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Details
Cupronickel is a copper-based alloy with nickel as the main added element. It is silvery white and has a metallic luster. The following is a detailed description of white copper:
Composition and characteristics:
In white copper, copper and nickel can be infinitely dissolved to form a continuous solid solution. Regardless of the proportion, they maintain the α-single-phase alloy state. When the nickel content exceeds 16%, the alloy color becomes as white as silver. The higher the nickel content, the whiter the color. Usually, the nickel content in white copper is 25%.
Pure copper plus nickel can significantly improve strength, corrosion resistance, hardness, resistance and thermoelectricity, and reduce the temperature coefficient of resistivity. Therefore, the mechanical and physical properties of white copper are extremely good, with good ductility, high hardness, beautiful color, corrosion resistance, and rich deep drawing performance.
Application:
Due to its excellent performance, white copper is widely used in shipbuilding, petrochemical, electrical appliances, instruments, medical equipment, daily necessities, handicrafts and other fields. At the same time, it is also an important resistor and thermocouple alloy.
Specific types of white copper, such as nickel white copper (nickel white copper), are also used for crystal oscillator component housings, crystal housings, sliders for potentiometers, etc.
Classification:
White copper can be classified according to its composition and use. For example, ordinary white copper is a copper-nickel binary alloy, in which the letter B represents the content of nickel added, such as B10, which means that the nickel content is about 10%.
In addition to ordinary white copper, there are white coppers with added third elements (such as zinc, manganese, aluminum, etc.), such as zinc white copper, manganese white copper, aluminum white copper, etc., which have their own unique properties and uses.
Advantages and Disadvantages:
The advantages of white copper are its excellent mechanical and physical properties, as well as good corrosion resistance and deep drawing properties. However, its main added element nickel is a scarce strategic material and is relatively expensive, which is a major disadvantage of white copper.
Other related information:
White copper can also change its properties and uses by adding other elements (such as iron, chromium, tin, titanium, cobalt, silicon, aluminum, etc.). For example, copper-nickel alloy has high strength and corrosion resistance, especially the ability to resist corrosion from flowing seawater; copper-nickel alloy has low temperature coefficient of resistance and good processability; copper-nickel alloy has excellent comprehensive mechanical properties and corrosion resistance; and copper-nickel alloy is mainly used for various high-strength corrosion-resistant parts in industrial sectors such as shipbuilding, electric power, and chemical industry.
In summary, copper-nickel alloy is a copper-based alloy with wide applications and excellent performance. Its characteristics and uses vary depending on the composition and added elements.
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