The measurement of magnetic properties of electrical sheet steel - survey on methods and situation of standards

A brief review of the different requirements for magnetic measurement techniques for material research, modelling of material properties and grading of the electrical sheet steel for trade purposes is presented. In relation to the main application of laminated electrical steel, this payer deals with AC measurement techniques. Two standard methods, Epstein frame and Single Sheet Tester (SST), producing different results, are used in parallel. This dilemma was analysed in detail. The study leads to a possible solution of the problem, i.e. the possibility of converting the results of one of the two methods into the results of the other in order to satisfy the users of the Epstein method and. at the same time, to improve the acceptance of the more economical SST method. (C) 2000 Elsevier Science B.V. All rights reserved.