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Brass Mechanical Properties
Feb 01, 2018

Brass mechanical properties

Due to the different zinc content of brass, mechanical properties are not the same, Figure 7 is yellow

brass

brass

Copper mechanical properties vary with the zinc content of the curve. For α-brass, both σb and δ increase with increasing zinc content. For (α + β) brass, room temperature strength is continuously increased until the zinc content is increased to about 45%. If the amount of zinc is further increased, the intensity suddenly drops due to the more brittle r phase (Cu5Zn8 compound-based solid solution) in the alloy structure. Room temperature plasticity of (α + β) brass always decreases with increasing zinc content. Therefore, more than 45% zinc content of copper and zinc alloy no practical value.

The use of ordinary brass is very wide, such as water tank, for drains, medals, bellows, serpentine tubes, condensers, shells and various shapes of complex red products, hardware and so on. With the increase of zinc content from H63 to H59, they are well able to withstand hot processing, and are used in various parts of machinery and appliances, stamping parts and musical instruments.

In order to improve the brass corrosion resistance, strength, hardness and machinability, etc., in the copper - zinc alloy by adding a small amount (usually 1% to 2%, a few of 3% to 4%, a very few of 5% to 6 %) Tin, aluminum, manganese, iron, silicon, nickel, lead and other elements, constitute ternary, quaternary, or even five yuan alloy, which is a complex brass, also known as special brass.


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