Aluminium alloy for pressurized hollow articles

C - Chemistry – Metallurgy – 22 – C

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C22C 21/10 (2006.01) C22F 1/053 (2006.01) F17C 1/14 (2006.01)

Patent

CA 2106320

Un alliage de la série 7000 et un traitement thermique spécifique en vue de la fabrication de corps creux sous pression, et en particulier, de bouteilles métalliques pour gaz comprimés. L'alliage contient en poids % : 6,25 <= Zn <= 8,0~ Mn <= 0,20 1,2 <= Mg <= 2,2 ~ Ti <= 0,05 1,7 <= Cu <= 2,8 0,10 <= Zr <= 0,25 Autres chacun <= 0,05 Fe <= 0,20 ~~ " total <= 0,15 Si+fe <= 0,40 ~~ Reste : A1. Cr <= 0,05. Le revenu final est de préférence pratiqué en 3 étapes : - lère étape : entre 105 et 120°C pendant 6 à 12h - 2ème étape : entre 170 et 190°C pendant 0,5 à 20h - 3ème étape : entre 105 et 120°C pendant 12 à 36h.

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