Metals: yellow brass vs red brass

Self-tutoring about metals: the tutor looks at brass.

Apparently, red brass is around 88% copper, then 8 to 10% zinc, and 2 to 4% tin. On the other hand, yellow brass is 60 to 70% copper, the rest zinc, with possibly lead and tin in small amounts.[1]

[1] Robin. “Red Brass vs Yellow Brass: What are the Differences?” rocheindustry.com [Online]. Available at: rocheindustry.com (accessed April 6, 2021).