Aluminum is used for several reasons. The first is that it is non-magnetic. This keeps it from messing with the cartridge. Aluminum is also relatively cheap, as it is one of the most abundant metals. Its also easy to machine.
An aluminum platter should be damped in some fashion for best results. If this is done it will keep up with any other material with no worries.
An aluminum platter should be damped in some fashion for best results. If this is done it will keep up with any other material with no worries.