prEN 10342
(Main)Magnetic materials - Classification of surface insulations of electrical steel sheet, strip and laminations
Magnetic materials - Classification of surface insulations of electrical steel sheet, strip and laminations
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 Clause 2).
Magnetische Werkstoffe - Einteilung der Isolationen auf Elektroblech und ‑band und daraus gefertigten Stanzteilen
In diesem Dokument wird eine Einteilung der Isolationen für Elektroblech und -band und daraus gefertigte Stanzteile vorgenommen. Diese Einteilung erfolgt auf Grundlage der allgemeinen chemischen Zusammensetzung der Isolationen, der relativen Isolierfähigkeit sowie des Einsatzgebietes.
Diese Isolationen sind entweder Oxidschichten oder aufgetragene Beschichtungen.
Zweck dieser Einteilung ist, eine Nomenklatur für verschiedene Isolationstypen zu schaffen und den Anwender durch die Bereitstellung allgemeiner Informationen über die chemische Zusammensetzung und Einsatzmöglichkeiten bei der Auswahl der Isolationen zu unterstützen.
Diese Einteilung hat nicht zum Ziel, für die Isolationsanforderungen spezifische Werte zum Isolations-widerstand festzulegen. Gegebenenfalls müssen diese Anforderungen zwischen dem Besteller und dem Stahl¬hersteller vereinbart werden.
Die Einteilung ist in Verbindung mit den verschiedenen Normen für kaltgewalztes Elektroblech und -band (siehe Abschnitt 2) zu nutzen.
Matériaux magnétiques - Classification des isolations de surface des tôles, bandes et lamelles magnétiques en acier
Le présent document établit une classification des isolations de surface des tôles, bandes et lamelles en acier électrique en fonction de leur composition générale, leur aptitude relative à l'isolement et leur fonction.
Ces isolations de surface sont soit des couches d'oxyde soit des revêtements appliqués.
L'objectif de cette classification est de créer une nomenclature pour les différents types d'isolations de surface et d'aider les utilisateurs d'isolations de surface en fournissant des informations générales sur la nature chimique et l'utilisation des isolations de surface.
L'intention de cette classification n'est pas de spécifier des exigences relatives à l'isolation en termes de valeurs spécifiques de résistance d’isolation de surface. De telles exigences sont à convenir entre l'acheteur et le producteur d'acier, le cas échéant.
La classification est à utiliser conjointement avec les diverses spécifications pour les aciers électriques laminés à froid (voir l'Article 2).
Magnetni materiali - Klasifikacija površinskih izolacij elektropločevine, trakov in laminatov
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2024
Magnetni materiali - Klasifikacija površinskih izolacij elektropločevine, trakov in
laminatov
Magnetic materials - Classification of surface insulations of electrical steel sheet, strip
and laminations
Magnetische Werkstoffe - Einteilung der Isolationen auf Elektroblech und ‑band und
daraus gefertigten Stanzteilen
Matériaux magnétiques - Classification des isolations de surface des tôles, bandes et
lamelles magnétiques en acier
Ta slovenski standard je istoveten z: prEN 10342
ICS:
29.030 Magnetni materiali Magnetic materials
77.140.50 Ploščati jekleni izdelki in Flat steel products and semi-
polizdelki products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2024
ICS 29.030 Will supersede EN 10342:2005
English Version
Magnetic materials - Classification of surface insulations of
electrical steel sheet, strip and laminations
Matériaux magnétiques - Classification des isolations Magnetische Werkstoffe - Einteilung der Isolationen
de surface des tôles, bandes et lamelles magnétiques en auf Elektroblech und -band und daraus gefertigten
acier Stanzteilen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 459/SC 8.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 10342:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Classification of surface insulations of electrical steel, strip and laminations . 4
European foreword
This document (prEN 10342:2024) has been prepared by Technical Committee CEN/TC 459/SC 8 “Steel
sheet and strip for electrical applications”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 10342:2005.
— the normative references have been updated;
— in Table 1, insulation designation EC-3-B has been added.
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 Clause 2).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 10106, Cold rolled non-oriented electrical steel strip and sheet delivered in the fully processed state
EN 10107, Grain-oriented electrical steel sheet and strip delivered in the fully processed state
EN 10265, Magnetic materials — Specification for steel sheet and strip with specified mechanical
properties and magnetic permeability
EN 10303, Thin magnetic steel strip and sheet for use at medium frequencies
EN 10341, Cold rolled electrical non-alloy and alloy steel sheet and strip delivered in the semi-processed
state
EN 60404-11, Magnetic materials — Methods of measurement of the surface insulation resistance of
electrical steel strip and sheet
IEC 60050-221, International Electrotechnical Vocabulary — Chapter 221: Magnetic materials and
components
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-221 and in EN 10106,
EN 10107, EN 10341, EN 10265, EN 60404-11 and EN 10303 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
4 Classification of surface insulations of electrical steel, strip and laminations
Table 1 specifies the classification of surface insulations of electrical steel sheet, strip and laminations.
Table 1 — Classification of surface insulation of electrical steel, strip and laminations
Insulation
Insulation description – Characteristics – Typical application, limits of use
designation
EC-0 An oxide layer that is formed naturally on the steel surface during electrical steel
manufacture. This oxide layer is thin, tightly adherent and provides sufficient surface
insulation resistance for many types of small cores.
This oxide layer will withstand normal stress relief annealing temperatures.
If subjected to a user’s anneal after stamping, the surface insulation resistance of this
oxide layer may be affected by the oxidizing potential of the anneal.
a
It is not appropriate to specify the surface insulation resistance for this type of
insulation.
EC-1 An oxide layer that is created on the surface of the steel laminations by contact with an
oxidizing furna
...
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