Abstract: The invention concerns a strip or sheet of ferritic stainless steel of the following composition (% by weight):(C+N)<.060;Si<0.9;Mn<1;Cr=15 to 19;Mo<1;Ni<0.5;Ti<0.1;Cu<0.4;S<0.02;P<0.045;Zr=0.10 to 0.40, and 7(C+N).ltoreq.Zr.ltoreq.7(C+N)+0.15;Nb=0.25 to 0.55, in non-combined form;Al=0.020 to 0.080;Fe=the balance,in which Al is essentially in solid solution.The process for the production of the sheet or strip comprises a final annealing operation which is carried out at between 980.degree. and 1020.degree. C., typically for 0.5 to 5 minutes at between 990.degree. and 1010.degree. C.The strip or sheet according to the invention is used for any application requiring an economic compromise in regard to ductility (sheet and welds), hot resistance and resistance to corrosion, for example in motor vehicle exhaust manifolds.