Abstract: The invention relates to a metal composite panel intended for construction, including at least two substantially parallel sheets (21) and (22) with at least three profiles (3) substantially parallel to each other arranged between and fastened to the sheets. The three profiles serve as separators, making it possible to separate the sheets and are arranged so that the average distance between two adjacent profiles is not necessarily uniform but suited to the local conditions of use of said panel. In order to obtain a panel having an optimal compromise between weight and performance, light alloys and, in particular, aluminum are advantageous. The composite panels are particularly useful as a floor of a rolling vehicle, as the floor, deck or ramp of a floating vehicle or as the floor of a flying vehicle.

Abstract: Auto body roof comprising at least one steel part and a skin part made of aluminum alloy that is attached to the steel part before painting. The aluminum part comprises a sheet of the following composition: Si: 0.7-1.3, Fe<0.5, Cu: 0.5-1.1, Mn: 0.4-1.0, Mg: 0.6-1.2, Zn<0.7, Cr 0.25, Zr+Ti 0.20, other elements <0.05 each and <0.15 total, and the remainder aluminum. The aluminum part, after solution treatment, quenching and age-hardening for three weeks at room temperature, possesses a yield strength R0.2 of less than 170 MPa, and preferably 160 MPa.

Abstract: The invention relates to a metal composite panel intended for construction, including at least two substantially parallel sheets (21) and (22) and, arranged between them, profiles (3) substantially parallel to each other and fastened to said sheets, characterised in that said profiles, numbering at least three, serve as separators making it possible to separate said sheets and are arranged so that the average distance between two adjacent profiles is not necessarily uniform but suited to the local conditions of use of said panel. In order to obtain a panel having an optimal compromise between weight and performance, light alloys and, in particular, aluminium are advantageous. The composite panels according to the invention are particularly useful as a floor of a rolling vehicle, as the floor, deck or ramp of a floating vehicle or as the floor of a flying vehicle.

Abstract: Auto body roof comprising at least one steel part and a skin part made of an aluminum alloy that is attached to the steel part before painting. The aluminum part comprises a sheet of the following composition: Si: 0.7-1.3, Fe<0.5, Cu: 0.5-1.1, Mn: 0.4-1.0, Mg: 0.6-1.2, Zn<0.7, Cr<0.25, Zr+Ti<0.20, other elements <0.05 each and <0.15 total, and the remainder aluminium. The aluminum part, after solution treatment, quenching and age-hardening for three weeks at room temperature, possesses a yield strength R0.2 of less than 170 MPa, and preferably 160 MPa.