What is the difference between brass, copper, bronze and white copper?
The differences between brass, copper, bronze and white copper are as follows:
1. The colors are different. The color of brass is yellow, the color of red copper is purple-red, the color of bronze is bluish, and the color of white copper is silver-white.
2. The chemical elements are different.
Brass is an alloy composed of copper and zinc. Brass composed of copper and zinc is called ordinary brass. If it is composed of more than two elements, often added elements include lead, tin, aluminum, etc. Various alloys are called special brass.
Red copper is a relatively pure type of copper. It can generally be considered to be pure copper, but it is not necessarily pure copper. Sometimes a small amount of deoxidizing elements or other elements are added to improve the material and performance, so it is also classified as a copper alloy.
Bronze is an alloy in which tin or lead is added to pure copper (red copper).
White copper is a copper-based alloy with nickel as the main added element. The copper-nickel binary alloy is called ordinary cupronickel; the cupronickel alloy with elements such as manganese, iron, zinc, aluminum and so on is called complex cupronickel.
3. The uses are different.
Brass has strong wear resistance and is often used to manufacture valves, water pipes, connecting pipes for internal and external air conditioners and radiators.
The electrical conductivity and thermal conductivity of red copper are second only to silver, and it is widely used in making electrical and thermal conductive equipment. Red copper has good corrosion resistance in the atmosphere, seawater, certain non-oxidizing acids (hydrochloric acid, dilute sulfuric acid), alkali, salt solutions and various organic acids (acetic acid, citric acid).
Bronze has the characteristics of low melting point, high hardness, strong plasticity, wear resistance, corrosion resistance, and bright color. It is suitable for casting various appliances, mechanical parts, bearings, gears, etc.
Compared with other copper alloys, white copper has exceptionally good mechanical and physical properties. It has good ductility, high hardness, beautiful color, corrosion resistance, and deep drawing properties. It is widely used in shipbuilding, petrochemical industry, electrical appliances, instruments, medical equipment, and daily necessities. , handicrafts and other fields, and is also an important resistor and thermocouple alloy.
The world's copper resources are relatively abundant. Copper is not difficult to extract from its ore, but mineable deposits are relatively rare. The world's proven copper is about 350 to 570 million tons, of which porphyry copper deposits account for about 76% of the total. In terms of regional distribution, there are five regions with the richest copper reserves in the world:
Africa : Congo Luylu (Kolwezi), Hitulu, Zambia Luanshya and Baliba, Mufulira, Nchanga TLP, Nkana (Lokana).
Asia: China Silver (Jinchuan)/Gansu, Shandong/Yanggu Xiangguang Copper Daye, Guixi, Huludao, Jinchang, Shanghai, Tianjin, Yunnan, India Birla Copper (Dahai), Tuticorin, Salcesme, Iran, Besshi/Ehime, Japan (Toyo Smelter). Kosaka (Akita), Naoshima (Kagawa), Onahama (Fukushima), Saga Seki (Oita), Tamano (Okayama), Kazakhstan Balkashmys, Jezkazgan Smelter, Onsan, South Korea Smelter I, Wenshan Smelter II, Philippines Isabel/Wright (Philippine Smelting and Refining Association), Uzbekistan Almarek Smelter.
Europe: Brickslag, Austria, Belse, Belgium; Hoboken, UM Pierdorp, Finland, Harjavalta, Germany, Hamburg, Herterstedt, Lunen 170, Potemagra, Italy, Gwogu, Poland Gov I, Głogów II, Legnica smelting plant, Zlatna smelting plant in Romania, Kirovgrad (Karata), Russia, Krasnouralsk smelting plant, Nadezhkinsky, Norilsk smelting plant, Central Uralsk smelting plant, Huelva, Spain, Sweden, Walsall, UK, Bor, Yugoslavia.
