China 7b04 T73 Aircraft Aerospace Aluminum Structural Shapes for Aviation

7B04 T73 Aircraft Aerospace Aluminum Structural Shapes for Aviation
7A04 Aluminum alloy sheet plate profile 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.
Chemical Composition of 7A04 AlloyAlloySiFeCuMnMgCrNiZnTiZrOthersAlEachTotal7B040.100.251.4~2.00.20~0.601.8~2.80.15~0.25-5.0~6.5--0.050.15Remainder
7B04 aluminum alloy sheet profile forgings
7B04 alloy is further purified and developed on the basis of long term use of 7A04 alloy. That is to improve its fracture toughness properties by controlling Fe and Si impurity elements. 7B04 alloy has been used in T6 state for a long time, and its strength is high. The characteristic is that the yield strength is close to the mild tensile, low plasticity and poor stress corrosion resistance.
7B04 aluminum alloy sheet profile forgings is a relatively mature high purity aluminum alloy in China. It is a large aluminum alloy used on military aircraft in China. Parts of the machine account for 60% of the total aluminum alloy consumption, and the consumption of the single machine is about 20t, which achieves stable batch supply. Varieties include plates, thick plates, profiles, extruded panels, bars and forgings. The successful application of 7B04 alloy to military aircraft provides valuable experience for the promotion of domestic new materials in military and civil aircraft.
AlloyAlloy SeriesMain Featuresσb Value/MPaWorking Temperature/ºC7B04B95(Russia)The fracture toughness of 7A04 alloy is higher than that of 7A04 alloy by 10%~15%. The main varieties are sheet, profile, extruded wall plate and bar, forgings and so on. There are three kinds of T6, T73 and T74 in use. The ingot of this alloy is more difficult than 7A04 alloy. It is suitable for hot forming, such as rolling, extrusion, forging and so on. It can make all kinds of parts of size and shape.
440~590<125
Mechanical properties of 7B04 aluminum alloyAlloyTypeTemperδ Size/mmσb/MPaσp 0.2/MPaδ %KIC or KCStandard7B04
Aluminum sheetT60.5~1.94804007-11-CL-027B>1.9~6.04904107>6.0~10.54904106T740.5~1.9450~530380~4708>1.9~4.5460~540380~4708>4.5~6.0480~560400~4908>6.0~10.5470~550390~4808T730.5~1.9430~530345~4208>1.9~4.5440~510355~4308>4.5~10.5450~520375~45080-T60.5~1.04703907>1.0~6.04804006>6.0~10.54804006Aluminum Skin plateT6B0.5~1.94804007-11-CL-026B>1.9~6.04904007>6.0~10.54904106T74B0.5~1.9450~530380~4608>1.9~4.5460~540380~4608>4.5~6.0480~560400~4808>6.0~10.5470~550390~4708T73B0.5~1.9430~550345~4208>1.9~6.0440~510355~4308>6.0~10.5450~520375~4508T62B0.5~1.94703907>1.9~6.04804007>6.0~10.54804006pre-stretching aluminum plateT65111~255304607-CL-029BSWA/S1201-200226~50530460651~60520440561~804904204T745111~50490~560420~500751~60470~540380~460661~85460~530365~4406T735111~50470~540400~480751~60450~520365~440661~85440~510345~4206Extruded Aluminum bar rodH112--T610~28560480611-CL-031B>28~1505704906>150~2505604906>250~3005504806T610~505604806>50~1005704906Extruded aluminum profileH112--T6≤5510460 11-CL-028B>5~10520470 >10~75540480 >75~112540470 >112~125520450 O--T6≤5510460 >5~10520470 >10~75540480 >75~112540470 >112~125520450 T6≤5510460 >5~10530480 >10~75550490 >75~112550480 >112~125530460 T74≤75510~590450~530 >75~125490~590420~530 T73≤5460~530390~460 >5~40480~550420~490 >40~75470~540400~470 >75~125460~530390~460 Extruded wallboardT6AllL:540490711-CL-030BLT:510-6T742All500~570430~5008Die forgingsT6≤75L:5104306L-T: 31.0
T-L: 21.7
S-L:18.6 LT:450-4ST:410-3>75~150L:5104306LT:450-4ST:410-2Free forgingsT6≤75L:4904106-LT:440-3ST:390-2>75~150L:4904105LT:440-3ST:390-2Die forgingsT74≤75L:490~580430~5206 LT:460~540410~4904ST:450~520400~4702>75~100L:480~570420~5106LT:460~540410~4904ST:450~520390~4702Free forgingsT74≤75L:480~570410~4906 LT:460~540400~4804ST:450~520390~4702>75~100L:470~560400~4806LT:460~540390~4704ST:440~520390~4702>100~125L:450~540390~4706LT:440~520370~4503ST:420~500380~4602Die forgingsT73≤75L:450~540380~4707L-T: 35.7
T-L: 26.4
S-L:21.7LT:440~520370~4505ST:420~500-3>75~100L:440~530370~4607
AlloyTemperAircraft ModelsApplication parts and typical parts7B04Aluminum sheet: T6,T74,T73,T6B,T74B,T73B,T62B.
Aluminum plate:T651,T7451,T7351
Aluminum profile: T6,T74,T73,T6,T742
Aluminum forgings:T6,T74,T73Y8, Y12Skin, wall board, all kinds of beams (backlog, forgings), frame, fin, long truss, joint, landing gear and so on.