What Is The Difference Between Brass, Copper, Bronze And Cupronickel?


Brass is a copper alloy with zinc as the main added element. It has a beautiful yellow color and is collectively called brass. The copper-zinc binary alloy is called ordinary brass or simple brass. Brass with more than three yuan is called special brass or complex brass. Brass alloys containing less than 36% zinc are composed of solid solutions and have good cold workability. For example, brass with 30% zinc is commonly used to make shells. Brass alloys containing between 36 and 42% zinc are composed of solid solutions, of which brass containing 40% zinc is commonly used. In order to improve the performance of ordinary brass, other elements are often added, such as aluminum, nickel, manganese, tin, silicon, lead, etc. Aluminum can improve the strength, hardness and corrosion resistance of brass, but reduce the plasticity. It is suitable for sea-wheel condenser and other corrosion-resistant parts.

Tin can improve the strength of brass and the corrosion resistance to seawater, so it is called * brass and is used as thermal equipment for ships and propellers. Lead can improve the cutting performance of brass; this free-cutting brass is often used as a watch part. Brass castings are commonly used to make valves and pipe fittings.


Red copper:

Red copper is an alloy composed of pure copper and one or several other elements. Pure copper is purple-red, also known as red copper. Pure copper has a density of 8.96 and a melting point of 1083 ° C. It has excellent electrical conductivity, thermal conductivity, ductility and corrosion resistance. It is mainly used to make electrical equipment such as generators, busbars, cables, switchgears, transformers and other heat conduction equipment such as heat exchangers, pipelines, and flat-plate collectors of solar heating devices. Commonly used copper alloys are divided into three categories: brass, bronze, and cupronickel.



Bronze originally refers to copper-tin alloy, and copper alloys other than brass and white copper are all called bronze, and are often preceded by the name of * mainly added element before the bronze name. Tin bronze has good casting performance, anti-friction performance and good mechanical performance, and is suitable for manufacturing bearings, worm gears and gears. 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, bushings, marine propellers, etc. Beryllium bronze and phosphor bronze have high elastic limit and good 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.



White copper is a copper alloy with nickel as the main added element. The copper-nickel binary alloy is called ordinary white copper; the white copper alloy added with manganese, iron, zinc, aluminum and other elements is called complex white copper. Industrial copper is divided into structural copper and electrical copper. The structure of copper-nickel alloy is characterized by good mechanical properties and corrosion resistance and beautiful color. This white copper is widely used in manufacturing precision machinery, chemical machinery and ship components. Electrotechnical white copper generally has good thermoelectric properties. Manganese copper, constantan, and copper are manganese white copper with different manganese content. They are materials used to manufacture precision electrical instruments, varistor, precision resistance, strain gauges, thermocouples and so on.