What is the difference between brass, copper, bronze, and white copper?

by:Caiyi     2019-12-26
What is the difference between brass, copper, bronze, and white copper? 1, the color is not the same. The brass color is yellow, the copper is purplish red, the bronze color is blue, and the white copper is silvery white. 2. The chemical elements of the composition are different: Brass brass copper alloy with zinc as the main additive element has beautiful yellow color, collectively referred to as brass. Copper-Zinc binary alloy is called ordinary brass or simple brass. Brass above three yuan is called special brass or complex brass. Brass alloy with zinc content less than 36% is composed of solid solution and has good cold working performance. For example, brass with zinc content of 30% is often used to make cartridge case, commonly known as cartridge case brass or 73 brass. Zinc in 36 ~ The brass alloy between 42% consists of solid solution, of which the most commonly used is 64 brass containing 40% zinc. In order to improve the performance of ordinary brass, other elements such as aluminum, nickel, manganese, tin, silicon, lead, etc. are often added. Aluminum can improve the strength, hardness and corrosion resistance of brass, but reduce the plasticity. It is suitable for seagoing condenser tubes and other corrosion resistant parts. Tin can improve the strength of brass and its corrosion resistance to seawater, so it is called Navy brass and is used as ship Thermal Equipment and propeller. Lead can improve the cutting performance of brass; This kind of easy-cutting brass is often used as a watch part. Brass castings are often used to make valves and pipe fittings. Copper is an alloy formed by adding one or more other elements to a pure copper matrix. Pure copper is purplish red, also known as copper. Pure copper density is 8. 96, melting point 1083 ℃, with excellent electrical conductivity, thermal conductivity, ductility and corrosion resistance. It is mainly used for making electrical equipment such as generators, busbars, cables, switching devices, Transformers, heat exchangers, pipelines, flat plate collectors of solar heating devices and other heat conduction equipment. Commonly used copper alloys are divided into three categories: brass, bronze and white copper. Bronze originally refers to copper-tin alloy, and copper alloy except brass and white copper is called bronze, and is often named after the first major additive element before the bronze name. Tin bronze has good casting performance, antifriction performance and mechanical properties, and is suitable for manufacturing bearings, worm gears, gears, etc. Lead bronze is a widely used bearing material for modern engines and grinding machines. Aluminum bronze has high strength, good wear resistance and corrosion resistance, and is used for casting high-load gears, shaft sleeves, marine propellers, etc. Beryllium bronze and phosphor bronze have high elastic limit and good electrical conductivity, and are suitable for manufacturing precision springs and electrical contact elements. Beryllium bronze is also used to manufacture non-sparking tools used in coal mines and oil depots. Cupronickel cupronickel copper alloy with nickel as the main additive element. Copper-nickel binary alloy is called ordinary white copper; White copper alloy with manganese, iron, zinc, aluminum and other elements is called complex white copper. Industrial white copper is divided into structural white copper and electrical white copper. The structure of white copper is characterized by good mechanical properties and corrosion resistance, and beautiful color. This kind of white Copper is widely used in the manufacture of precision machinery, chemical machinery and ship components. Electrician white copper generally has good thermoelectric properties. Manganese copper, constantan and Kao copper are manganese white copper with different manganese contents. They are materials for manufacturing precision electrical instruments, varistors, precision resistors, strain gauges, thermocouples, etc. 3, the use is different. Brass has strong wear resistance. Brass is often used to make valves, water pipes, connecting pipes and radiators inside and outside air conditioners. The conductivity and thermal conductivity of copper are second only to silver, and are widely used in the production of conductive and thermal conductivity equipment. Copper in the atmosphere, seawater and some non-oxidizing acids (Hydrochloric acid, dilute sulfuric acid), Alkali, salt solution and a variety of organic acids (Acetic acid, citric acid)There is good corrosion resistance. Bronze has the characteristics of low melting point, high hardness, strong plasticity, wear resistance, corrosion resistance, bright color, etc. It is suitable for casting various appliances, mechanical parts, bearings, gears, etc. Compared with other copper alloys, white copper has excellent mechanical and physical properties, good ductility, high hardness, beautiful color, corrosion resistance and deep drawing properties, it is widely used in shipbuilding, petrochemical, electrical appliances, instruments, medical devices, daily necessities, handicrafts and other fields, and is also an important resistance and thermocouple alloy.
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