The main alloying element of 7075 is zinc, which has strong strength, good mechanical properties and anode reaction. 7075 aircraft aerospace grade aluminum plate sheet is mainly used to manufacture aircraft structures and other high-stress structural parts that require high strength and corrosion resistance, such as aircraft upper and lower wing panels, stringers, etc. After solution treatment, the plasticity is good, the heat treatment strengthening effect is good, it has good strength below 150 degrees, and has particularly good low temperature strength, poor welding performance, and stress corrosion cracking tendency. It is also widely used in mold processing, mechanical equipment, fixtures, etc.
7075 alloy has excellent low temperature strength
|
Chemical Composition of 7075 alloy |
|||||||||||||
|
Alloy |
Si |
Fe |
Cu |
Mn |
Mg |
Cr |
Ni |
Zn |
Ti |
Zr |
Others |
Al |
|
|
Each |
Total |
||||||||||||
|
7075 |
0.40 |
0.50 |
1.2~2.0 |
0.3 |
2.1~2.9 |
0.18~0.28 |
~ |
5.1~6.1 |
0.20 |
~ |
0.05 |
0.15 |
Remainder |
|
Alloy |
Alloy Series |
Main features |
σb Value/MPa |
Working Temperature/℃ |
|
7075 |
7075 series |
7075 T6 T62 T7351 aluminum alloy plate sheet is currently the most widely used 7 * * * aviation Aluminum Alloy, main supply varieties of aluminum or aluminum, heat treatment condition of O, T6, T73, T76. The static strength of T6 is the highest, the ductility is the lowest and the fatigue is the worst. It is sensitive to stress corrosion cracking, and toughness decreases with the decrease of temperature. So the T6 state is not applied to cryogenic working parts. T73 has the lowest state strength, but has high fracture toughness and excellent resistance to stress corrosion cracking and denudation. The performance of T76 is between T6 and T73. Compared with T6 state, it has low strength but good resistance to stress corrosion. Compared with T73 state, its strength is high, but its stress corrosion resistance is poor. |
421～538 |
<125 |
|
Alloy |
Type |
Temper |
Size/mm |
Direction |
σb/MPa |
σp 0.2/MPa |
||
|
A |
B |
A |
B |
|||||
|
7075 |
Aluminum sheet |
T6 T62 |
δ0.305～0.991 |
L |
524.4 |
538.2 |
476.1 |
496.8 |
|
LT |
524.4 |
538.2 |
462.3 |
483.0 |
||||
|
δ1.016～3.175 |
L |
538.2 |
552.0 |
483.0 |
496.8 |
|||
|
LT |
538.2 |
552.0 |
469.2 |
483.0 |
||||
|
δ3.200～6.325 |
L |
538.2 |
552.0 |
489.9 |
503.7 |
|||
|
LT |
538.2 |
552.0 |
476.1 |
489.9 |
||||
|
δ6.35～12.675 |
L |
510.6 |
524.4 |
448.5 |
462.3 |
|||
|
LT |
538.2 |
538.2 |
462.3 |
476.1 |
||||
|
δ12.7～25.4 |
L |
510.6 |
524.4 |
455.4 |
469.2 |
|||
|
LT |
538.2 |
552.0 |
469.2 |
483.0 |
||||
|
δ25.425～50.8 |
L |
503.7 |
517.5 |
441.6 |
448.5 |
|||
|
LT |
531.3 |
545.1 |
462.3 |
476.1 |
||||
|
δ50.825～63.5 |
L |
496.8 |
510.6 |
414.0 |
427.8 |
|||
|
LT |
524.4 |
538.2 |
441.6 |
455.4 |
||||
|
ST |
483.0 |
489.9 |
407.1 |
420.9 |
||||
|
δ63.525～76.2 |
L |
476.1 |
489.9 |
386.4 |
400.2 |
|||
|
LT |
489.9 |
503.7 |
400.2 |
414 |
||||
|
ST |
455.4 |
469.2 |
386.4 |
400.2 |
||||
|
δ76.225～88.9 |
L |
469.2 |
483.0 |
358.8 |
372.6 |
|||
|
LT |
489.9 |
503.7 |
400.2 |
414.0 |
||||
|
ST |
448.5 |
462.3 |
372.6 |
379.5 |
||||
|
δ88.9～101.6 |
L |
441.6 |
455.4 |
331.2 |
338.1 |
|||
|
LT |
462.3 |
476.1 |
372.6 |
386.4 |
||||
|
ST |
420.9 |
434.7 |
345.0 |
358.8 |
||||
|
T7351 |
δ12.7～25.4 |
L |
469.2 |
483.0 |
393.3 |
407.1 |
||
|
LT |
476.1 |
489.9 |
393.3 |
407.1 |
||||
|
δ25.425～38.1 |
L |
462.3 |
476.1 |
393.3 |
407.1 |
|||
|
LT |
469.2 |
483.0 |
393.3 |
407.1 |
||||
|
δ38.125～50.8 |
L |
455.4 |
469.2 |
379.5 |
393.3 |
|||
|
LT |
462.3 |
476.1 |
379.5 |
393.3 |
||||
|
ST |
434.7 |
448.5 |
358.5 |
372.6 |
||||
|
δ50.825～63.5 |
L |
448.5 |
462.3 |
358.8 |
372.6 |
|||
|
LT |
455.4 |
469.2 |
365.7 |
379.5 |
||||
|
ST |
427.8 |
441.6 |
338.1 |
358.8 |
||||
|
δ63.525～76.2 |
L |
437.7 |
448.5 |
338.1 |
365.7 |
|||
|
LT |
448.5 |
455.4 |
358.8 |
365.7 |
||||
|
ST |
414.0 |
427.8 |
324.3 |
345.0 |
||||
|
Alloy |
Temper |
Aircraft models |
Application parts and typical parts |
|
7075 |
Aluminum sheet： T6、T62、T7351 Aluminum plate： T6、T62、T7351 |
Widely used |
Panels, beams, frames, wing ribs, joints, etc. |
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