2024-T351 alloy 
 2024 aluminum - copper - typical of the hard lines of magnesium alloy, its composition is more reasonable, better overall performance. Many countries are producing the alloy, is the largest amount of hard aluminum. The alloy is characterized by: high strength, a certain degree of heat resistance, can be used as 150 ° C below the working parts. Temperature higher than 125 ° C, 2024 alloy strength is higher than the 7075 alloy. Thermal state, annealing and forming the new state quenching better than the performance, heat treatment significantly enhanced the effect, but the heat treatment process demanding. Corrosion resistance is poor, but coated with aluminum can be effectively protected; welding easy to crack, but with a special welding process can also be riveted. Widely used in aircraft structures, rivets, card wheel hub, the propeller components and various other structural parts. 
 The chemical composition of aluminum alloy 2024 
 Si Si Fe Cu Fe Cu Mn Mg Mn Mg Cr Zn Ti Cr Zn Ti Al other elements 
 Each Total 
 0.5 0.5 3.80-4.90 0.30-0.90 1.20-1.80 0.10 0.25 0.15 0.05 


 2024 alloy mechanical and physical properties 
 Tensile strength MPa 470 
 0.2% Yield Strength MPa 325 
 Elongation% 10 
 Fatigue 105 
 Hardness HB 120 Conductivity 20 ° C 30 
 20 ° C resistivity n. M 48 
 Modulus 68 
 Density KG.m-3 2770