Chemical Composition
C71500 copper plate is a high-strength copper-nickel alloy with a nominal composition of 30% nickel and 70% copper. It also contains small amounts of iron, manganese, and other elements. The chemical composition of C71500 copper plate ensures its high strength, excellent corrosion resistance, and good thermal conductivity.

Mechanical Properties
C71500 copper plate has excellent mechanical properties. The tensile strength of C71500 copper plate ranges from 620 MPa to 790 MPa, and the yield strength ranges from 240 MPa to 420 MPa. The elongation at break of C71500 copper plate is more than 30%, indicating its ductility and toughness. In addition, C71500 copper plate has good fatigue resistance and impact toughness.

Hardness Classification
C71500 copper plate is classified into three different hardness levels, which are soft, half-hard, and hard. The hardness of C71500 copper plate is measured using the Rockwell B scale. Soft C71500 copper plate has a hardness of 65-80, while half-hard C71500 copper plate has a hardness of 85-95. Hard C71500 copper plate has a hardness of 95-110. The different hardness levels of C71500 copper plate make it suitable for various applications.

Applications
C71500 copper plate has a wide range of applications due to its excellent mechanical properties and corrosion resistance. Soft C71500 copper plate is mainly used in the manufacture of heat exchangers, condensers, and evaporators. Half-hard C71500 copper plate is used in marine applications, such as seawater piping systems, marine hardware, and propellers. Hard C71500 copper plate is used for bushings in heavy-duty machinery and equipment, such as hydraulic presses, forging machines, and rolling mills.

Conclusion
In summary, C71500 copper plate is a high-strength copper-nickel alloy with excellent mechanical properties and corrosion resistance. Its chemical composition, mechanical properties, hardness classification, and applications make it ideal for various industries and applications.