How much zinc is added to red copper to make brass

Brass is divided into ordinary brass and special brass according to the types of alloying elements contained in the brass. Brass for pressure working is called deformed brass. Brass A copper alloy with zinc as the principal additive element, having an attractive yellow color, commonly referred to as brass. Copper - zinc binary alloy is called ordinary brass or simple brass. Brass of more than three yuan is called special brass or complex brass. Brass alloys with less than 36% zinc consist of a solid solution and have good cold working properties, such as brass with 30% zinc is commonly used to make shell casings, commonly known as bullets

Shell brass or 733 brass. Brass alloys containing between 36 and 42% zinc are composed of and solid solutions, of which the most commonly used is hexagon brass containing 40% zinc. In order to improve the performance of common brass, other elements are often added, such as aluminum, nickel, manganese, tin, silicon, lead, etc. Aluminum can improve the strength, hardness and corrosion resistance of brass, but reduce the plasticity. It is suitable for sea liner condensation pipe and other corrosion resistance parts. Tin can improve the strength of brass and corrosion resistance to sea water, so it is called naval brass, used for ship thermal equipment and propellers. Lead can improve the cutting performance of brass; This easy - cutting brass is often used for clock parts. Brass castings are commonly used to make valves and pipe fittings.