Applies to magnetic material intended for the construction of magnetic circuits. These materials correspond respectively to classes C.21 and B.2 of IEC 60404-1: 2000. This standard defines the grades of cold-rolled electrical non-oriented non-alloyed (non alloyed steel is that steel the basic constituent of which is iron containing alloying elements in amounts smaller than the limiting values fixed by ISO 4948 1) or alloyed (alloyed steel is that steel the basic constituent of which is iron containing alloying elements in amounts equal to or greater than the limiting values fixed by ISO 4948 1) steel sheet and strip delivered in the semi-processed state, i.e. without final heat treatment, of nominal thicknesses given in Tables 1 and 2. It specifies general requirements, the magnetic properties, the geometrical characteristics and tolerances, technological characteristics as well as the inspection procedure.