The invention relates to a soft magnetic alloy with the following composition in wt. %: 28%.ltoreq.Ni.ltoreq.34%, 0%.ltoreq.Co.ltoreq.4%, 0%.ltoreq.Cu.ltoreq.4%, 1%.ltoreq.Cr, 0%.ltoreq.Mo.ltoreq.8%, 0%.ltoreq.Nb.ltoreq.1%, 0%.ltoreq.Mn.ltoreq.2%, 0%.ltoreq.V.ltoreq.5%, 0%.ltoreq.W.ltoreq.5%, 0%.ltoreq.Si.ltoreq.4%, 0%.ltoreq.Al.ltoreq.4%, 0%.ltoreq.C.ltoreq.0.4%, optionally one or several elements selected from magnesium and calcium the content of which is such as to remain below 0.1%, the rest being iron and impurities from production. The chemical composition furthermore satisfies the following relationships: 180.5.ltoreq.6.times.Ni2.5.times.(Cr+Mo+V+W+Si+Al)+4.times.(Co+Cu).ltoreq- .197.5 et Co+Cu.ltoreq.4%. The invention relates to the use thereof for production of a stator for use in a motor for clock-making.