Abstract: The present disclosure relates to a hollow shaft for an electric motor, which has a hollow cylindrical shaft body, wherein the shaft body has at least two rotationally symmetrical hollow components, which are positioned one inside the other and joined together using soldering, wherein a first hollow component has a central through opening having an inner diameter and a further hollow component is inserted in the first hollow component, wherein the further hollow component is joined to the inner circumference of the through opening of the first hollow component while bearing thereon.

Abstract: The present invention relates to a, comprising a tubular element (10) with at least one heat-affected zone (14), characterized by a yield strength Rp0.2 in the heat-affected zone (14) of at least 640 MPa and a tensile strength Rm in the heat-affected zone of at least 850 MPa and by at least the tubular element (10) consisting of a steel alloy consisting, in weight percent: C 0.12-0.22% Mn 1.5-2.5% Si 0.45-0.85% Cr ??<1.5% V ?0.04% B 0.0010-0.0040% Ti ??0.02-0.1% und optionally Mo ???0.6%, balance iron and impurities resulting from smelting.

Abstract: The present invention relates to a, comprising a tubular element (10) with at least one heat-affected zone (14), characterized by a yield strength Rp0.2 in the heat-affected zone (14) of at least 640 MPa and a tensile strength Rm in the heat-affected zone of at least 850 MPa and by at least the tubular element (10) consisting of a steel alloy consisting, in weight percent: C 0.12-0.22% Mn 1.5-2.5% Si 0.45-0.85% Cr ??<1.5% V ?0.04% B 0.0010-0.0040% Ti ??0.02-0.1% und optionally Mo ???0.6%, balance iron and impurities resulting from smelting.