Process for the manufacture of hollow bodies made of aluminum al

Metal treatment – Compositions – Heat treating

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75141, 148 127A, 148 325, C22F 104

Patent

active

043459510

ABSTRACT:
The invention relates to a process for obtaining hollow bodies made of aluminum alloy having a high bursting strength, and to the products thus obtained. The alloy contains (by weight): from 7.6 to 9.5% of Zn from 1 to 1.8% of Cu; from 2.4 to 3.5% of Mg; from 0.07 to 0.17% of Cr; from 0.15 to 0.25% of Mn; from 0.08 to 0.14% of Zr; less than 0.2% of Fe, 0.15% of Si; 0.10% of Ti; and optionally less than 0.01% of V. It has a tensile stress (lengthwise direction) and a bursting strength (transverse direction) greater than or equal to 660 MPa. Its structure is characterized by the absence of large intermetallic compounds (>35 .mu.m) after a specific solidification test. It can be used in all the safety applications involving a container under pressure (bottles of compressed gas, etc.).

REFERENCES:
patent: 4305763 (1981-12-01), Quist et al.

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