Brass classification

Brass materials are called special brass if they are a variety of alloys composed of more than two elements. Such as lead, tin, manganese, nickel, iron, silicon, copper alloy. Brass has strong wear resistance. Special brass is also called special brass, which has high strength, high hardness and strong chemical corrosion resistance. And the mechanical properties of cutting are also outstanding. Seamless copper pipe drawn from brass has soft quality and strong wear resistance. Brass seamless pipe can be used for heat exchanger and condenser, low temperature pipeline, submarine transportation pipe. Manufacture sheet, strip, bar, pipe, casting parts, etc. Copper content is 62% - 68%, plastic is strong, and pressure resistant equipment is manufactured.

According to the different types of alloy elements in brass, brass can be divided into two types: ordinary brass and special brass. Brass used for pressure processing is called deformation brass.

purpose

It can be used for various deep drawing and bending parts, such as pins, rivets, washers, nuts, conduits, barometers, screen, radiator parts, etc. It has good mechanical properties, good plasticity in hot state, good plasticity in cold state, good machinability, easy fiber welding and welding, corrosion resistance, and is widely used in common brass varieties.

characteristic

Brass is an alloy of copper and zinc. The simplest brass is copper zinc binary alloy, known as simple brass or ordinary brass. The brass with different mechanical properties can be obtained by changing the zinc content in brass. The higher the content of zinc in brass, the higher the strength and lower plasticity. The zinc content of brass used in industry is less than 45%, and the brittleness will be produced when the zinc content is higher, which will make the alloy properties worse. In order to improve some properties of brass, brass with other alloy elements added on the basis of one element brass is called special brass. The commonly used alloy elements are silicon, aluminum, tin, lead, manganese, iron and nickel. Adding aluminum in brass can improve the yield strength and corrosion resistance of brass, and slightly reduce the plasticity. Brass with less than 4% aluminum has good comprehensive properties such as processing and casting. Adding 1% tin to brass can significantly improve the brass's ability to resist seawater and marine atmospheric corrosion, so it is called "Navy brass". Tin can also improve the cutting performance of brass. The main purpose of adding lead to brass is to improve the cutting and wear resistance, and lead has little influence on the strength of brass. Manganese brass has good mechanical properties, thermal stability and corrosion resistance. Adding aluminum to manganese brass can also improve its performance and get smooth casting surface. Brass can be divided into casting and pressure processing.