Constellium Issoire

Constellium Neuf-brisach

Christophe Chabriol

Jean-Philippe Masse

Lukasz Dolega

Ravi Shahani

Guillaume Delgrange

Romain-Fabrice Bernes

Petar Ratchev

The invention relates to a thin sheet metal for a reinforcing or structural part of a car body, consisting of an aluminum alloy. The invention also relates to the method for producing such a sheet metal and to the use of such a sheet metal for producing a reinforcing or structural part for a car body. The sheet metals according to the invention advantageously have a modulus of elasticity of at least 77 GPa.

Highly rigid sheet for car body

The invention relates to a vacuum chamber element obtained by machining and surface treatment of a plate of thickness at least equal to 10 mm made of aluminium alloy composed as follows (as percentages by weight), Si: 0.4-0.7, Mg: 0.4-1.0; the Mg/Si ratio as a percentage by weight being less than 1.8; Ti: 0.01-0.15, Fe 0.08-0.25; Cu &#x3c;0.35; Mn &#x3c;0.4; Cr: &#x3c;0.25; Zn &#x3c;0.04; other elements &#x3c;0.05 each and &#x3c;0.15 in total, the rest aluminium, characterized in that the grain size of said plate is such that the mean linear intercept length, measured in plane L/TC according to standard ASTM E112, is at least equal to 350 &#x3bc;m between surface and &#xbd; thickness. The invention also relates to the method of manufacturing of such a vacuum chamber element. The products according to the invention are particularly advantageous, particularly in terms of resistance to creep deformation at high temperature, while having high properties of corrosion resistance, homogeneity of properties in thickness and machinability.

Aluminium alloy vacuum chamber elements stable at high temperature

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Champier, France

Christophe Chabriol