China 7049 7050 7055 Aircraft Aerospace Extruded Aluminum Profiles for Aviation

7049/7050/7055 Aircraft Aerospace Extruded Aluminum Profiles for Aviation
7049 aluminum alloy plate profile forgings
Chemical Composition of 7049 alloyAlloySiFeCuMnMgCrNiZnTiZr OthersAlEachTotal70490.25 0.351.2~1.90.202.0~2.90.10~0.22~7.2~8.20.10~0.050.15Remainder On the basis of 7001 alloy, the contents of alloying elements Cu and Cr are reduced, the ratio of Zn/Mg is increased, and the impurity content of Fe and Si is reduced. It is also used to produce forgings and backfill parts of T73 state, and also to produce thick plates and sheets. The crack growth rate of stress corrosion cracking is much lower than that of 7075 T651 at the same time that the strength is not less than 7075 T6 alloy. The 7049 aluminum alloy forgings profile sheet alloy is mainly used in aircraft main landing gear, missile parts

AlloyAlloy series00Main featuresσb Value/MPaWorking Temperature/ºC70497049 series(Europe)On the basis of 7001 alloy, the contents of alloying elements Cu and Cr are reduced, the ratio of Zn/Mg is increased, and the impurity content of Fe and Si is reduced. It is also used to produce forgings and backfill parts of T73 state, and also to produce thick plates and sheets. The crack growth rate of stress corrosion cracking is much lower than that of 7075 T651 at the same time that the strength is not less than 7075 T6 alloy.
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AlloyMain featuresTypes: TemperApplication parts and typical parts7049In place of 7079 alloy, the strength and resistance to SCC are good and the resistance to ordinary corrosion is not strong.Extruded aluminum profile:T73511,T76511
Aluminum forgings: T73,T7352
Aluminum sheet and plate:T73Aircraft main landing gear, missile accessories.
7050 aluminum alloy plate profile forgings
7050 Alloy increased the content of zinc and copper, increased the ratio of zinc to magnesium, and replaced chromium with zirconium as a grain refiner, and greatly reduced the content of iron and silicon. These improvements and over aging treatment make the 7050 type alloys have good comprehensive properties such as good toughness, high fatigue strength and good corrosion resistance at high strength level. Another outstanding advantage of type 7050 Alloy is good hardenability, especially for the manufacture of heavy section parts such as forgings.
The 7050 aluminum alloy plate profile forgings is mainly used for aircraft structure parts, such as fuselage frames, partitions, wing panels, wing beams, wing ribs, landing gear support parts and rivets, which require high light, high stress corrosion and peeling corrosion resistance and good fracture toughness. When the temperature rises, the strength of the alloy will be reduced, and the long-term use temperature can not exceed 125ºC.
The force components of different state materials were used for different use conditions: T76 State General requirements for the structure exfoliation corrosion resistance and high strength; T74 state for high strength and anti stress corrosion structure, especially the structure of a thick section; the T73 state is mainly used for rivet wire of high strength, corrosion resistance.

Chemical Composition of 7050 AlloyAlloySiFeCuMnMgCrNiZnTiZr OthersAlEachTotal70500.12 0.152.0~2.60.11.9~2.60.04~5.7~6.70.060.08~0.150.050.15Remainder 7050 aluminum alloy plate profile forgings has good comprehensive performance, the main supply state is T7651 thick plate, T7451 thick plate and T7452 forgings. Because of the 7050 Alloy state variety, application technology is mature, so it is widely used in the manufacture of the fuselage frame and bulkhead, wing skin, extrusion reinforcing rod, stringers and ribs, forging parts, gear supporting components, such as rivets, 7050 aluminum alloy plate profile forgings is currently the most widely used of the 7 series alloy.

AlloyAlloy seriesMain featuresΣb Value/MPaWorking temperatue/ºC70507050 series 7050, it is one of the most widely used and comprehensive high strength aluminum alloys. It has high strength, high resistance to stress corrosion cracking and good fracture toughness. The main varieties are thick plates, profiles and forgings. The 7050 thick plate has two kinds of use state T7651 and T7451. T7651 has good anti peeling corrosion performance and medium stress corrosion resistance, and has high static strength. T7451 has the best anti stripping corrosion ability, and the ability to resist stress corrosion is also better than T7651, but the strength is slightly lower. At present, the short transverse properties of the 7050 Alloy thick plate have been further improved.
495~530
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Physical Properties of 7050 AlloyAlloyTypeTemperspecifications/mmDirectionσb/MPaσp 0.2/MPaABAB7050Aluminum sheetT7451δ6.35~38.1L217.6524.4448.5462.3LT510.6524.4441.6455.4δ38.125~76.2L510.6524.4448.5455.4LT517.5524.4441.6455.4δ76.225~101.6L510.6517.5448.5455.4LT510.6517.5441.6455.4ST469.2496.8407.1414.0δ101.625~127L496.8503.7427.8448.5LT496.8510.6420.9441.6ST462.3476.1400.2414.0δ127.025~152.4L489.9496.8414.0434.7LT483.0503.7414.0427.8ST455.4476.1393.3393.3T7651δ25.425~38.1L531.3552.0462.3489.9LT524.4545.1455.4483.0δ38.125~50.8L524.4538.2455.4483.0LT517.5538.2448.5476.1ST496.8517.5407.1434.7δ50.825~63.5L517.5538.2455.4483.0LT517.5538.2448.5476.1ST483.0503.7414.0427.8Aluminum profileT76511δ≤12.675L531.3545.1469.2489.9LT524.4538.2462.3476.1Free aluminum forgingsT7452δ152.425~177.8L469.2489.9386.4420.9LT462.3483386.4407.1ST448.5476.1358.8386.4
AlloyTemperAircraft modelsApplication parts and typical parts7050Aluminum plate: T7651,T7451
Aluminum profile: T76511
Free aluminum forgings:7452

Widely used abroad, domestic ARJ21 and so on
For thick section of main structure of high load, such as the manufacture of fuselage frame and bulkhead, wing skin stiffener, extrusion, Stringer, reinforcing rib, forging parts, gear parts, supporting beam, wall, flange, important joints etc..
7055 Aluminum alloy sheet profile
The 7055 alloy semi-finished products are used in the T77 state, which is used to make parts of the aircraft bearing structure in the near future. 7055 the super strength aluminum alloy is the alloy with the highest total strength at present, and the fracture toughness is better, and the fatigue crack propagation ability is strong. The microstructure of 7055 alloy has resistance to intergranular fracture and corrosion, and the microstructure of the alloy hinders the strong motion of dislocation.
7055 Aluminum alloy sheet profile is the most widely used aluminum alloy, which has the highest alloying degree and the highest strength. The LT tensile strength of 7055-T7751 pre stretched thick plate is above 660MPa, the corrosion level is EB, the tensile and compressive strength is 10% higher than that of 7150 T77, the corrosion resistance is between 7150 T6 and 7150 T77, and the fracture toughness is higher than that of the 7150 alloy with the same variety. 7055, T77, which is processed into T7751 thick plate and T77511 extruded parts, is applied to various occasions that require high compressive strength and good corrosion resistance, such as the upper wing structure, horizontal tail, joist beam, seat rail and freight slide.

Chemical Composition of 7050 AlloySiFeCuMnMgCrNiZnTiZr OthersAlEachTotal70550.100.152.0~2.60.051.8~2.30.04~7.6~8.40.060.05~0.250.050.15Remainder The together use of 7055 and 7150 alloys has achieved good results in large military transport, Boeing 777, and the fourth generation of fighters.
AlloyAlloy SeriesMain Featuresσb Value/MPaWork Temperature/ºC70557050 seriesThe 7055 Aluminum alloy sheet profile is the 7 * * * * system aluminum alloy with the highest alloying degree at present. The main types are T7751 thick plate and T77511 extrusion parts. Compared with the 7150 alloy, it improves the tensile and compressive strength while maintaining some important properties, such as fracture toughness, corrosion resistance and so on.643~669
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Physical Properties of 7050 AlloyAlloyTypeTemperSize/mmDirectionσb/MPaσp 0.2/MPaABAB7055Aluminum sheetT7751δ12.7~38.1L614.1627.9593.4607.2LT614.1627.9586.5600.3Aluminum profile
T74511 δ≤6.325L572.7579.6524.4538.2LT538.2545.1496.8510.6δ6.35~12.675L579.6586.5531.3545.1LT545.1552.0503.7517.5δ12.7~76.2L586.5600.3538.2552.0LT552.0565.8510.6524.4T76511 δ≤6.325L614.1627.9586.5600.3LT572.7586.5545.1558.9δ6.35~12.675L621.0648.6586.5627.9LT579.6600.3545.1586.5T77511δ12.7~38.1L648.6655.5621.0641.7LT607.2621.0579.6607.2
AlloyTemperAircraft modelsApplication parts and typical parts7055Aluminum sheet: T7751
Aluminum profile: T74511,T76511,T77511F-35,B777,ARJ21etcAll kinds of components, such as the upper wing structure, horizontal fin, joist beam, seat guide rail and freight slide, are required for high compressive strength and good corrosion resistance.