Square brass tubing is made from Alloy 272 or common brass, and it exhibits a yellow color. Its chemical composition is about 63% copper and 37% zinc. Of all the copper alloys, Alloy 272 has the highest machinability, meaning it can be easily shaped depending on its intended purpose. The material is also very resistant to corrosion.
These tubes are categorized by their nominal measurements, or the outside diameter. There are also varying thicknesses of the tube walls ranging from 0.02 inches to about 0.10 inches. Square brass tubing may be cut and used for fasteners in construction projects.