2124 aluminum - copper - magnesium lines typical of the hard alloy, its composition is more fair, comprehensive function better. Many countries have produced this alloy, aluminum hard top is the largest amount. The alloy is characterized by: high strength, a certain degree of heat resistance, can be used as 150 ° C below the working parts. Temperatures above 125 ° C, the strength of 2024 alloy is higher than the 7075 alloy. Thermal state, annealing and quenching conditions forming the new performance is better than the heat treatment to strengthen the effect is obvious, but the heat treatment process demanding. Corrosion resistance is poor, but with aluminum coating can be effectively protected; easy to crack when welding, but can be welded using a special process can also be riveting. Widely used in aircraft structures, rivets, card wheel hub, propeller components and various other structures. 2124 chemical composition: Si, Cu, Mg, Zn, Mn titanium chrome aluminum 0.5 3.8-4.9 1.2-1.8 0.3-0.9 0.25 0.15 0.1 0.5 margin 2124 aluminum with aluminum-related technical standards with national standards (GB / T 3880-2006), apply to aluminum strip material of uniform standards. 2124 aluminum corresponding grades GB: 2A12 (LY12) GB / T 3190-1996 ISO: AlCu4Mg1 ISO 209.1-1989 Japanese standard: A2024 JIS H4000-1999 JIS H4040-1999 non-standard: 24530 IS5902 French standard: 2024 (A-USG1) NF A50-411 NF A50-451 American Standard: 2024 AA 2024 aluminum hardness 2017A-H112 hardness: about HB85 2017A-T4 hardness: HB120 ~ 145 2017A-T351 hardness: HB120 ~ 145 2017A-0 hardness: HB40 about 5052 Aluminum