Commonly used brass materials:
Brass profile is one of the most commonly used profiles. It is the characteristics of corrosion resistance, oxidation resistance, strong plasticity, long service life, and atmospheric appearance. However, copper profiles can be divided into copper, brass, bronze, cupronickel, etc. according to the copper content.
The brass profile is composed of pure copper as the matrix and adding one or more 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, bus bars, cables, switchgear, transformers, heat exchangers, pipelines, flat plate collectors of solar heating devices and other heat conduction equipment.
Brass: A copper alloy with zinc as the main additive element. It has a beautiful yellow color and is collectively referred to as brass. 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 with a zinc content of less than 36% are composed of solid solution and have good cold working properties. For example, brass with a zinc content of 30% is commonly used to make bullet cases, commonly known as bullet case brass or seven-three brass. Brass alloys with a zinc content between 36% and 42% are composed of solid solutions, and the most commonly used is six-four brass with 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 increase the strength, hardness and corrosion resistance of brass, but reduce its plasticity. It is suitable for marine condensers and other corrosion-resistant parts. Tin can improve the strength of brass and its corrosion resistance to seawater, so it is called naval brass and is used for ship thermal equipment and propellers. Lead can improve the cutting performance of brass; this kind of free-cutting brass is often used as watch parts. Brass castings are often used to make valves and pipe fittings.
Bronze originally refers to copper-tin alloy, and later copper alloys other than brass and cupronickel are called bronze, and the name of bronze is often prefixed with the name of the first major additive element. Tin bronze has good casting performance, anti-friction performance and good mechanical performance. It is suitable for manufacturing bearings, worm gears, gears, etc. Lead bronze is a bearing material widely used in modern engines and grinders. Aluminum bronze has high strength, good wear resistance and corrosion resistance. It is used for casting high-load gears, shaft sleeves, and marine propellers. Beryllium bronze and phosphor bronze have high elastic limit and good conductivity. They are suitable for manufacturing precision springs and electrical contact components. Beryllium bronze is also used to make non-sparking tools used in coal mines and oil depots.
Cupronickel is a copper alloy with nickel as the main additive element. The copper-nickel binary alloy is called ordinary cupronickel; the cupronickel alloy with elements such as manganese, iron, zinc, and aluminum is called complex cupronickel. Industrial copper-nickel alloy is divided into two categories: structural copper-nickel alloy and electrical white copper-nickel alloy. Structural white copper is characterized by good mechanical properties and corrosion resistance, and beautiful color. This kind of copper-nickel alloy is widely used in the manufacture of precision machinery, chemical machinery and ship components. Electrical white copper generally has good thermoelectric properties. Manganese copper, constantan, and test copper are manganese-nickel alloys with different manganese content. They are used to manufacture precision electrical instruments, varistors, precision resistors, strain gauges, and thermocouples.
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