What is the composition of brass?

63 percent copper and 37 percent zinc

The correct answer is option 1. 63 percent copper and 37 percent zinc.

The composition of brass is: 63 percent copper and 37 percent zinc.

Brass is an alloy composed primarily of copper (Cu) and zinc (Zn), with varying proportions of each metal depending on the desired properties of the alloy. The most common type of brass, known as alpha brass, typically contains approximately 63% copper and 37% zinc by weight. This composition provides a balance of strength, ductility, corrosion resistance, and machinability, making it suitable for a wide range of applications, including plumbing fixtures, musical instruments, decorative hardware, and electrical components. While other compositions of brass exist, such as those with higher zinc content (e.g., 60% copper, 40% zinc) or additional alloying elements (e.g., lead, tin, nickel), the 63/37 ratio is the most common and widely recognized for general-purpose brass alloys.