The melting point of pure aluminium is 660 ☌. The actual melting point of aluminium depends on the respective composition of the alloy from which the aluminium tube was manufactured. The aluminium that is used in the manufacture of tubes and sections, which are then bent using tube bending or roll bending, is referred to as a metal alloy, since it is obtained by melting various metal(loid)s together in varying proportions for casting: This works to prevent oxygen coming into contact with the aluminium underneath the oxide layer, giving it excellent protection against corrosion. The silvery colour of the aluminium tube can be attributed to the oxide layer that forms on the surface when it comes into contact with air. Aluminium is a ductile, silvery metal that is usually harvested from bauxite ore.
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