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7A09 Forged Flange

Flange is the parts which connects two pipe ends, flange connection is defined by the flange, gasket and bolt three are connected as a group of combined sealing structure of the detachable connection.

  • LJ

7A09 is Al-Zn-Mg-CU ultra-hard aluminum. This alloy has been applied to the aircraft manufacturing industry in the late 1940s. It is still widely used in the aviation industry to be widely used in the aviation industry. Its characteristics are that after solid -soluble treatment, the plasticity is good, the thermal treatment effect is particularly good, there is a high strength below 150 ° C, and it has a particularly good low temperature strength; poor welding performance; the tendency of stress corrosion and cracking; Protective treatment. Dual -level timeliness can improve the ability of alloy anti -stress corrosion and cracking. The plasticity of the annealing and just quenching state is slightly lower than the 2A12 of the same state. It is slightly better than 7A04, the static fatigue of the board. The gap is sensitive, and the stress corrosion performance is better than 7A04.

Chemical Composition(%)


Mechanical Property

Tensile Strength σb (MPa):≥530

Yield Strength σp0.2 (MPa):≥400

Elongation δ10 (%):≥5


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