ASTM B111 C71500 Copper Nickel Alloy Tubes
Material and Specification
ASTM B111 C71500 is a type of copper-nickel alloy known for its excellent corrosion resistance and high strength. It is commonly used in marine environments and various industrial applications where resistance to seawater corrosion is essential.
Key Features
Superior corrosion resistance in seawater environments
High strength and durability
Excellent thermal conductivity
Good weldability and workability
Resistant to biofouling and erosion
Chemical Composition
| Element | Composition (%) |
| Copper (Cu) | 70.0-73.0 |
| Nickel (Ni) | 24.0-26.0 |
| Iron (Fe) | 1.0 max |
| Manganese (Mn) | 1.0 max |
| Lead (Pb) | 0.05 max |
| Zinc (Zn) | 1.0 max |
| Others | 0.5 max |
Mechanical Properties
| Property | Value |
| Tensile Strength | 520 MPa (min) |
| Yield Strength | 205 MPa (min) |
| Elongation | 30% (min) |
| Hardness (HV) | 140 (min) |
Physical Properties
| Property | Value |
| Density | 0.323 lb/in^3^ |
| Melting Point | 2260°F |
| Thermal Conductivity | 32 Btu/ft/hr/°F |
| Electrical Conductivity | 5.5% IACS at 68°F |
Process Performance
| Property | Performance |
| Hot Working | Excellent |
| Cold Working | Good |
| Machinability | Fair |
| Weldability | Excellent |
| Solderability | Good |
Steel Grade
ASTM B111 C71500 falls under the category of copper-nickel alloys with specific compositions designated by ASTM standards.
Application
This alloy is widely used in various industries, including:
Marine: Shipbuilding, offshore structures, and seawater piping systems
Petrochemical: Heat exchangers, condensers, and piping systems for corrosive environments
Power Generation: Cooling systems, condensers, and steam turbine components
Chemical Processing: Equipment and piping for handling corrosive chemicals
HVAC and Refrigeration: Heat exchangers and evaporators
Possible Alternative Grades
While ASTM B111 C71500 offers excellent corrosion resistance and mechanical properties, there are alternative grades available for specific applications. Some alternatives include:
ASTM B111 C70600 (90/10 copper-nickel alloy) for applications requiring higher thermal conductivity
ASTM B111 C70620 (90/10 copper-nickel alloy with reduced iron content) for improved corrosion resistance
ASTM B111 C68700 (Aluminum Brass) for applications requiring enhanced resistance to biofouling and erosion
Always consult with materials engineers and industry standards to select the most suitable alloy for your specific application requirements.
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