The main alloying component of copper alloy is zinc, also known as zinc brass. Brass is used for decorative purposes because of its golden appearance. It can also be used where low friction is required, including gears, locks, bearings and valves. Brass fits the zipper. What's more, brass is widely used in musical instruments, such as bells and trumpets, which require good workability and durability.
Advantage
Brass is easily recycled.
Brass is easy to work with.
Brass is great for decoration.
Brass conducts electricity and heat very well.
Brass is more malleable than bronze.
shortcoming
Brass requires a lot of maintenance as it tends to darken easily.
Brass can be affected by stress corrosion cracking, especially when it is exposed to ammonia.
Bronze - tinned copper alloy
Bronze comes in many alloys such as 90-10 bronze and phosphor bronze.
Bronze is an alloy consisting primarily of copper, about 12-12.5% tin and other metals such as nickel, zinc, aluminum or manganese, and sometimes nonmetals such as silicon, phosphorus or arsenic, making bronze harder and ductile than copper, stiffness and machinability. Bronze has long been used in coinage and is particularly suitable for ships and ship fittings because of its toughness and resistance to seawater corrosion.
