What is the copper content percentage in red brass, an alloy of copper?

Red brass is an alloy primarily composed of copper, with a notable addition of zinc and smaller amounts of other elements such as lead, tin, and iron. The typical copper content in red brass is around 85%. This composition is essential because it provides the alloy with favorable properties, such as good corrosion resistance, malleability, and the ability to be shaped easily without cracking, which are valuable characteristics for various plumbing and fitting applications.

The other percentages listed fall outside the typical composition of red brass. For instance, a copper content of 75% would classify the material closer to yellow brass, while a composition of 90% or 95% would create a metal that is primarily copper rather than maintaining the distinctive properties of red brass. Thus, the answer accurately reflects the commonly accepted standard for the copper content in red brass.