The words âat least 17 years of age and *â*â* under 45 years of ageâ are substituted for the words âwho shall be more than seventeen years of age and *â*â* not more than forty-five years of ageâ.
Steel is cheaper, and brass is more expensive, and not much of a structural material. Brass is a tensile metal, and has a great ability to bend. It is used to make bearings, valves and moving parts, because it does not break easily. Steel, on the contrary, is difficult to cast, and quite difficult to work with in small machines.
Share. Brass is any alloy consisting primarily of copper, usually with zinc. In some cases, copper with tin is considered a type of brass, although this metal historically has been called bronze. This is a list of common brass alloys, their chemical compositions and the uses of the different types of brass.By Anne Marie Helmenstine, Ph.D.n some cases, copper with tin is considered a type of brass, although this metal historically has been called bronze. This is a list of common brass alloys, their chemical compositions and the uses of the different types of brass. By Anne Marie Helmenstine, Ph.D.