No not really. Aluminum is very very low on the moh hardness scale. Around 2.5 out of 10. Its actually a very poor material for phones in general. Sucks for reception, dents extremely easily, and scratches easily.
Aluminum is 2.5-3 out of 10.
Plastic is 1 out of 10.
http://www.jewelry-secrets.com/Other/Whats-The-Mohs-Scale-Of-Hardness/The-Mohs-Scale.html