1 Scope
This document establishes a classification of surface insulations for electrical steel
sheet, strip and laminations according to their general composition, relative insulating
ability and function.
These surface insulations are either oxide layers or applied coatings.
The purpose of this classification is to create a nomenclature for the various types
of surface insulations and to assist users of surface insulations by providing general
information about the chemical nature and use of the surface insulations.
It is not the intent of this classification to specify insulation requirements in
terms of specific values of surface insulation resistance. Such requirements are to
be agreed between the purchaser and the steel producer, where applicable.
The classification is to be used in conjunction with the various specifications for
cold rolled electrical steels (see the European Standards listed in Clause 2).