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.
Answer: Brass is an alloy made primarily of copper, usually with zinc. Alloys in general may be solid solutions or they simply be mixtures. Whether brass or another alloy is a mixture depends on the size and homogeneity of the crystals in the solid. Usually you can think of brass as a solid solution consisting of zinc and other metals (solutes) dissolved in copper (solvent).