Aluminum is not a preferred cannon making material. It would be possible to use but it will eventually fail. If used, the number of shots fired and their relative power should be recorded and after reaching a certain level, the barrel should be destroyed. The reason for this procedure is that the fatigue curve for aluminum never flattens out the way the curve for steel does. Consequently most small cannon are made from steel which gives essentially unlimited life and greater safety.
Also, an aluminum barrel would have to be disproportionately large for a given bore which would make it look strange.
