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Properties and uses of copper and copper alloy


Single mass of copper is copper, named for its color is purple. Copper is the industrial pure copper, its melting point is 1083 ℃, no allotropic transformation, the relative density of 8.9, about 15% heavier than ordinary steel. With red roses, purple after the formation of the oxide film on the surface, it is generally referred to as the copper.

Copper with excellent electrical conductivity, thermal conductivity, ductility and corrosion resistance. Mainly used for the production of generator, busbar, cable, switch gear, transformers and other electrical equipment and heat exchangers, pipes, solar heating device flat plate collectors such as thermal conductivity equipment.


Chromium zirconium copper (CuCrZr) chemical composition (wt)% (Cr :0.1-0 .8, Zr :0.3-0 .6) hardness (HRB78-83) conductivity 43ms / m softening temperature of 550 ℃.

Chromium zirconium copper has good electrical conductivity, thermal conductivity, high hardness, wear antiknock, crack resistance and high softening temperature.

Tin bronze

Tin bronze as the main alloying elements. The tin content is generally between 3 to 14%, mainly for the production of elastic components and wear parts. Deformation tin bronze tin containing not more than 8%, sometimes also added phosphorus, lead, zinc and other elements.

Popular brands QSn4-3, QSn4.4-2.5, QSn7-O.2, ZQSn10, ZQSn5-2-5, ZQSN6-6-3. Tin bronze is a the casting shrinkage minimum of non-ferrous alloys, can be used to produce complex shapes, contours clear, the hermetic modest casting. Tin bronze in the atmosphere, sea water, fresh water, and steam is very corrosion resistance, widely used in steam boilers and parts of ships. The phosphorus-containing tin bronze has good mechanical properties, can be used as a high precision machine tools, wear parts and elastic parts. Containing lead-tin bronze is often used as a wear-resistant parts and plain bearings. The zinc tin bronze for the high airtightness casting.


Brass is an alloy composed of copper and zinc. If only composed of copper, zinc, brass called ordinary brass. Brass is often used in the manufacture of valves, plumbing, air-conditioning inside and outside the machine connecting pipe and radiator. Brass has strong wear resistance. Special brass, also known as special brass, it strength, hardness, chemical resistance. Machining mechanical properties are more prominent.

Special brass

Adding elements such as aluminum, silicon, manganese, lead, tin, copper and zinc alloy on the formation of a special brass. Such as leaded brass, tin, brass, aluminum, brass, silicon brass, manganese brass.

Lead brass excellent cutting performance, wear resistance, widely used in the manufacture of watch parts, bearings and bushings casting production.

Tin brass corrosion resistance, widely used in the manufacture of parts of ships.

Aluminum brass, aluminum can improve the strength and hardness of brass, to improve the corrosion resistance in the atmosphere for manufacturing a corrosion-resistant parts, aluminum, brass.

Silicon in silicon brass copper can improve the mechanical properties, wear resistance corrosion resistance, silicon brass is mainly used in the manufacture of parts of ships and chemical mechanical parts.

Aluminum bronze

The aluminum content is generally not more than 11.5%, sometimes adding the right amount of iron, nickel, manganese and other elements, in order to further improve the performance. Aluminum bronze heat treatment to strengthen its strength than tin bronze, good high temperature oxidation resistance. Higher strength and good wear resistance for high strength screw, nut, copper sleeve, seal ring and wear-resistant components, the most prominent feature is its good wear resistance.

Contains iron, manganese, aluminum bronze, high strength and wear resistance, increased hardness after quenching and tempering, better high temperature corrosion and oxidation resistance in the atmosphere, freshwater and seawater corrosion resistance good machinability acceptable welding is not easy brazing, hot pressure processing.

Phosphor bronze

Mainly used as a wear-resistant parts and elastic element. Containing 2% to 8% tin, 0.1% to 0.4% phosphorus, the remainder of the copper alloy of copper. Phosphor bronze has a higher corrosion resistance, abrasion resistance, impact does not occur when the spark. For medium-speed, heavy duty bearings, maximum working temperature of 250 ° C. With self-aligning skew insensitive, the bearing force uniform high capacity, can be subject to both radial load, self-lubricating, no maintenance characteristics. Tin phosphor bronze is an alloy of copper, with good conductive properties, not easy fever, to ensure safety at the same time have a strong resistance to fatigue. Tin phosphor bronze jack reed hardwired electrical structure, without rivets or friction-free contacts to ensure good contact, good stretch, pluggable smooth. The alloy has excellent mechanical processing properties and performance of chip formation, can quickly shorten the parts processing time.

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