Control sequence in precipitation hardening well for accurate of result and
in terms of manufacturing process prior is aluminum alloy 6xxx can be improved mechanical properties by thermal process and making artificial aging.
After age hardening, aluminum alloy 6xxx has high hardness and good corrosion resistance and has mechanical properties as aluminum- cupper. So, it is proper prior process.
Aluminum alloy 6xxx is used in sheet products, usually are used extensively in commercial and military aircraft for fuselage skins, wing skins and engine areas where elevated temperatures.