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.
Brass Vs Bronze. Copper is a common type of earth metal. It has many industrial uses worldwide. Now, when copper is combined with other metals the end result is an alloy. Both bronze and brass are examples of copper alloys. They too play very important roles industrially. The primary difference between the two is that brass is made out of copperâs combination with zinc while bronze is literally copper plus tin. As mentioned, copper is now popularly used in many industries but for it to become more useful, it needs to be combined first with other more stable metals.