... advantages of this aluminium box are higher strength due to cold working, closer tolerances, and good surface finish. The advantages ... if the material is subject to . Materials that are commonly cold extruded include:lead, tin,aluminum, copper, zirconium, titanium, molybdenum, beryllium, ... are the most commonly extruded material. Aluminum box can be hot or cold extruded. If it is hot extruded it is heated to ...