IEC 60404-9 Ed. 2.0 b:2018

IEC 60404-9 Ed. 2.0 b: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.