How do alloys brass and bronze differ in composition?

Brass and bronze are both metal alloys, but they differ in composition and properties:

Brass:

Brass is primarily composed of copper (Cu) and zinc (Zn).
The proportion of copper to zinc varies, but typically brass contains around 60-80% copper and 20-40% zinc.
Sometimes other elements like lead, aluminum, or tin are added to improve specific properties.
Brass is known for its bright gold-like appearance, making it popular for decorative applications.
It's valued for its relatively low melting point and malleability, making it suitable for a wide range of applications including musical instruments, decorative hardware, and plumbing fittings.
Bronze:

Bronze is primarily composed of copper (Cu) and tin (Sn).
The proportion of copper to tin can vary widely, but bronze typically contains around 80-90% copper and 10-20% tin.
Like brass, bronze can also contain other elements such as aluminum, silicon, or phosphorus, depending on the desired properties.
Bronze is typically harder and more durable than brass, making it suitable for applications where strength and corrosion resistance are important.
It has been historically used for casting sculptures, making tools and weapons, and manufacturing bearings and bushings due to its wear resistance.
In summary, while both brass and bronze are copper-based alloys, their compositions and properties differ primarily due to the different alloying elements used (zinc for brass, tin for bronze) and their respective proportions.