Sheet of aluminum alloy for automobiles, the various fashioned on the basis of this sheet, and by the production of this sheet and the workpiece

摘要

An aluminium alloy sheet has the following chemical composition, by wt% : (A) 0.80 = Si = 1.2; (B) 0.10 = Fe = 0.30; (C) 0.05 = Mn = 0.20; (D) 0.10 = Mg = 0.30; (E) Cu =0.30; (F) Ti = 0.15; (G) the remainder being aluminium and other elements that are each present in a proportion of at most 0.05% and in total in a proportion of at most 0.15%. The aluminium alloy sheet is in the T4 state of heat treatment and has a limit of elasticity (RP) of at least 50 MPa, a uniform elongation (Au) of at least 20% and a total elongation (A 80) of at least 20%. Independent claims are also included for : (A) a component, such as a bonnet, produced in this aluminium alloy sheet; (B) the production of this aluminium alloy sheet.