Aluminum alloy for automotive applications, e.g. luxury cars, transport vans or trucks, comprises specified amount of silicon, iron, manganese, magnesium, copper, titanium, other elements and aluminum

摘要

An aluminum alloy sheet comprises (wt.%) silicon (0.8-1.2); iron (0.1-0.3); manganese (0.05-0.2); magnesium (0.1-0.3); copper (=0.3); titanium (=0.15); other elements up to 0.05 each, up to 0.15 in total and aluminum balance. In T4 temper condition having a yield strength (Rp) of =50 MPa, a uniform elongation (Au) of =20% and a total elongation (A80) of =22%. Independent claims are also included for: (A) a formed part, e.g. bonnet part, particularly an inner formed part, of an aluminum alloy, after forming and paint baking having a yield strength of below 150, preferably105-130 MPa; and (B) a process for producing an aluminum alloy sheet comprising casting an aluminum alloy with a composition; homogenization and/or preheating; hot-rolling; cold-rolling to an intermediate gauge optionally followed by inter-annealing; cold-rolling to final gauge; solution heat treating by continuous annealing; and quenching, preferably by forced air, to produce a sheet in T4-condition.