Red copper is pure copper, also known as copper, and its chemical formula is Cu.
Brass is a mixture, has no chemical formula and is an alloying element. Brass can be divided into ordinary brass and special brass. Brass is a kind of copper alloy with zinc as the main additive element, which has a beautiful yellow color and is collectively called brass. Copper-zinc binary alloy is called ordinary brass or simple brass. Brass containing more than three elements 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 containing 30% zinc is often used to make shell casings, commonly known as shell brass or 73 brass. Brass alloy containing 36 ~ 42% zinc is composed of solid solution, of which 64 brass containing 40% zinc is the most commonly used. In order to improve the properties of ordinary brass, other elements are often added, such as aluminum, nickel, manganese, tin, silicon, lead and so on. Aluminum can improve the strength, hardness and corrosion resistance of brass, but reduce the plasticity, which is suitable for corrosion-resistant parts such as condenser pipes of seagoing ships. Tin can improve the strength of brass and its corrosion resistance to seawater, so it is called navy brass and used as marine thermal equipment and propeller. Lead can improve the machinability of brass; This kind of free-cutting brass is often used as clock parts. Brass castings are usually used to make valves and pipe fittings.
The code name is represented by "H+ number", H stands for brass, and the number represents the mass fraction of copper.
For example, H68 stands for brass with copper content of 68% and zinc content of 32%, with the word "Z" before the symbol. For example, Zcuzn38 and ZH62 represent brass, with zinc content of 38% and the rest being copper.
H90 and H80 are single-phase and golden yellow, so they are called gold, called electroplating, decorations, medals, etc.
H68 and H59 belong to biphase brass, which are widely used in the structural parts of electrical appliances, such as bolts, nuts, washers and springs.
Generally speaking, single-phase brass is used for cold deformation and double-phase brass is used for hot deformation.
Code of special brass: it means "H+ symbol of main added elements (except zinc)+mass fraction of copper+mass fraction of main added elements+mass fraction of other elements". For example, HPb59- 1 indicates that the mass fraction of copper is 59%, the mass fraction of lead containing main additive elements is 1%, and the rest is lead brass containing zinc.
Phosphor copper (phosphor bronze) (tin bronze) (tin phosphor bronze) is also a mixture, which consists of bronze and degasser 0.03-0.35% phosphorus, 5-8% tin and other trace elements such as iron, iron, zinc and zinc. It has good ductility and fatigue resistance, can be used as electrical and mechanical materials, and has higher reliability than ordinary copper alloy products.
QSn6.5-0. 1 phosphor copper
QSn6.5-0.4 phosphor copper
QSN7-0.2 phosphor copper
Beryllium copper is a copper alloy with beryllium as the main alloying element, also known as beryllium bronze. It is a high-grade elastic material with the best performance in copper alloy, and has the characteristics of high strength, high elasticity, high hardness, high fatigue strength, small elastic lag, corrosion resistance, wear resistance, cold resistance, high conductivity and non-magnetism. Commonly used beryllium bronzes are Cu-2be-0.5co-0.3si, Cu-2.6be-0.5co-0.3si and Cu-0.5be The beryllium content in the processed beryllium bronzes is controlled below 2%, and 0.3% nickel or 0.3% cobalt is added to the domestic beryllium copper. Commonly used beryllium bronzes are: Cu-2be-0.3Ni, Cu- 1.9be-0.3Ni-0.2ti, etc. Produce a series of excellent physical, chemical and mechanical properties such as no spark.