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7055 T77 Aluminum forgings forged product parts

7055 aluminium forgings forged product parts are generally used in the T77 state to manufacture aircraft load-bearing structural parts recently produced, such as 7055 T77511 for the upper wing panel of ARJ21-700 regional airliner being manufactured in China, 7055-T77 for landing gear joints and 7055 T76511 for the long truss of the fuselage. 7055 super-strength aluminium alloy is the highest strength alloy in wrought aluminium alloy at present. The microstructure of 7055 alloy is resistant to intergranular cracking and corrosion, and its microstructure has strong ability to hinder dislocation movement.

7055 T77 aluminium forgings forged product parts are generally used in large aircraft upper wing skin, truss, horizontal tail, keel beam, seat rail, freight slide. Compressive strength and tensile strength are 10% higher than 7150, and fracture toughness and corrosiveness are similar to 7150.
                                                            7050 Alloy Chemical Composition
Alloy Si Fe Cu Mn Mg Cr Ni Zn Ti Zr         Others Al
Unit Total
7055 0.10 0.15 2.0~2.6 0.05 1.8~2.3 0.04 ~ 7.6~8.4 0.06 0.05~0.25 0.05 0.15 Rest
Alloy Alloy sereis Main features Σb Value /MPa Working temperature/℃
7055 7050 series 7055 is currently the highest alloying degree of 7 x x x series aluminium alloy. Compared with 7150 alloy, it improves tensile and compressive strength while maintaining some important properties such as fracture toughness and corrosion resistance.  
Type Alloy Projected area(m2)Or weight(kg) Temper Standard
Aluminum free forging 5 series ≤3000kg O、F GBn223
2、6、7 series ≤3000kg T6、T4、O、F、T77
Aluminum die forging 5 series ≤2.5m2 O、F
2、6、7 series ≤2.5m2 T6、T4、O、F、T77

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