Abstract: An iron-cobalt alloy containing in weight percentages: 10 to 22% of Co; traces to 2.5% of Si; traces to 2% of Al; 0.1 to 1% of Mn; traces to 0.0100% of C, a total of O, N and S content ranging between traces of 0.0070%; a total of Si, Al, Cr, Mo, V, Mn content ranging between 1.1 and 3.5%; a total of Cr, Mo and V content ranging between traces of 3%; a total of Ta and Nb content ranging between traces and 1%; and the rest being iron and impurities resulting from production wherein: 1.23×(Al+Mo) %+0.84 (Si+Cr+V) %?0.15×(Co %?15)?2.1, and 14.5×(Al+Cr) %+12×(V+Mo) %+25×Si %?21. The inventive alloy is useful for making electromagnetic actuator mobile cores.

Abstract: An iron-cobalt alloy containing in weight percentages: 10 to 22% of Co; traces to 2.5% of Si; traces to 2% of Al; 0.1 to 1% of Mn; traces to 0.0100% of C, a total of O, N and S content ranging between traces of 0.0070%; a total of Si, Al, Cr, Mo, V, Mn content ranging between 1.1 and 3.5%; a total of Cr, Mo and V content ranging between traces of 3%; a total of Ta and Nb content ranging between traces and 1%; and the rest being iron and impurities resulting from production wherein: 1.23×(Al+Mo) %+0.84 (Si+Cr+V) %?0.15×(Co %?15)?2.1, and 14.5×(Al+Cr) %+12×(V+Mo) %+25×Si %?21. The inventive alloy is useful for making electromagnetic actuator mobile cores.

Abstract: The invention concerns an iron-cobalt alloy, characterised in that it comprises in weight percentages: 10 to 22% of Co; traces to 2.5% of Si; traces to 2% of Al; 0.1 to 1% of Mn; traces to 0.0100% of C; a total of O, N and S content ranging between traces and 0.0070%; a total of Si, Al, Cr, Mo, V, Mn content ranging between 1.1 and 3.5%; a total of Cr, Mo and V content ranging between traces and 3%; a total of Ta and Nb content ranging between traces and 1%; the rest being iron and impurities resulting from production; and in that: 1.23×(Al+Mo)%+0.84 (Si+Cr+V)%?0.15×(Co%?15)?2.1 and in that 14.5×. (Al+Cr)%+12×(V+Mo)%+25×Si%?21. The inventive alloy is useful for making electromagnetic actuator mobile cores.

Abstract: The invention concerns an iron-cobalt alloy, characterised in that it comprises in weight percentages: 10 to 22% of Co; traces to 2.5% of Si; traces to 2% of Al; 0.1 to 1% of Mn; traces to 0.0100% of C; a total of O, N and S content ranging between traces and 0.0070%; a total of Si, Al, Cr, Mo, V, Mn content ranging between 1.1 and 3.5%; a total of Cr, Mo and V content ranging between traces and 3%; a total of Ta and Nb content ranging between traces and 1%; the rest being iron and impurities resulting from production; and in that: 1.23×(Al+Mo) %+0.84 (Si+Cr+V) %−0.15×(Co %−15)≦2.1 and in that 14.5×. (Al+Cr) %+12×(V+Mo) %+25×Si %≧21. The inventive alloy is useful for making electromagnetic actuator mobile cores.

Abstract: Soft magnetic alloy of the iron-nickel type, the chemical composition of which comprises, in % by weight: 34%≦Ni≦40%; 7%≦Cr≦10%; 0.5%≦Co≦3%; 0.1%≦Mn≦1%; O≦0.007%; S≦0.002%; N≦0.004%; with N+S+O≦0.01%; iron and impurities 5 resulting from the production process. Use in motors especially suited for use in horology.

Abstract: Cooking vessel intended to be induction heated, comprising a heating part made of a ferromagnetic alloy having a Curie temperature of between 150° C. and 370° C. and a magnetostriction coefficient &lgr;s≦5×10−6 in absolute value. FeNiCuX ferromagnetic alloy for the manufacture of the cooking vessel, the chemical composition of which comprises from 50% to 85% of Ni, less than 50% of Cu, less than 12% of X=Cr+Mo+Mn+Si+Al+W+Nb+V+Ti, the balance being iron and impurities; the composition satisfies the relationships (35/25)×(75-Ni)≦Cu≦(50/35)×(85-Ni) and (7/20)×(Ni-65)≦X≦(12/35)×(Ni-50). Production method and method of use.

Abstract: Cooking vessel intended to be induction heated, comprising a heating part made of a ferromagnetic alloy having a Curie temperature of between 150° C. and 370° C. and a magnetostriction coefficient &lgr;s≦5×10−6 in absolute value. FeNiCuX ferromagnetic alloy for the manufacture of the cooking vessel, the chemical composition of which comprises from 50% to 85% of Ni, less than 50% of Cu, less than 12% of X=Cr+Mo+Mn+Si+Al+W+Nb+V+Ti, the balance being iron and impurities; the composition satisfies the relationships (35/25)×(75−Ni)≦Cu≦(50/35)×(85−Ni) and (7/20)×(Ni−65)≦X≦(12/35)×(Ni−50). Production method and method of use.

Abstract: Soft magnetic alloy of the iron-nickel type, the chemical composition of which comprises, by weight: 40%≦Ni+Co≦65%; 0%≦Co≦7%; 2%≦Cr≦5%; 1%≦Ti≦3%; 0%≦Al≦0.5%; 0%≦Mn+Si≦2%; optionally, up to 3% Mo, 2% W, 2% V, 1.5% Nb, 1% Ta and 3% Cu, the sum of the Cr, Mo, W, V, Nb, Ta and Cu contents being less than 7% and the sum of the Mo, W, V, Nb, Ta and Cu contents being less than 4%; the balance being iron and impurities, such as carbon, sulfur and phosphorus, resulting from the smelting process, the chemical composition furthermore satisfying the relationships: Cr<5−0.015×(Ni+Co−52.5)2, if: Ni+Co≦52.5; Cr<5−0.040×(Ni+Co−52.5)2, if: Ni+Co≧52.5; the alloy having a saturation induction Bs of greater than 0.9 tesla, a coercive field of less than 10 A/m, an electrical resistivity p of greater than 60 &mgr;&OHgr;.cm and a hardness of greater than 200 HV. Process for manufacturing the alloy and uses.

Abstract: An iron--cobalt alloy the chemical composition of which comprises, by weight: 35%.ltoreq.Co.ltoreq.55%; 0.5%.ltoreq.V.ltoreq.2.5%; 0.02%.ltoreq.Ta+2.times.Nb.ltoreq.0.2%; 0.0007%.ltoreq.B.ltoreq.0.007%; C.ltoreq.0.05%; the balance being iron and impurities resulting from the smelting operation.

Abstract: Stepper motor of the type comprising a rotor (1), a stator (2) and a coil (3) consisting of a magnetic core (4) and of a winding (5), in which the stator (2) consists of a soft magnetic alloy of the FeNiCr type, the chemical composition of which includes, by weight: 40%.ltoreq.Ni+Co.ltoreq.60%, 0%.ltoreq.Co.ltoreq.7%, 8%.ltoreq.Cr.ltoreq.13.5%, 8%.ltoreq.Cr+Mn+Si+Mo+Nb+V+W.ltoreq.13.5%, the remainder being iron and impurities resulting from the manufacture. Soft magnetic alloy.