I. Pure Copper
Grade T1, T2, T3. industrial pure copper, T1 of the highest purity, copper + silver element content > 99.95%, no requirement for phosphorus elements, with good electrical and thermal conductivity, corrosion resistance and processing performance, can be welded and brazed, but trace amounts of oxygen in the high temperature reductive atmosphere on the processing and use of a certain impact;
T2 of copper + silver element content > 99.9%, containing less impurities that reduce electrical and thermal conductivity, performance is similar to T1;
T3’s purity is relatively low, its performance indicators are slightly inferior to T1 and T2.
Pure copper T1, T2, T3 commonly used in wires, cables, conductive screws and other conductive performance requirements of high occasions.
TU1, TU2: oxygen-free copper. On the basis of pure copper to further reduce the oxygen content, with higher purity and better conductive properties, mainly used in the strict requirements of the oxygen content of the electronic, electrical and other fields.
Brass
Ordinary brass:
H59: Containing about 59% copper, the rest is mainly zinc. Strength, hardness, but relatively poor plasticity, in the hot state can still better withstand pressure processing, corrosion resistance in general, the price is cheaper, commonly used in general machine parts, welding, hot punch and hot parts.
H62: copper content of about 62%, has good mechanical properties, good plasticity in the hot state, cold plasticity is also good, good cutting, easy brazing and welding, corrosion resistance, but easy to produce corrosion rupture, is a widely used varieties of common brass, can be used for a variety of deep drawing and bending of the manufacture of the stressed parts, such as pins, rivets, washers, nuts, conduits, barometer springs, sieve mesh, radiator parts and so on.
H65: performance between H68 and H62, high strength and plasticity, can withstand cold and hot pressure processing, but there is a tendency to corrosion rupture, commonly used in small hardware, daily necessities, small springs, screws, rivets and mechanical parts.
H68: copper content of about 68%, with extremely good plasticity (is the best in brass) and high strength, good cutting performance, easy to weld, commonly used in complex cold-drawn parts and deep-drawn parts, such as radiator shells, conduits, bellows, shells, gaskets and so on.
Complex brass: HPb59-1: it is a kind of free-cutting brass, which contains lead element in addition to copper and zinc, the addition of lead improves the cutting performance of brass, and it is commonly used in parts with high requirements for cutting performance, such as screws and nuts.
HFe58-1-1: brass containing iron element, the addition of iron improves the strength and hardness of brass, suitable for some occasions with high strength requirements.
III. Bronze
Tin bronze: QSn4-3: Containing about 4% of tin and 3% of zinc. Has good wear resistance, corrosion resistance and elasticity, can be used for the manufacture of springs, bearings, gears and other wear-resistant parts, but also commonly used in the production of lamps and lanterns spring plate, switch spring plate and other parts of the elasticity requirements.
QSn6.5-0.4: higher tin content, with better casting performance and corrosion resistance, suitable for the manufacture of a number of complex shapes, high corrosion resistance requirements of parts, such as turbines, gears and so on.
Aluminum bronze: QAl5: aluminum content of about 5%, with high strength and corrosion resistance, in the atmosphere, seawater and other environments with good corrosion resistance, commonly used in the manufacture of ship parts, chemical machinery parts.
QAl9-2: higher aluminum content, strength and hardness than QAl5 higher, can be used to manufacture high-strength wear-resistant parts and corrosion-resistant parts.
Beryllium bronze: QBe2: beryllium content of about 2%, with very high strength, hardness and elasticity, as well as good electrical and thermal conductivity, commonly used in the manufacture of precision instruments, instruments, elastic components, wear-resistant parts, such as clocks and watches clockwork, spring plate.
Fourth, white copper
Ordinary white copper: B19: nickel content of about 19%, with high strength and corrosion resistance, stable physical properties at room temperature, commonly used in the manufacture of precision instruments, thermocouples, clock parts.
B30: nickel content of about 30%, better corrosion resistance, commonly used in instruments and medical equipment.
Complex white copper: BZn15-20: white copper containing zinc, the addition of zinc improves the strength and plasticity of white copper, can be used for the manufacture of some structural complex parts.
BFe30-1-1: white copper containing iron elements, the addition of iron to improve the corrosion resistance and strength of white copper, suitable for some of the higher requirements for corrosion resistance and strength of the occasion.
