2XXX series aluminum alloys are aluminum alloys with copper as the main alloying element, which include Al-Cu-Mg alloys, Al--Mg-Fe-Ni alloys, and Al-Cu-Mn alloys, all of which belong to heat-treatable aluminum alloys. The alloys characterized by high strength and are usually called hard aluminum alloys, with good heat resistance and machinability, but their corrosion resistance is not as good as that of most other aluminumoys, and intergranular corrosion can occur under certain conditions. Our factory mainly produces 2XXX series aluminum alloys, including 2011, 201B, 2014, 2017, 2024, among which 2011 is an Al-Cu alloy containing lead, 2011B is a lead-free Al-Cu alloy, both of which are easy to machine; 2014, 2017, 024 are Al-Cu-Mg alloys. Currently available 2XXX series aluminum alloy grades: 2011 2011B (-free) 2014 2017 2024