C71000 is a copper-nickel alloy, also known as 82-20 copper-nickel alloy. It consists mainly of copper (Cu) and nickel (Ni), with a copper content of about 82% and a nickel content of about 20%. It also contains small amounts of iron (Fe), manganese (Mn) and silicon (Si).
Chemical composition
The specific chemical composition of C71000 is as follows:
Copper (Cu): 82%
Nickel (Ni): 20%
Iron (Fe): 1.5% max.
Manganese (Mn): 0.5% max.
Physical Properties
The main physical properties of C71000 alloy include:
Melting point: 1290°C
Thermal conductivity: approximately 30 W/(m-K)
Electrical conductivity: approx. 30% IACS (International Accepted Conductivity Standard)
Mechanical Properties
C71000 has high mechanical strength at room temperature, its tensile strength can reach about 420MPa, and its hardness is generally between HB110-130. In the annealed state, the tensile strength is usually 480MPa (69,600psi), and in the cold-worked state it can reach 620MPa (89,900psi). The yield strength is about 150MPa (21,750psi) in the annealed condition and can be increased to 310MPa (44,950psi) in the cold worked condition.
Corrosion resistance
Due to its high nickel content, C71000 exhibits excellent corrosion resistance, especially in seawater environments, where it can effectively resist corrosion caused by chloride ions. The corrosion resistance rate in seawater is extremely low, typically 0.02 mm/year.
Areas of Application
Due to its excellent seawater corrosion resistance, C71000 alloy is widely used in the field of marine engineering, such as seawater coolers, ship components, and offshore platforms. It is also used in aerospace, petrochemical and other fields as a key structural material.
Conclusion
To summarize, C71000 is a high-performance copper-nickel alloy known for its excellent corrosion resistance, good mechanical properties and electrical conductivity, and is widely used in a variety of harsh industrial environments.
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