2024 
 2024 general plate standard AMS-QQ-A-250/4 (non-clad aluminum); AMS-QQ-A-250/5 (clad aluminum), and 2024 of the alloying elements copper, known as the hard aluminum, with a very high strength and good cutting performance, but poor corrosion resistance. Widely used in aircraft structures (skin, skeleton, ribbed, bulkheads, etc.), rivets, missile components, the card wheel hub, propeller components, and various other structures for the Al-Cu-Mg system. 
 2024 Chemical composition 
 Silicon 0.5% 
 Iron 0.5% 
 Copper 3.8-4.9 
 Manganese 0.0-0.9 
 Magnesium 1.2-1.8 
 Chromium 0.10 
 Nickel 
 Zinc 0.25 
 Titanium 0.15 (5) 
 Other (3) 0.15 
 Aluminum (4) The remaining 

 2024 performance 
 2024 for a typical hard aluminum alloy in the Al - Cu - Mg, its composition is more reasonable and better overall performance. Many countries are producing this alloy, is the largest amount of hard aluminum. The alloy is characterized by: high strength, heat resistance, can be used as the working parts below 150 ° C. Temperature higher than 125 ° C, the strength of 2024 alloy is higher than the 7075 alloy. Forming performance under thermal conditions, annealing and quenching state is better than the heat treatment to strengthen the effect is remarkable, but the heat treatment process is demanding. The poor corrosion resistance, but with aluminum coating can be effectively protected; welding cracks easily, but using a special process welding, can also be riveting. Widely used in aircraft structures, rivets, card wheel hub, propeller components and various other structural parts. 
 2024 purposes 
 2024 aluminum alloy with high strength and good fatigue strength, widely used in aircraft structures (skin, skeleton, ribbed, bulkheads, etc.), rivets, missile structure, propeller components and other various structures. 
 2024 aluminum alloy, the density of 2.73 g/cm3, (0.098 lb/in3). 
 2024 mechanical performance 
 Tensile strength σb (MPa)) ≥ 425 
 Conditions yield the the strength σ0.2 (MPa)) ≥ 275 
 Sample size: all wall thickness 
 Note: The tubes at room temperature longitudinal mechanical properties 
 2024 heat treatment process 
 Forming properties of the state, annealing and quenching state are better heat treatment to strengthen the effect is remarkable, but the heat treatment process demanding. The poor corrosion resistance, but with aluminum coating can be effectively protected; welding cracks easily, but using a special process welding, can also be riveting. 

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