Cupronickel
Copper 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 cupronickel is widely used in the manufacture of precision machinery, eyewear accessories, 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, thermocouples, etc.
Brass
Brass is an alloy composed of copper and zinc. If it is only composed of copper and zinc, it is called ordinary brass. Brass is often used to make valves, water pipes, connecting pipes for internal and external air conditioners, and radiators.
If it is a variety of alloys composed of two or more elements, it is called special brass. Such as copper alloys composed of lead, tin, manganese, nickel, iron, and silicon. Special brass is also called special brass. It has high strength, high hardness and strong chemical resistance. The mechanical properties of cutting are also outstanding. Brass has strong wear resistance. The seamless copper tube drawn from brass is soft and has strong wear resistance. Brass seamless pipes can be used for heat exchangers and condensers, cryogenic pipelines, and subsea transportation pipes. Manufacture of sheets, bars, bars, pipes, casting parts, etc. The copper content is 62%～68%, the plasticity is strong, and it is used to manufacture pressure-resistant equipment.
According to the different types of alloying elements contained in brass, brass is divided into two types: ordinary brass and special brass. Brass used for pressure processing is called deformed brass. Brass is 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 containing less than 36% zinc are composed of solid solutions and have good cold working properties. For example, brass containing 30% zinc is commonly used to make bullet casings, commonly known as bullets
Shell brass or seven-three brass. Brass alloys with a zinc content of 36 to 42% are composed of solid solutions, and the most commonly used is the six-four brass with a zinc content of 40%. 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 condensing tubes 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, and this kind of free-cutting brass is often used as watch parts. Brass castings are often used to make valves and pipe fittings.
Bronze
Bronze is the earliest copper used in my country and has a history of more than 3,000 years.
Bronze originally refers to copper-tin alloy, and later copper alloys other than brass and cupronickel are called bronze, and the name of the bronze is often prefixed with the name of the first major added element. Tin bronze has good casting performance, anti-friction performance and good mechanical performance, and 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, and is used to cast high-load gears, shaft sleeves, and marine propellers. Phosphor bronze has high elastic limit and good conductivity, and is 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. Beryllium copper is a supersaturated solid solution copper-based alloy with good mechanical properties, physical properties, chemical properties and corrosion resistance; powder metallurgy production is aimed at tungsten steel, high carbon steel, high temperature resistant super hard alloy molds when electrical corrosion is required , Due to the large loss and slow speed of ordinary electrodes, tungsten copper is an ideal material. Flexural strength ≥667Mpa.
Pure copper
High-quality red copper has high purity, fine structure and extremely low oxygen content. No pores, trachoma, looseness, excellent electrical conductivity, suitable for electro-etching molds, after heat treatment, the electrode has no directionality, suitable for precision and fine beating.
