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7A04 Aluminum forgings forged product parts

7A04 alloy is a heat-treated strengthening alloy of Al-Zn-Mg-Cu system. Its strength is higher than that of hard aluminium. Its yield strength is close to tensile strength and its plasticity is lower. Its sensitivity to stress concentration is strong, especially under the condition of vibration load and repeated static load. Therefore, the design, manufacturing and assembly of parts need to strictly avoid stress concentration and additional stress factors. The heat resistance of the alloy is poor, and it will soften sharply when the temperature is higher than 125 C. The stress corrosion resistance of thick parts in short and transverse direction is poor.
 
7A04 aluminum forgings forged product parts is widely used in the main stress parts of aircraft structure, such as girder, truss, partition frame, skin, wing rib, joint, landing gear parts, etc. It can produce various semi-finished products, such as sheets, strips, profiles, bars, wallboards, pipes, wires, free forgings and die forgings.
Chemical Composition of 7A04 aluminum alloy
Alloy Si Fe Cu Mn Mg Cr Ni Zn Ti Zr Others Al
Single Total
7A04 0.50 0.50 1.4~2.0 0.20~0.60 1.8~2.8 0.15~0.25 5.0~7.0 0.05 0.15 Rest
 

 7A04 Aluminum forgings

7A04 Aluminum forgings
 
Alloy Alloy series Main features Σb Value/MPa Working temperature/℃
7A04 B95(Russia) Yield strength is close to tensile strength, plasticity is low, and sensitivity to stress concentration is strong, especially under the condition of vibration load and repeated static load. Therefore, stress concentration and additional stress factors should be strictly avoided in the design, manufacture and assembly process of parts. The short transverse Kang stress corrosion resistance of the heavy alloy parts is poor.  
                  480~570
<125
Physical Property of 7A04 aluminum forgings forged product parts
Alloy Type Temper δ Specs/mm Direction σb/MPa σp 0.2/MPa δ % Standard
7A04 Free forgings T6 Weight ≤30KG L 510 420 6 GJB 2351-1995
Weight>30KG L 510 420 5
Die forgings T6 Weight≤30KG L 530 440 6
Weight>30KG L 430 440 6
                   
 
Alloy Temper Aircraft type Application parts and typical part
7A04 Aluminum forgings forged product parts:T6、T652、T73、T7352 Y8, Y12 Skin, wallboard, all kinds of beams (backlogs, forgings), partition frame, wing ribs, long truss, joints, landing gear parts, etc.
 
 
Type Alloy       Projected area
(m2)Or weight(kg)
Temper Standard
Aluminum free forgings 5 series ≤3000kg O、F GBn223
    ASTMB247
2、6、7 series ≤3000kg T6、T4、O、F
Aluminum die forgings 5 series ≤2.5m2 O、F
2、6、7 series ≤2.5m2 T6、T4、O、F
 
 
 

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