Abstract: 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.

Abstract: 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 <0.35; Mn <0.4; Cr: <0.25; Zn <0.04; other elements <0.05 each and <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 ?m between surface and ½ 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.

Abstract: 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 <0.35; Mn <0.4; Cr: <0.25; Zn <0.04; other elements <0.05 each and <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 ?m between surface and ½ thickness. The invention also relates to the method of manufacturing of such a vacuum chamber element.

Abstract: The present invention relates to a process for manufacturing a part (20) comprising a formation of successive metal layers (201 . . . 20n), superimposed on one another, each layer describing a pattern defined from a numerical model, each layer being formed by the deposition of a metal (15, 25), referred to as a filling metal, the filling metal being subjected, at a pressure greater than 0.5 times the atmospheric pressure, to an input of energy so as to melt and constitute said layer, the process being characterized in that the filling metal is an aluminium alloy of the 2xxx series, comprising the following alloying elements: Cu, in a weight fraction of between 3% and 7%; Mg, in a weight fraction of between 0.1% and 0.8%; at least one element, or at least two elements or even at least three elements chosen from: Mn, in a weight fraction of between 0.1% and 2%, preferably of at most 1% and in a preferred manner of at most 0.8%; Ti, in a weight fraction of between 0.

Abstract: The invention relates to a thin sheet metal for a reinforcing or structural part of a car body, consisting of an aluminium alloy of the following composition, in weight per cent: Si: 10-14; Mg: 0.05-0.8; Cu: 0-0.2; Fe: 0-0.5; Mn: 0-0.5; optionally at least one element selected from Na, Ca, Sr, Ba, Yt and Li, the quantity of said element if selected being between 0.01 and 0.05 for Na, Ca, Sr, Ba and Yt and between 0.1 and 0.3 for Li; Sb: 0-0.05; Cr: 0-0.1; Ti: 0-0.2; other elements amounting to <0.05 each and a total of <0.15; and the remainder being aluminium. 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 strucural part for a car body. The sheet metals according to the invention advantageously have a modulus of elasticity of at least 77 GPa.