Constellium Issoire

Constellium Valais Sa (Ag, Ltd)

Cedric Gasqueres

Jean-Etienne Fournier

Timothy Warner

Armelle Danielou

Christophe Sigli

The present invention relates to an aluminum alloy for the manufacture of thick blocks comprising (as a percentage by weight), Zn: 5.3-5.9%, Mg: 0.8-1.8%, Cu: <0.2%, Zr: 0.05 to 0.12%, Ti<0.15%, Mn<0.1%, Cr<0.1%, Si<0.15%, Fe<0.20%, impurities having an individual content of <0.05% each and <0.15% in total, the rest aluminum. The alloy may be used in a process comprising the steps of: In this process, said block is not subjected to any significant deformation by working between the casting and the tempering. The alloy and the method according to the invention are particularly useful for the manufacture of molds for injection-molding plastics.

Thick products made of 7XXX alloy and manufacturing process

The present invention relates to an aluminum alloy for the manufacture of thick blocks comprising (as a percentage by weight), Zn: 5.3-5.9%, Mg: 0.8-1.8%, Cu: &#x3c;0.2%, Zr: 0.05 to 0.12%, Ti&#x3c;0.15%, Mn&#x3c;0.1%, Cr&#x3c;0.1%, Si&#x3c;0.15%, Fe&#x3c;0.20%, impurities having an individual content of &#x3c;0.05% each and &#x3c;0.15% in total, the rest aluminum, The alloy may be used in a process comprising the steps of: In this process, said block is not subjected to any significant deformation by working between the casting and the tempering. The alloy and the method according to the invention are particularly useful for the manufacture of molds for injection-molding plastics.

The invention relates to a wrought product such as an extruded, rolled and/or forged aluminum alloy-based product, comprising, in weight %: Cu: 3.0-3.9; Li: 0.8-1.3; Mg: 0.6-1.0; Zr: 0.05-0.18; Ag: 0.0-0.5; Mn: 0.0-0.5; Fe+Si&#x2264;0.20; Zn&#x2264;0.15; at least one element from among: Ti: 0.01-0.15; Sc: 0.05-0.3; Cr: 0.05-0.3; Hf: 0.05-0.5; other elements &#x2264;0.05 each and &#x2264;0.15 total, remainder aluminum. The invention also relates to the process for producing said product. The products according to the invention are particularly useful in the production of thick aluminum products intended for producing structural elements in the aeronautical industry.

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Aix en Provence, France

Cedric Gasqueres