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Aluminium, is a chemical element in the boron group with symbol Al and atomic number 13.
A 0474 (OTTO) Aluminium beads, 5-15 mm, 99.9%, 5-15 mm, 99.9% Cas 7429-90-5 - used non-ferrous metal. Aluminium is almost always alloyed, which markedly improves its mechanical properties, especially when tempered.