What are the useful properties of brass?

Answer 1

Physical properties: its density is 8.36 9/cm3, its meltiong point is 865 Celsius

Chemical properties:Brass is a metal, obviously. It can form ionic compounds with nonmetals and other anions under the right conditions. It's an alloy of zinc, a fairly reactive metal, and Copper, a fairly unreactive metal, and sometimes small amounts of other metals - the exact mixture can have a major effect on which metal's properties are seen, and to what extent.

The copper constituent is not very reactive, but will form copper oxide (flaky, green or black) given oxygen and enough time or heat - usually this is limited to a thin surface layer. Copper will not react with acids.

Zinc is more reactive and susceptible to corrosion than copper - if conditions are right it may lead to selective corrosion, where the zinc forms compounds and leaves behind spongy copper metal. It will react with acids.

Ammonia is a particular problem for copper alloys - it forms a water soluble ion with copper which may cause serious stress cracking.

Answer 2

i would say that the properties of brass are simple yet complex. it can be a mix of things such as color: its yellowy color which is created by the amount of zinc in the mix, but also its conductivity and ability not to corrode. but for a proper answer you may want to ask someone with large amount of knowledge of these thing. experienced i am not, so ask someone else.

Answer 3

Properties Of BrassBrass is one of the most commonly used metals today. Brass is a deriveative of copper when zinc is the primary alloying ingredient, besides copper.

Brasses may also have a small amount of other alloying elements in order to give it different advantageous properties.

Brass has excellent electrical conductivity and a high tensile strength. It rewards one with a brilliant shine when polished and there are as many types of brass as there are applications for it.

Brasses are suitable for fabrication via hot forging methods.The free machining grades set the bar for free machining, against which other metals are compared.

There are two classes of brass alloys:

1. The alpha alloys - These are the brasses with less than 37 % zinc.
2. The alpha/beta alloys These have between 37 - 45 % zinc.

The alpha alloys are ductile and therefore excellent for cold working. The alpha/beta or duplex alloys are limited in their cold ductility but are stronger and harder.

Brass CZ121 PropertiesMinimum PropertiesUltimate Tensile Strength, (MPa)410Proof Stress,0.2% (MPa)Elongation A5(%)20HardnessVPNChemistryCopper (Cu)58%Iron (Fe)-Manganese (Mn)-Nickel (Ni)-Lead (Pb)3% maxZinc (Zn)BalancePhysical PropertiesDensity8.47g cm3Melting Point875 degModulus of Elasticity97 gpaElectrical Resistivity0.062x10-6 ?.mThermal Conductivity123 W/m.K at 100°CThermal Expansion20.9 x10-6 /K at 100°CBrass alloy CZ121corresponds to the following designations:CENCW614NBSBS2874CZ121UNSC38500ISOCuZn39Pb3

This is a good machining grade as it falls into the CZ121 class. The added element of lead improves its machinability. The lead does not dissolve in the brass and the tiny particles act as chip breakers. Sometimes the letter "M" is added to the designation CZ121"M", this referrs to its good machining qualities.

• Corrosion resistance is fair to excellent
• Cold working is not recommended. This alloy can be knurled if need be.
• Hot working of CZ121 is excellent. This is best done between the temperature of 630 deg and 730 deg.
• Annealing or solution treatment can be carried out by quick cooling after heating to between 430 deg and 600 deg Celsius.
• Machinability is excellent. Its machinability rating is 90. As a comparison the Alloy 360 FC Brass is 100
• Welding - Brazing is rated as good and soldering as excellent. Welding is fair, however all other welding methods are not recommended.

Answer 4

Brass, an alloy of copper and zinc, has been used since antiquity. It is fairly easy to work, which is why this copper alloy is used to construct Musical Instruments. It's also a great choice for bushings, valves, zippers and locking mechanisms because it presents less friction than many other metals or metal alloys. We also know that brass is non-sparking, and that makes it a good choice for tools and other things used around places where sparks may start a fire or make something go boom. Brass can be machined relatively easily, and its moderate melting temperature allows it to be cast without a lot of fuss. Brass resists corrosion quite well, and has a variety of marine applications. Lastly, brass comes in a broad range of alloys that give it a wide range of properties in addition to those given here.