BS IEC 60404-8-7:2020
$142.49
Magnetic materials – Specifications for individual materials. Cold-rolled grain-oriented electrical steel strip and sheet delivered in the fully-processed state
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 24 |
IEC 60404-8-7:2020 is available as IEC 60404-8-7:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60404-8-7:2020 defines the grades of cold-rolled grain-oriented electrical steel strip and sheet in nominal thicknesses of 0,20 mm, 0,23 mm, 0,27 mm, 0,30 mm and 0,35 mm. In particular, it gives general requirements, magnetic properties, geometric characteristics, tolerances and technological characteristics, as well as inspection procedures. This document applies to Goss textured grain-oriented electrical steel strip and sheet supplied in the final annealed condition in coils or sheets, and intended for the construction of magnetic circuits. The grades are grouped into three classes: – conventional grades; – high permeability grades; – magnetic domain refined high permeability grades. They correspond to Class C22 of IEC 60404-1. This edition includes the following significant technical changes with respect to the previous edition: – insertion of a third class of grain-oriented electrical steels for magnetic domain refined high permeability grades; – introduction of the single sheet tester (SST) method as reference measurement method for this third class of material together with a conversion factor for transposition of the SST measurement results to equivalent Epstein values; – update of the electrical steel range to take account of the current offers and demands of grades.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 4 | CONTENTS |
| 6 | FOREWORD |
| 8 | INTRODUCTION |
| 9 | 1 Scope 2 Normative references |
| 10 | 3 Terms and definitions 4 Classification |
| 11 | 5 Designation 6 General requirements 6.1 Production process 6.2 Form of supply 6.3 Delivery condition |
| 12 | 6.4 Surface condition 6.5 Suitability for cutting 7 Technical requirements 7.1 Magnetic properties 7.1.1 General 7.1.2 Magnetic polarization 7.1.3 Specific total loss 7.1.4 Magnetic properties of magnetic domain refined high permeability grades |
| 13 | Tables Table 1 – Technological and magnetic properties of the conventional grades of grain-oriented electrical steel strip and sheet (magnetic properties are measured using the Epstein method according to IEC 60404-2) |
| 14 | Table 2 – Technological and magnetic properties of the high permeability grades of grain-oriented electrical steel strip and sheet (magnetic properties are measured using the Epstein method according to IEC 60404-2) |
| 15 | 7.2 Geometric characteristics and tolerances 7.2.1 Thickness Table 3 – Technological and magnetic properties of magnetic domain refined high permeability grades of grain-oriented electrical steel strip and sheet (magnetic properties are measured using the Single Sheet Test method* according to IEC 60404-3). |
| 16 | 7.2.2 Width 7.2.3 Length 7.2.4 Edge wave (wave factor) Table 4 – Tolerances on nominal thickness Table 5 – Tolerances on nominal width |
| 17 | 7.2.5 Residual curvature 7.2.6 Edge camber 7.2.7 Burr height 7.3 Technological characteristics 7.3.1 Density 7.3.2 Stacking factor 7.3.3 Number of bends 7.3.4 Deviation from the shearing line (internal stress) 7.3.5 Insulation coating resistance |
| 18 | 8 Inspection and testing 8.1 General 8.2 Selection of samples 8.3 Preparation of test specimens 8.3.1 Magnetic properties |
| 19 | 8.3.2 Geometrical characteristics and tolerances 8.3.3 Technological characteristics |
| 20 | 8.4 Test methods 8.4.1 General 8.4.2 Magnetic properties 8.4.3 Geometrical characteristics and tolerances 8.4.4 Technological characteristics |
| 21 | 8.5 Retests 9 Marking, labelling and packaging 10 Complaints 11 Information to be supplied by the purchaser |
| 23 | Bibliography |
