7050 is a high-strength heat-treatable alloy with extremely high strength and resistance to drop corrosion and stress corrosion cracking. 7050 aircraft aerospace grade aluminum plate sheet commonly used in aircraft structural parts for medium and thick plate kneading parts, free forging parts and die forging parts. The requirements of the alloy for the production of such parts are: drop corrosion resistance and stress corrosion cracking resistance, cracking toughness and fatigue resistance. 
High strength heat treated alloy
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Chemical Composition of 7050 Alloy |
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|
Alloy |
Si |
Fe |
Cu |
Mn |
Mg |
Cr |
Ni |
Zn |
Ti |
Zr |
Others |
Al |
|
|
Each |
Total |
||||||||||||
|
7050 |
0.12 |
0.15 |
2.0~2.6 |
0.1 |
1.9~2.6 |
0.04 |
~ |
5.7~6.7 |
0.06 |
0.08~0.15 |
0.05 |
0.15 |
Remainder |
|
Alloy0 |
Alloy series |
Main features |
Σb Value/MPa |
Working temperatue/℃ |
|
7050 |
7050 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 |
<125 |
|
Physical Properties of 7050 Alloy |
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|
Alloy |
Type |
Temper |
Specifications/mm |
Direction |
σb/MPa |
σp 0.2/MPa |
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|
A |
B |
A |
B |
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|
7050 |
Aluminum sheet |
T7451 |
δ6.35～38.1 |
L |
217.6 |
524.4 |
448.5 |
462.3 |
|
LT |
510.6 |
524.4 |
441.6 |
455.4 |
||||
|
δ38.125～76.2 |
L |
510.6 |
524.4 |
448.5 |
455.4 |
|||
|
LT |
517.5 |
524.4 |
441.6 |
455.4 |
||||
|
δ76.225～101.6 |
L |
510.6 |
517.5 |
448.5 |
455.4 |
|||
|
LT |
510.6 |
517.5 |
441.6 |
455.4 |
||||
|
ST |
469.2 |
496.8 |
407.1 |
414.0 |
||||
|
δ101.625～127 |
L |
496.8 |
503.7 |
427.8 |
448.5 |
|||
|
LT |
496.8 |
510.6 |
420.9 |
441.6 |
||||
|
ST |
462.3 |
476.1 |
400.2 |
414.0 |
||||
|
δ127.025～152.4 |
L |
489.9 |
496.8 |
414.0 |
434.7 |
|||
|
LT |
483.0 |
503.7 |
414.0 |
427.8 |
||||
|
ST |
455.4 |
476.1 |
393.3 |
393.3 |
||||
|
T7651 |
δ25.425～38.1 |
L |
531.3 |
552.0 |
462.3 |
489.9 |
||
|
LT |
524.4 |
545.1 |
455.4 |
483.0 |
||||
|
δ38.125～50.8 |
L |
524.4 |
538.2 |
455.4 |
483.0 |
|||
|
LT |
517.5 |
538.2 |
448.5 |
476.1 |
||||
|
ST |
496.8 |
517.5 |
407.1 |
434.7 |
||||
|
δ50.825～63.5 |
L |
517.5 |
538.2 |
455.4 |
483.0 |
|||
|
LT |
517.5 |
538.2 |
448.5 |
476.1 |
||||
|
ST |
483.0 |
503.7 |
414.0 |
427.8 |
||||
|
Aluminum profile |
T76511 |
δ≤12.675 |
L |
531.3 |
545.1 |
469.2 |
489.9 |
|
|
LT |
524.4 |
538.2 |
462.3 |
476.1 |
||||
|
Free aluminum forgings |
T7452 |
δ152.425～177.8 |
L |
469.2 |
489.9 |
386.4 |
420.9 |
|
|
LT |
462.3 |
483 |
386.4 |
407.1 |
||||
|
ST |
448.5 |
476.1 |
358.8 |
386.4 |
||||
|
Alloy |
Temper |
Aircraft models |
Application parts and typical parts |
|
7050 |
Aluminum 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.. |
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