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IEC 60404-9 Ed. 2.0 b: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.

Content Provider
International Electrotechnical Commission [iec]

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