China 7A04 T6 Aircraft Aerospace Aviation Aluminum Alloy Sheet Plate Forgings

7A04 T6 Aircraft Aerospace Aviation Aluminum Alloy Sheet Plate Forgings
7A04 aluminum alloy sheet plate profile forgings is a heat treatment and strengthening alloy of Al-Zn-Mg-Cu system. Its strength is higher than that of hard aluminum. It is characterized by its yield strength close to tensile strength and plasticity, and its sensitivity to stress concentration is strong, especially when subjected to vibration load and repeated static load. Therefore, the design of parts, the manufacturing process and the assembly process need to strictly avoid the stress concentration and the formation of additional stress. The heat resistance of the alloy is poor, and it will soften rapidly when the temperature is higher than 125, and the stress corrosion resistance of thick and thick parts is poor in short and transverse.
The main stress parts of 7A04 alloy aluminum alloy sheet plate profile forgings is widely used in aircraft structures, such as beams and stringers, bulkheads, ribs, skin, joints, undercarriage parts etc.. It can produce all kinds of semi-finished products, such as plate, strip, section, bar, wall, pipe, wire, free forgings and die forgings.
Chemical composition of 7A04 alloyAlloySiFeCuMnMgCrNiZnTiZrOthersAlEachTotal7A040.500.501.4~2.00.20~0.601.8~2.80.15~0.25-5.0~7.0--0.050.15Remainder

AlloyAlloy seriesMean featuresσb Value/MPaWorking temperature/ºC7A04B95(Russia)The yield strength to tensile strength, low ductility, sensitivity to stress concentration effects, especially the repeated static load under vibration load and the situation is more obvious, therefore need to strictly avoid stress concentration factor and the formation of additional stress in parts of the design, manufacture and assembly process. The short transverse stress corrosion resistance of the thick and large parts of the alloy is poor. There are mainly plate and extrusion parts.
480~570<125
Physical Property of 7A04 Aluminum alloy sheet plate profile forgingsAlloyTypeTemperδ size/mmDirectionσb/MPaσp 0.2/MPaδ %Standard7A04
Aluminum
PlateT61.0~2.5LT4804107GJB 2053-1994>2.5LT4904207T92.0~4.0LT5204507T67.0~10.0L4904106GJB 2662-1996>10~25L4904104>25~40L4904103Extruded aluminum profileT67.0~10.0L4903707GJB 2054-1994>10~25L5304006Extruded aluminum profileT6≤10L5104606GJB 2057-1995>10~20L5304606>20~40L5604606>40L5704906Free forgingsT6Weight≤30KGL5104206GJB 2351-1995Weight>30KGL5104205Die forgingsT6Weight≤30KGL5304406Weight>30KGL4304406
AlloyTemperAircraft typeApplication parts and typical parts7A04Aluminum plate: T6,T9
Aluminum forgings:T6
Aluminum profile: T6Y8, Y12Skin, wall board, all kinds of beams (backlog, forgings), frame, fin, long truss, joint, landing gear and so on.