1 Scope
This standard specifies the methods used for determining the density, resistivity and stacking factor of electrical steel sheet and strip. These quantities are necessary to establish the magnetic characteristics of the material. In particular, the density is necessary to allow specified values of the flux density to be set without knowing the thickness of the test specimen.
For the determination of the density, the immersion method was earlier considered to be a fundamental method for use in cases of arbitration. However, experience has shown that this method is very difficult to use in the case of sheet test specimens with a relatively large surface area. This method is therefore not included. It is described in GB/T 5163, GB/T 1033 and ISO 1183.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
GB/T 1033-1986 Test Method for Density and Relative Density of Plastics
GB/T 3655 Methods of Measurement of the Magnetic Properties of Electrical Steel Sheet and Strip by Means of an Epstein Frame
GB/T 5163-1985 Permeable Sintered Metal Materials - Determination of Density
GB/T 10129 Methods of Measurement of Magnetic Properties of Magnetic Steel Sheet and Strip at Medium Frequencies
GB/T 13789 Methods of Measurement of the Magnetic Properties of Magnetic Sheet and Strip by Means of a Single Sheet Tester
ISO 1183-1987 Plastics - Methods for Determining the Density and Relative Density of Non-cellular Plastics
1 Scope
2 Normative References
3 Determination of the Density
4 Determination of the resistivity
5 Determination of the Stacking Factor
Annex A (Informative) Bibliography
Annex B (Informative) Comparison of Chapter and Article Numbers between This Standard and IEC 404-13:1995
Annex C (Informative) Technical Differences and Their Reasons between This Standard and IEC 404-13:1995
