01-17-2018, 01:37 AM
Hot rolled aluminium plate is austenised due to the heat. The material is work hardened but at the same time the internal stresses are relaxed to some degree by the higher temperature of processing causing recrystallization. On the other hand, cold rolled materials are purely work hardened and grains are deformed in the direction of rolling. In the end, depending on process parameters, with both methods you have a metal that will often be stronger and less ductile than the starting material, but cold rolled aluminium plate will be stronger and less ductile still than the hot rolled aluminium plate (and will have slightly anisotropic mechanical properties).