IEC 60404-9:2018

Magnetic materials - Part 9: Methods of determination of the geometrical characteristics of electrical steel strip and sheet

IEC 60404-9:2018 specifies the measurement and test methods for the determination of the following geometrical characteristics of electrical steel strip and sheet:
– edge wave (wave factor);
– residual curvature;
– edge camber;
– deviation from the shearing line (internal stress);
– burr height.
This document applies to electrical steel strip and sheet intended for the construction of magnetic circuits and corresponding to Classes B2, C21, C22 and C23 of IEC 60404-1.
This edition includes the following significant technical changes with respect to the previous edition:
a. revision of terms and definitions;
b. specification of the length of test specimens for the determinations of edge wave (wave factor) and edge camber;
c. addition of the horizontal method for the determination of residual curvature, and a note that informs about a safety concern of the vertical method;
d. clarification that the burr height was characterized by the maximum value;
e. addition of the measuring procedure using a hand-held micrometer to determine the burr height.

Matériaux magnétiques - Partie 9: Méthodes de détermination des caractéristiques géométriques des bandes et tôles magnétiques en acier

L'IEC 60404-9:2018 spécifie les méthodes de mesure et d'essai pour la détermination des caractéristiques géométriques suivantes des bandes et tôles magnétiques en acier:
– onde de surface (facteur d'ondulation);
– courbure résiduelle;
– rectitude;
– écart par rapport à la ligne de cisaillage (contrainte interne);
- hauteur de bavure.
Le présent document s'applique aux bandes et tôles magnétiques en acier destinées à la construction de circuits magnétiques et correspondant aux Classes B2, C21, C22 et C23 de l'IEC 60404-1.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a. révision des termes et définitions;
b. spécification de la longueur des éprouvettes d'essai pour la détermination de l'onde de surface (facteur d'ondulation) et de la rectitude;
c. ajout de la méthode horizontale pour la détermination de la courbure résiduelle et une note informative sur une question de sécurité concernant la méthode verticale;
d. clarification sur le fait que la hauteur de bavure a été caractérisée par la valeur maximale;
e. ajout de la procédure de mesure à l'aide d'un micromètre manuel pour déterminer la hauteur de bavure.

General Information

• Status: Published
• Publication Date: 27-Nov-2018
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.030 - Magnetic materials
• ICS: 77.140.50 - Flat steel products and semi-products
• Technical Committee: TC 68 - Magnetic alloys and steels
• Drafting Committee: WG 2 - TC 68/WG 2
• Current Stage: PPUB - Publication issued
• Start Date: 24-Dec-2018
• Completion Date: 28-Nov-2018

Standards Content (Sample)

IEC 60404-9 ®
Edition 2.0 2018-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Magnetic materials –
Part 9: Methods of determination of the geometrical characteristics of electrical
steel strip and sheet
Matériaux magnétiques –
Partie 9: Méthodes de détermination des caractéristiques géométriques des
bandes et tôles magnétiques en acier

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IEC 60404-9 ®
Edition 2.0 2018-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Magnetic materials –
Part 9: Methods of determination of the geometrical characteristics of electrical

steel strip and sheet
Matériaux magnétiques –
Partie 9: Méthodes de détermination des caractéristiques géométriques des

bandes et tôles magnétiques en acier

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.030; 77.140.50 ISBN 978-2-8322-6296-2

– 2 – IEC 60404-9:2018 © IEC 2018
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Measurement and test methods . 6
4.1 Edge wave (wave factor) . 6
4.1.1 Test specimen . 6
4.1.2 Measuring procedure . 6
4.2 Residual curvature . 7
4.2.1 General . 7
4.2.2 Horizontal method . 8
4.2.3 Vertical method . 8
4.3 Edge camber . 9
4.3.1 Test specimen . 9
4.3.2 Measuring procedure . 9
4.4 Deviation from the shearing line (internal stress) . 10
4.4.1 Test specimen . 10
4.4.2 Measuring procedure . 10
4.5 Burr height . 11
4.5.1 Test specimen . 11
4.5.2 Measuring procedure . 11
5 Test report . 14
Annex A (informative) Examples of the clamping system . 15
Bibliography . 17

Figure 1 – Example of test specimen with edge waves placed on a surface plate . 7
Figure 2 – Verification of the wave factor (w) . 7
Figure 3 – Verification of the residual curvature (horizontal method) . 8
Figure 4 – Verification of the residual curvature (vertical method) . 9
Figure 5 – Verification of the edge camber . 10
Figure 6 – Verification of the deviation from the shearing line (internal stress) . 11
Figure 7 – Example of the burr height (h ) . 12
b
Figure 8 – Apparatus for measuring burr height using a linear measuring device . 13
Figure 9 – Position of the moving anvil . 13
Figure A.1 – An example of the clamping system (type A) . 15
Figure A.2 – An example of the clamping system (type B) . 16

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MAGNETIC MATERIALS –
Part 9: Methods of determination of the geometrical
characteristics of electrical steel strip and sheet

FOREWORD
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International Standard IEC 60404-9 has been prepared by IEC technical committee 68:
Magnetic alloys and steels.
This second edition cancels and replaces the first published in 1987. This edition constitutes
a technical revision.
This edition includes the following significant technical changes
...