A method for manufacturing aluminum alloy strips with a thickness less than or equal to 12 .mu.m, by obtaining an alloy with composition (weight %): Si:0.15-0.40; Fe: 1.10-1.70; Mg<0.02; Mn:0.30-0.50; other elements <0.05 each and total <0.15; remainder aluminum; continuously casting between rolls a strip of this alloy with a thickness between 2 and 10 mm; homogenizing this strip at a temperature between 450 and 620.degree. C. with a duration between 8 and 40 hrs; cold-rolling of the homogenized strip; intermediate annealing of this cold-rolled strip to a temperature between 200 and 400.degree. C., and with a duration between 8 and 15 hrs; cold-rolling of the annealed strip up to the final thickness less than or equal to 12 .mu.m; and final annealing of the strip at a temperature between 200 and 300.degree. C., with a duration of at least 50 hrs. The method is notably applied to the manufacturing of strips for aseptic food packages of the brick type.

Een methode om de stroken van de aluminiumlegering met een dikte te vervaardigen minder dan of gelijk aan mu.m 12, door een legering met samenstelling te verkrijgen (gewicht %): Si:0.15-0.40; Fe: 1.10-1.70; Mg