Pure copper, also known as red copper, is light rose or light red. After copper oxide film is formed on the surface, the appearance is purple red. Copper has many valuable physical and chemical properties, such as its thermal conductivity and electrical conductivity are very high, its electrical conductivity is second only to silver, and its thermal conductivity is second only to silver and gold. Strong chemical stability, easy to melt, in the atmosphere, fresh water, sea water has good corrosion resistance; High plasticity, can well withstand various cold and hot pressure processing, the disadvantage is low strength and hardness, generally do not make structural parts; Good ductility, pure copper can be drawn into very thin copper wire, CNC sheet metal processing made of very thin copper foil; can form an alloy with zinc, tin, lead, manganese, cobalt, nickel, aluminum, iron and other metals.
Brass-copper-zinc alloy. The color changes from yellow-red to yellow with the increase of zinc content. Brass has higher mechanical properties than pure copper, and it will not rust or be corroded under normal circumstances; it has good plasticity and is widely used in the production of various structural parts in the machinery manufacturing industry.
bronze-copper-tin alloy (except zinc and nickel, Taiwan gold with other elements is called bronze). Special-shaped sheet metal plus has good wear resistance, mechanical properties, casting performance and corrosion resistance. The content of tin in the alloy is generally not more than 10%, too high to reduce its plasticity. In addition to tin, tin bronze generally contains a small amount of zinc, lead, phosphorus, nickel and other elements. Zinc can improve the mechanical properties and fluidity of tin bronze. Lead can improve the wear resistance and machinability of bronze, but reduce its mechanical properties. Nickel can improve the toughness, hardness, wear resistance and fluidity of bronze.
special bronze (wuxi bronze)-steel-based alloy does not contain tin but contains aluminum, nickel, manganese, silicon, iron, lead and other special elements.
White copper-copper-nickel alloy. It is divided into structural copper-nickel alloy and electrical copper-nickel alloy. The structural copper-nickel alloy has high mechanical properties and good corrosion resistance. Electrical copper-nickel alloys generally have special thermoelectric properties and are widely used in electrical technology.
the famous manganese copper, constantan and kaotong in the industry are manganese cupric copper with different manganese content. they are indispensable electrical materials for stainless steel laser processing precision electrical measuring instruments, rheostats, thermocouples, electric heaters, etc. Another, copper in the sheet metal processing process also has different hardness of copper, such as semi-hard/hard, etc.; there are soft copper for stretching process, forming effect is better.
