Brass fittings

Brass is composed of copper and zinc alloy. If it is only the copper, zinc composition of the brass called on ordinary brass. If it is from the above two kinds of elements called on the various special brass alloy. If the lead, tin, manganese, nickel, lead, iron, copper alloy composed of silicon. Brass has strong wear resistance. Special Brass special brass called it high strength, hardness, corrosion-resistant chemical. Also cutting the mechanical properties are more prominent. From the brass pull into a seamless brass, soft, strong wear resistance. Brass seamless tube heat exchanger and condenser can be used for low temperature piping, the Cross-Harbour transport tube. Manufacturing sheet metal, beams, rods, tubing, such as casting parts. Copper in 62% ~ 68%, plastic-to create pressure equipment.
According brass alloy elements contained in the different types, brass brass is divided into ordinary and special brass two. Pressure processing brass called deformation brass.
1. Ordinary brass
(1) General Organization ordinary brass at room temperature Cu-Zn binary alloy is brass, zinc variation range, so the room temperature organizations were very different. According Cu-Zn binary state diagram (Figure 6), the brass at room temperature three organizations: 35% zinc volume in the following brass, at room temperature microstructure from single-phase solid solution composed of α, α called brass; zinc in the 36% to 46% within the scope of brass, at room temperature by the microstructure (α + β) two-phase component, known as the (α + β) brass (two-phase Brass) ; zinc content in excess of 46 per cent to 50 per cent of the brass, at room temperature microstructure only by β phase, known as β brass. brass fitting
(2) pressure-α processing performance of brass (from the H96 and H65) has a good plasticity, can withstand the cold processing, but α brass in the single-phase heat processing, forging and other vulnerable emerging temperature brittle, with the specific temperature range volume containing Zn vary, generally between 200 to 700 ℃. Therefore, thermal processing temperature should be higher than 700 ℃. Single-phase α Brass temperature brittle zone is the main reason in the Cu-Zn alloy α phase of the region there is a Cu3Zn and orderly Cu9Zn two compounds, in the low-temperature heating in an orderly change to Alloy addition, Alloy in the amount of lead, bismuth and copper forming harmful impurities low melting point eutectic films distributed in the grain boundary, the thermal processing of a rupture between the crystal. Practice shows that, by adding small amount of cerium can be effectively eliminated in the temperature brittle.
Brass two-phase (from the H63 and H59), in addition to Alloy Plastic good α phase, but also emerged from the electronic CuZn-based compounds β-solid solution. Β-phase high temperature with high plasticity, and temperature of β 'phase (orderly solid solution) hard and brittle nature. Therefore, (α + β) brass should be carried out in the hot forging.brass ball valve
Zinc is greater than 46% to 50% of the β brass because of hard and brittle, not pressure processing.
(3) the mechanical properties of zinc brass because of different mechanical properties are different, Figure 7 is a brass mechanical properties of the zinc vary the curve. For α brass, with the increased volume of zinc, σ b and δ are rising. For (α + β) brass, zinc when volume increased to about 45%, at room temperature strength continues to increase. If further increase the volume of zinc, as Alloy has emerged in the greater fragility of the r (Cu5Zn8 compounds, as the solid solution), the drastic reduction in strength. (Α + β) at room temperature plastic brass were always with the increase in zinc and lower. So zinc in excess of 45% of the copper-zinc alloy no practical value.
2. Special brass fitting
In order to improve the corrosion resistance of brass fitting, strength, hardness and cutting, etc., in the copper - add a small amount of zinc alloy (usually 1% to 2%, the minority of 3% to 4%, and certain individuals of 5% to 6 %) tin, aluminum, manganese, iron, silicon, nickel, lead, elements of a ternary, four or even five yuan alloy, which is complicated brass, also known as special brass.
(1) Zn equivalent coefficient brass complex organizations, according to add elements of brass "zinc equivalent coefficient" to projections. Because in a small number of copper-zinc alloy joined other alloying elements, usually only the Cu-Zn state diagram in the α / (α + β) phase left or right movement. Therefore, the special brass, brass usually equivalent to the general increase or decrease in the zinc content of the organization. For example, in the Cu-Zn alloy by adding 1% after the silicon, which is equivalent to the Cu-Zn alloy 10 per cent increase in zinc alloy. So Silicon "zinc equivalent" to 10. Silicon "zinc equivalent coefficient of the" largest, Cu-Zn in the α / (α + β) phase boundary significant shift copper side, that is strongly reduced α phase. Nickel "zinc equivalent coefficient" is negative, that is, expansion of α-phase region.
(2) special brass in the performance of special brass α-and β-phase solid solution is diverse complex, the effect of strengthening its larger, and ordinary brass in the α and β phase is the simple solution of Cu-Zn, strengthening effect lower. Although zinc is equivalent multi-solid solution with the simple solution of the dual nature is not the same. Therefore, a small number of multi-alloy enhanced performance is to raise a way. brass fitting
(3) Several special deformation brass pressure on the organization and processing properties
Lead Brass: Brass do not dissolve in the actual lead, the state was free distribution of particles on the grain boundaries. Lead Brass α and their organizations (α + β) two. Α leaded brass because of the harmful effects of lead greater low temperature plastic, it can only cold deformation or hot extrusion. (Α + β) Lead Brass has good high temperature plastic, can be forged.
Tin brass: adding tin brass, and can significantly increase the heat-resistant alloys, especially to raise the capacity of seawater corrosion resistance, the tin brass "Navy brass," said.
Tin can into copper-based solid solution, from the solid solution strengthening effect. But with the increase of tin alloy appears in the brittleness of the r (CuZnSn compounds), to the detriment of alloy plastic deformation, the tin containing tin brass of the general 0.5% to 1.5% range.
Commonly used tin brass have HSn70-1, HSn62-1, HSn60-1. The former is α alloy, high plasticity, can be cold and hot pressure processing. After the two brands of alloy with (α + β), the two organizations, and often appeared with a small r, not high temperature plastic, the only state in the thermal deformation.
Brass Manganese: Manganese in solid brass in the greater solubility. Brass by adding 1% to 4% of the manganese, can significantly increase the strength and corrosion resistance of the alloy, without reducing its plasticity.
Manganese brass with (α + β), a commonly used HMn58-2, cold, hot under the pressure of processing performance is quite good.
Rail Brass: Brass Rail, Rail to iron-rich phases of particulate precipitation, as a nucleus and the grain refinement, and can stop recrystallization grain growth, thereby enhancing the mechanical properties of alloy technology and performance. Brass Rail in the iron content is usually at 1.5% below their organizations (α + β), a high strength and toughness, good high temperature plastic, may also cold deformation. Popular brands for Hfe59-1 - 1.
Nickel Brass: nickel and copper to form continuous solid solution, a significant expansion α phase. Brass adding nickel brass can be significantly enhanced in the atmosphere and seawater corrosion resistance. Brass Nickel also enhance the re-crystallization temperature, and to develop more small grains.
HNi65 nickel brass-5 with single phase α organizations, has good room temperature plastic, but also in the thermal deformation, but the lead content of impurities must be strictly controlled, and whether the system will be a serious deterioration alloy thermal processing performance.
China first began using brass Zhu Jian Ming Jiajingnianjian. "Brass" first appeared with respect to the Western Han Dongfang Shuo ((() Shen vary by Arakawa in the ":" Palace northwest, the brass wall, and that of the imperial palace to. "This" brass "refers to the copper alloy, Daikao." Xintangshu-food goods "are 'bronze," "Brass" description refers to the respective colors and smelting ore products, is not now the copper-tin alloy and copper Zinc alloy. consultative Hung Song Kui essays "Daye Fu," another "for its brass also, there is not a pit, hilly Public Park," referring to the refining fire of the copper. term Brass refers specifically copper-zinc alloy, began in the Ming Dynasty, and its records found "that will be Code": "Jiajing in the cases, Tongbao money 6000000, and that the sharing of the burden of two fire brass 47,272……. "Based on the analysis of the Ming Dynasty coins ingredients found" that will be Code, "said Zhu Jian real sense of the kind of brass than the emergence of several other copper alloy night many, it is because the brass was in the metal zinc comparison difficulties. zinc oxide in a 1000 ℃ 950 ℃ temperature can be quickly be restored as zinc, and in liquid zinc at 906 ℃ already boiling, so the reduction of zinc metal steam-existence. cooling in response to downturn Steam zinc furnace oxidation to carbon dioxide into zinc oxide, zinc metal to be the condensation must have a special device, which is the use of zinc metal than copper, lead, tin, iron use much later the reason for brass Coining one of the reasons why there late, but in Jiangzhai Yangshao culture sites have been unearthed in a zinc in excess of 20 per cent of the brass-and yellow brass, plastic County, Shandong Sanlihe Longshan Culture in the strata have unearthed two kind of brass cone. Clearly, the emergence of these artifacts brass is not to say that people in the hands of the brass prehistoric smelting technology, but people in the use of Cu-Zn mine at the symbiotic inadvertently obtained. Shang and Zhou dynasties Bronze the volume of zinc are low, usually in the 10 - z order of magnitude. Han dynasty, Xinmang money in the plate of individual Cu-Zn Gan money, and some of the content of zinc in the coin of 7 per cent, but this could not explain the brass and Zhu Jian arising from the Western Han Dynasty Xinmang time because these copper-zinc alloy is very isolated phenomenon, zinc and generally more of the true meaning of brass zinc 15% to 40% of a much smaller, so we think that these zinc is the coins in the Han Dynasty, "Hill Zhuqian that" the use of copper-zinc ore at the symbiotic. According to a survey of the mine found Shandong Changwei, Yantai, Linyi and Hubei, and other places have rich resources of copper Symbiosis zinc mine, which makes the smelting of copper containing a small portion of zinc. to the Tang Dynasty, Zhu Jian materials standardization, Suozhu trip to the coin of the content of zinc are constant.

Brass Neutral Links

One of the main industry sourceable item in electrical industry is brass neutral links. It is also called as brass terminals or inserts etc., Neutral link has rod or bar size in rectangular or square. It has wire holes at one end and other end threads for screws to tight copper wire. It has ranges from 3 holes to 144 holes or upto 1 metre of length.

Brass Components

Manufacturer and exporter of brass Electrical electronics ComponentsBrass Sanitary Plumbing hose pipe tube nipples union couplers FittingsBrass hex wind cap milled flare lock Nut split Bolt ScrewBrass Cable GlandsElectrical Wiring AccessoriesBrass battery Terminal ConnectorsBrass Anchors FastenersBrass Copper Alloy Ingots Rods BilletsPhenumatic precision turned PartsNon-ferrous metal brass copper zinc cable scraps Manufacturer Exporter of Components jamnagar india Brass hinges tower bolts Building Hardwarecable lugs inserts clamps socket switchgear plug pins earthing neutrallinks hrc fusebrass compression moulding lamp holder conduit fittingsDIN standard male female adaptors automobile energy meter components reducer coupler.

Copper : An Important Natural Resource

We're in no danger of running out of copper. Known worldwide resources of this important and valuable metal are estimated at nearly 5.8 trillion pounds of which only about 0.7 trillion (12%) have been mined throughout history.
And keep in mind, nearly all of that 0.7 trillion (or 700 billion) pounds is still in circulation because copper's recycling rate is higher than that of any other engineering metal.
Until well into the 1800s, most copper used in the U.S.A. had to be imported. Today, we are virtually self-sufficient and, worldwide, second only to Chile in production.
Each year in the U.S.A., nearly as much copper is recovered from recycled material as is derived from newly mined ore. Excluding wire production, most of which uses newly refined copper, more than three-fourths of the amount used by copper and brass mills, ingot makers, foundries, powder plants and other industries comes from recycled scrap.
Almost half of all recycled copper scrap is old post-consumer scrap, such as discarded electric cable, junked automobile radiators and air conditioners, or even ancient Egyptian plumbing. (Yes, it's been around that long.)
The remainder is new scrap, such as chips and turnings from screw machine production.

Plumbing

Since 1963 (the year CDA was established), more than 28 billion feet or about 5.3 million miles of copper plumbing tube has been installed in U.S. buildings. That's equivalent to a coil wrapping around the Earth more than 200 times. The current installation rate now exceeds a billion feet per year.
More than 9 out of 10 plumbers (94%) use copper tube in their own homes.

Electrical

Copper is the standard benchmark for electrical conductivity. It conducts electrical current better than any other metal except silver.
Copper is routinely refined to 99.98% purity (even more pure than Ivory Soap) before it is acceptable for many electrical applications.
Number 12 (AWG) copper wire is the most common size used for branch circuit wiring in buildings. The amount of copper products consumed in the U.S.A. this past year would make a size 12 wire that could encircle the Earth 2,630 times or make 140 round trips to the Moon.
CDA's Electrical Energy Efficiency program illustrates how a simple upsizing of copper conductors used for electrical distribution can earn significant paybacks to building owners, usually within one to two years or less.
Installing #10 AWG wire instead of #12 AWG for feeding a 15-amp lighting load running half time (4000 hours per year) pays back the difference for its higher cost in only 9 months, at $0.075 per kilowatt-hour (kWh).
Because half of all the electricity generated in the U.S. is consumed by motor-driven systems, the most significant energy savings are realized by upgrading systems with high-efficiency motors.
A high-efficiency 3-hp motor operating full time at $0.08 per kWh would repay its cost premium in less than 5 months, and from then on save money and electricity.
Premium motors are not only more efficient (mostly because they are made with more copper), they also last much longer and generate less heat.
Wherever electricity flows, connectors are required. Copper in its many varieties is the dominant and favored material whether conductors are used for high-current power distribution or "signal" level currents used for data and telecommunications.
Some high-power connectors weigh in at 20 pounds or more, while tiny electronic connectors may weigh as little as a few milligrams with spacing between pins less than half a millimeter. The United States is the world's leader in the multibillion-dollar connector industry.
A consortium assembled by the Copper Development Association is working on a project to develop die materials for use in casting copper motor rotors. Such rotors would dramatically increase motor efficiency. Commercialization of the process is expected in 2002.
Power quality problems that plague many modern offices and factories are largely preventable. Copper-intensive solutions include using larger neutral conductors to handle harmonic loads, better grounding systems to dissipate transients and lightning, and fewer outlets per circuit to lessen interaction between office equipment and computers.
Scores of lives and billions of dollars in property could be saved each year if buildings were properly protected against lightning. A single lighting strike at a commercial facility could cause thousands of dollars per hour in lost production.
Copper and its alloys are the most common and most effective materials used in lightning protection.
Nearly 50 tons of high conductivity, oxygen free copper wire was used to make 1,700 super conducting electromagnets for a collider at the Brookhaven National Laboratory in New York. The magnets are used in the 2.4-mile diameter underground collider to study subatomic particles.

Copper Facts

Production & Consumption
U.S. copper mine production in 2002 dropped to 2,516 million pounds from 2001's 2,954 million pounds.
The 2002 level of 7,313 million pounds is a 6.0% decrease from the revised 2001 level of 7,780 million pounds.
Exports of mill products in 2002 continued to decline also, down 7.1% at 735 million pounds versus imports of 909 million pounds, a decrease of 10.0% from 2001 levels.
Building construction continued to be the largest end-use market for copper products, accounting for more than two-fifths, 46.3% (3,384 million pounds), of total U.S. consumption. Other end-use markets:
Electrical and electronic products - 22.7%(1,662 million pounds)Transportation equipment - 10.2%(744 million pounds)Consumer and general products - 10.9%(798 million pounds)Industrial machinery and equipment - 9.9%(725 million pounds)
The most current annual market data figures may be found in the market data section.