What kind of brass in what form? The density of the aluminum also matters, so it could scratch if both materials were slightly thick. The aluminum would have to be a little flimsier than the brass.
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becasue the alluminum is denser than the copper.
It cost more energy, time, money and produces more negative effects to the environment to recycle than to make items from scratch. Aluminum is the only useful recycling.
Manganese, aluminum, silicon, phosphorous, steel and brass make up a very small portion of alloys. For a more complete list, refer to the "related links".
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brass per Kg