Brass is an alloy of copper (Cu) and zinc (Zn), in proportions which can be varied to achieve varying mechanical, electrical, and chemical properties.[1] It is a substitutional alloy: atoms of the two constituents may replace each other within the same crystal structure.

Brass is similar to bronze, another alloy containing copper that uses tin instead of zinc.[2] Both bronze and brass also may include small proportions of a range of other elements including arsenic (As)lead (Pb)phosphorus (P)aluminium (Al)manganese (Mn), and silicon (Si). Historically, the distinction between the two alloys has been less consistent and clear,[3] and modern practice in museums and archaeology increasingly avoids both terms for historical objects in favor of the more general "copper alloy

Corrosion-resistant, highly formable, and non-magnetic. These make it a common choice for electrical conductivity and technical applications.

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