“…As described in review articles by Korzunin et al, 1,2 consequential to the many processing steps used in the fabrication of electrical steels, the many factors needing careful control during each step, and to the batch size required for economical production, these materials typically exhibit significant variations in composition, microstructure, residual stress and gauge. Such variations exist between rolls, between sheets taken from different locations within one roll, between samples taken from one sheet and even locally on one sample.…”