IEC 60404-8-10:2009

FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Designation
6 General requirements
   6.1 Production process
   6.2 Form of supply
       6.2.1 Strip
       6.2.2 Sheet and plate
       6.2.3 Flats and bars
       6.2.4 Wire rod and wire
   6.3 Delivery condition and state
   6.4 Surface condition
7 Technical requirements
   7.1 Magnetic properties
   7.2 Geometric characteristics and tolerances
       7.2.1 Thickness of flat products
       7.2.2 Diameter or side dimension of long products
       7.2.3 Width of flat products
       7.2.4 Flatness (wave factor) of flat products
       7.2.5 Length
       7.2.6 Edge camber for flat products
       7.2.7 Straightness of hot-rolled flats and bars
8 Inspection
   8.1 General
   8.2 Selection of samples
       8.2.1 General
       8.2.2 Flat products
       8.2.3 Long products
       8.2.4 Wire rod and wire
   8.3 Preparation of test specimens
       8.3.1 Coercivity
       8.3.2 Geometrical characteristics and tolerances
   8.4 Test methods
       8.4.1 General
       8.4.2 Coercivity
       8.4.3 Thickness of flat products
       8.4.4 Width of flat products
       8.4.5 Flatness (wave factor) of flat products
       8.4.6 Edge camber of flat products
       8.4.7 Dimensions of long products
       8.4.8 Straightness of long products
       8.4.9 Retest
9 Complaints
10 Ordering information
Bibliography

IEC 60404-8-10:2009 specifies the general requirements, magnetic properties, geometric characteristics and tolerances as well as inspection procedures for magnetic materials used primarily for relays. This standard applies to pure iron, non-alloyed and alloyed steel and ferritic stainless steel products usually delivered in either the semi-processed or fully-processed state. These materials correspond to classes A, B, C and D.3 of IEC 60404-1. This second edition cancels and replaces the first edition published in 1994 and constitutes a technical revision. The main modifications from the previous edition of the standard are as follows:
- introduction of the ferritic stainless steels and the fully-processed state in the scope of the standard (see Clause 1);
- modification of the designation with the letter R at the beginning and the condition and state at the end (see Clause 5);
- introduction of the new grades R160 and R320 (see Table 2);
- modification of the requirements for the heat treatment of test specimens for semi-processed material (see Subclause 8.3.1);
- indication in Bibliography of standards referred to in this standard as an information.