouling. Due to these properties, ASTM B111 C71500 tubes are extensively used in condensers, heat exchangers, offshore platforms, and power generation systems where reliability and long service life are critical.
Key Features
- Exceptional resistance to seawater, polluted water, and marine atmospheres
- Higher mechanical strength than CuNi 90/10 alloys
- Excellent resistance to erosion-corrosion and cavitation
- Good thermal conductivity and heat transfer efficiency
- High resistance to biofouling and stress corrosion cracking
- Excellent weldability, formability, and long operational life
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | C71500 |
| EN | CuNi30Mn1Fe |
| DIN | 2.0882 |
| ISO | CuNi30Mn1Fe |
Sizes
- Outside Diameter: 6 mm to 114.3 mm
- Wall Thickness: 0.9 mm to 7 mm
- Length: Up to 6 meters, cut lengths available
- Form: Straight tubes and U-bend tubes
ASTM B111 C71500 Chemical Composition
| Element | Percentage (%) |
|---|---|
| Copper (Cu) | Balance |
| Nickel (Ni) | 29.0 – 33.0 |
| Iron (Fe) | 0.4 – 1.0 |
| Manganese (Mn) | 0.5 – 1.0 |
| Zinc (Zn) | Max 0.5 |
| Lead (Pb) | Max 0.02 |
UNS C71500 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 380 MPa |
| Yield Strength | ≥ 140 MPa |
| Elongation | ≥ 30% |
| Hardness | ≤ 100 HRB |
UNS C71500 Physical Properties
| Property | Value |
|---|---|
| Density | 8.95 g/cm³ |
| Melting Point | ~1170°C |
| Thermal Conductivity | ~29 W/m·K |
| Electrical Conductivity | ~3% IACS |
Type of C71500 Tubes
- C71500 Seamless Tubes
- C71500 U-Bend Tubes
- Condenser Tubes
- Heat Exchanger Tubes
Applications
- Marine Condensers
- Offshore oil and gas platforms
- Heat Exchangers
- Power Plants
- Desalination Units
- Shipbuilding
- Seawater Cooling Systems
Reviews
There are no reviews yet.