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How to Distinguish Copper Material and Its Use


As for copper, we may all be used to it. In our daily life, each of us can say that we can't do without copper products. But even so, there are still many people who can't distinguish the same material correctly. Today, let Xiaobian lead us to distinguish different copper materials and talk about their uses.

Copper materials can be simply divided into two categories, one is pure copper, the other is the composition of various copper alloys. What is copper alloy? According to Baidu Library, alloy is a material with metallic properties synthesized by two or more metals and metals or non-metals by a certain method. It is usually obtained by melting homogeneous liquids and solidification. Copper alloys, apparently, contain copper. It can be simply understood that copper alloy is composed of pure copper matrix and one or several other elements.

According to the classification criteria of non-ferrous metals in China, pure copper can be further divided into three categories: oxygen-free copper, copper and phosphorus-deoxidized copper. The purity of oxygen-free copper is more than 99.95%. Because of its high conductivity, stable processing performance, good weldability, corrosion resistance and low temperature performance. Therefore, it is widely used in the manufacture of confluence bars, conductive strips, waveguides, coaxial cables, vacuum seals, vacuum tubes, transistors, etc. Usually we refer to copper, which contains more than 99.95% copper, and only a very small amount of impurities, because the purity of copper is very high, for this reason, the conductivity of copper is greatly reduced compared with other copper materials. Copper is widely used in making electrical equipment and heat exchangers such as generators, buses, cables, switchgear, transformers, etc. Copper content of phosphorus deoxidizer reaches 99.90% and has good welding and cold bending properties. Copper is widely used in making gasoline or gas conveyor pipes, drainage pipes, condensation pipes, mine pipes, condensers, evaporators, heat exchangers and train box parts.

The classification of copper alloys is generally divided into the following four categories: brass, bronze, white copper and silver copper.

Brass refers to the alloy based on copper and zinc. Because of its high strength, high hardness and strong chemical corrosion resistance, it is widely used in making heat exchangers and condensers, low temperature pipelines, submarine transportation pipes, sheet, strip, bar, pipe, casting parts, etc.

Bronze originally refers to copper-tin alloy. Because of its high strength, good sliding friction resistance, excellent cutting performance and good welding performance, bronze has good corrosion resistance in air and fresh water. For this reason, bronze is widely used in spring, spring and other elastic components as well as pipe fittings, chemical equipment, wear-resistant parts and anti-magnetic parts, as well as in the manufacture of aviation, automobile and traction. Brass is a copper-based alloy with nickel as the main additive element, which has good ductility, high hardness, beautiful color, corrosion resistance and deep drawing properties. It is widely used in shipbuilding, petrochemical industry, electrical appliances, instrumentation, medical equipment, daily necessities, handicraft and other fields, and is also an important resistance and thermocouple alloy.

The disadvantage of white copper is that nickel is a scarce strategic material and its price is relatively high.

Silver copper is a binary alloy of silver and copper. Its outstanding characteristics are strong sulfide resistance, good conductivity, fluidity and wettability, good mechanical properties, high hardness, wear resistance and weldability. It is widely used to make contacts, conductive rings and contactors of air circuit breakers, voltage controllers, telephone relays, contactors, starters and other devices. Vacuum solder, rectifier, coins, ornaments and tableware can also be manufactured.