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Four different types of brass are
Copper zinc brasses contain a mixture of copper (Cu) and zinc (Zn). Tin brasses are made from copper (Cu), zinc (Zn) and tin (Sn). Leaded brasses are comprised of copper (Cu), zinc (Zn) and lead (Pb). Further types of brasses include alpha brass, beta brass and alpha-beta brass.
There are over 60 types of brass, the most basic categorisation can be considered to group all brasses into three main families, copper zinc brasses (Cu-Zn), Leaded brasses (Cu, Zn, Pb) and tin brasses (Cu, Zn, Sn) these can then be further sub-divided by their more specific properties and uses.Brass is an alloy of copper and zinc; the amount of zinc present is the main factor affecting types, or grades, of brass. The use of brass is well documented as far back as the 3rd millennium BCE around the Aegean, Iraq, Georgia and Turkmenistan areas although there have been some isolated finds in China dating back to the 5th millennium BCE. The Roman empire used brass for their coins, and it even gets a mention in the King James' Bible and in some of the works of Shakespeare.
Brass has a very decorative, bright golden lustre; combined with its high workability and durability, it provides a perfect solution for the manufacture of hard wearing components that also may need to be aesthetically pleasing. It is used to make musical instruments, machined parts, boiler parts, fireboxes, ornamental castings, shop fittings, extruded sections, architectural extrusions, fasteners, window frames, stamped components, blanked plates, heat exchangers and general copper-smithing applications. Brass does not 'spark' when it is struck, which makes it suitable for use in hazardous or potentially combustible environments.
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