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BS EN IEC 60404-13:2018

BS EN IEC 60404-13:2018

$142.49

Magnetic materials – Methods of measurement of resistivity, density and stacking factor of electrical steel strip and sheet

Published By Publication Date Number of Pages
BSI 2018 30
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This part of IEC 60404 specifies the methods used for determining the resistivity, density and stacking factor of grain-oriented and non-oriented electrical steel strip and sheet. These quantities are necessary to establish the physical characteristics of the material. Moreover, the density is necessary to allow specified values of the magnetic polarization, resistivity and stacking factor to be determined.

Since these properties are functions of temperature, the measurements will be made at an ambient temperature of (23 ±5) °C except when specified in this document.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
9 FOREWORD
11 1 Scope
2 Normative references
3 Terms and definitions
12 4 Determination of the resistivity
4.1 General
4.2 Principles of measurement
4.2.1 Method of determining ρ for an Epstein strip specimen (Method R1)
Figures
Figure 1 – Circuit for the measurement of resistance ofan Epstein strip specimen (Method R1)
13 4.2.2 Method of determining ρ for a rectangular sheet specimen (Method R2) with supplementary remarks for strip specimen
Figure 2 – Circuit for the measurement of resistance ofa rectangular sheet specimen (Method R2)
14 4.2.3 Determination of thickness d
15 4.3 Test specimen
4.3.1 Epstein strip specimen
4.3.2 Rectangular sheet specimen
4.4 Apparatus
4.4.1 Common requirements for Method R1 and Method R2
4.4.2 Requirements for Method R1
16 4.4.3 Requirements for Method R2
4.5 Measuring procedure
4.5.1 Determination of the thickness d of the test specimen
4.5.2 Procedure with strip specimen (Method R1)
4.5.3 Procedure with rectangular sheet specimen (Method R2)
4.6 Reproducibility
17 4.7 Test report
5 Determination of the density
5.1 General
18 5.2 Method based on the measurement of resistance (Method D1)
5.2.1 Principles of measurement
Figure 3 – Experimental data and the regression line of the density ρm againstthe product ρm·ρ for non-oriented electrical steel sheet [6]
19 5.2.2 Test specimen
5.2.3 Measuring procedure
20 5.2.4 Reproducibility
5.3 Gas pyknometer method (Method D2)
5.3.1 Principles of measurement
5.3.2 Test specimen
5.3.3 Test apparatus
5.3.4 Measuring procedure
5.3.5 Reproducibility
5.4 Test report
21 6 Determination of the stacking factor
6.1 General
6.2 Test specimen
6.3 Measuring procedure
22 6.4 Reproducibility
6.5 Test report
Figure 4 – Schematic diagram of stacking specimen and rams
24 Annex A (informative)An example of the apparatus for the measurement of the resistivityusing a rectangular sheet specimen (Method R2)
Figure A.1 – Schematic cross-sectional view of the arrangementof the contact holder
25 Annex B (informative)An example of the determination of density usingthe gas pyknometer method (Method D2)
B.1 Overview
B.2 Test specimen
Table B.1 – Number of test discs of diameter 36 mm
26 B.3 Apparatus
B.4 Calibration
B.5 Measuring procedure
Figure B.1 – Diagram illustrating the two-chamber pressure gas pyknometer
27 B.6 Repeatability
28 Annex C (informative)Calculation of density based onsilicon and aluminium content (Method D4)
29 Bibliography

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BS EN IEC 60404-13:2018
$142.49