Magnetic materials - Part 13: Methods of measurement of density, resistivity and stacking factor of electrical steel sheet and strip

Specifies the methods used for determining the density, resistivity and stacking factor of electrical steel sheet and strip. These quantities are necessary to establish the magnetic characteristics of the material.

Magnetische Werkstoffe - Teil 13: Prüfverfahren zur Messung der Dichte, des spezifischen Widerstandes und des Stapelfaktors von Elektroblech und -band

Matériaux magnétiques - Partie 13: Méthodes de mesure de la masse volumique, de la résistivité et du facteur de foisonnement des tôles et bandes magnétiques

Spécifie les méthodes utilisées pour déterminer la masse volumique, la résistivité, et le facteur de foisonnement des tôles et bandes magnétiques. Ces grandeurs sont nécessaires pour établir les caractéristiques magnétiques du matériau.

Magnetni materiali - 13. del: Metode za meritve gostote, upornosti in skladnega faktorja električne pločevine in trakov (IEC 60404-13:1995)

General Information

Status
Withdrawn
Publication Date
11-Oct-2007
Drafting Committee
Parallel Committee
Current Stage
9960 - Withdrawal effective - Withdrawal
Start Date
14-Aug-2021
Completion Date
14-Aug-2021

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SLOVENSKI STANDARD
SIST EN 60404-13:2008
01-januar-2008
0DJQHWQLPDWHULDOLGHO0HWRGH]DPHULWYHJRVWRWHXSRUQRVWLLQVNODGQHJD
IDNWRUMDHOHNWULþQHSORþHYLQHLQWUDNRY ,(&
Magnetic materials - Part 13: Methods of measurement of density, resistivity and
stacking factor of electrical steel sheet and strip (IEC 60404-13:1995)
Magnetische Werkstoffe - Teil 13: Prüfverfahren zur Messung der Dichte, des
spezifischen Widerstandes und des Stapelfaktors von Elektroblech und -band (IEC
60404-13:1995)

Matériaux magnétiques - Partie 13: Méthodes de mesure de la masse volumique, de la

résistivité et du facteur de foisonnement des tôles et bandes magnétiques (IEC 60404-

13:1995)
Ta slovenski standard je istoveten z: EN 60404-13:2007
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
29.030 Magnetni materiali Magnetic materials
SIST EN 60404-13:2008 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 60404-13
NORME EUROPÉENNE
October 2007
EUROPÄISCHE NORM
ICS 17.220.20; 29.030
English version
Magnetic materials -
Part 13: Methods of measurement of density, resistivity
and stacking factor of electrical steel sheet and strip
(IEC 60404-13:1995)
Matériaux magnétiques - Magnetische Werkstoffe -
Partie 13: Méthodes de mesure Teil 13: Prüfverfahren zur Messung der
de la masse volumique, de la résistivité
Dichte, des spezifischen Widerstandes
et du facteur de foisonnement des tôles und des Stapelfaktors von Elektroblech
et bandes magnétiques und -band
(CEI 60404-13:1995) (IEC 60404-13:1995)

This European Standard was approved by CENELEC on 2007-10-01. CENELEC 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.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on

application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CENELEC member into its own language and notified

to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the

Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,

Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60404-13:2007 E
---------------------- Page: 2 ----------------------
EN 60404-13:2007 – 2 –
Foreword

The text of the International Standard IEC 60404-13:1995, prepared by IEC TC 68, Magnetic alloys and

steels, was submitted to the Unique Acceptance Procedure and was approved by CENELEC as

EN 60404-13 on 2007-10-01 without any modification.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-10-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-10-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice

The text of the International Standard IEC 60404-13:1995 was approved by CENELEC as a European

Standard without any modification.
__________
---------------------- Page: 3 ----------------------
– 3 – EN 60404-13:2007
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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.

NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.
Publication Year Title EN/HD Year
IEC 60404-2 1996 Magnetic materials - EN 60404-2 1998
Part 2: Methods of measurement of the
magnetic properties of electrical steel sheet and
strip by means of an Epstein frame
IEC 60404-3 1992 Magnetic materials - – –
Part 3: Methods of measurement of the
magnetic properties of magnetic sheet and strip
by means of a single sheet tester
IEC 60404-10 1988 Magnetic materials - – –
Part 10: Methods of measurement of magnetic
properties of magnetic steel sheet and strip at
medium frequencies

ISO 1183 Series Plastics - Methods for determining the density EN ISO 1183 Series

of non-cellular plastics
ISO 2738 1999 Sintered metal materials, excluding hard EN ISO 2738 1999
metals - Permeable sintered metal materials -
Determination of density, oil content, and open
porosity
---------------------- Page: 4 ----------------------
C E I
NORME
IEC
INTERNATIONALE
404-13
INTERNATIONAL
Première édition
STANDARD
First edition
1995-09
Matériaux magnétiques -
Partie 13:
Méthodes de mesure de la masse volumique,
de la résistivité et du facteur de foisonnement
des tôles et bandes magnétiques
Magnetic materials -
Part 13:
Methods of measurement of density, resistivity and
stacking factor of electrical steel sheet and strip
© CEI 1995 Droits de reproduction réservés — Copyright — all rights reserved

Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in

utilisée sous quelque forme que ce soit et par aucun pro- any form or by any means, electronic or mechanical,

rofilm, without permission

cédé, électronique ou mécanique, y compris la photocopie et including photocopying and mic

les microfilms, sans l'accord écrit de l'éditeur. in writing from the publisher.

Bureau Central de la Commission Electrotechnique Internationale 3, rue de Varembè Genève, Suisse

Commission Electrotechnique Internationale CODE PRIX
International Electrotechnical Commission
PRICE CODE P
IEC MerkayHapoaHaR 3nellrporexHHVecnafa liomuccmR
Pour prix, voir catalogue en vigueur
• •
For price, see current catalogue
---------------------- Page: 5 ----------------------
404-13 © IEC:1995 - 3 -
CONTENTS
Page
FOREWORD 5
Clause
1 Scope and object 7
2 Normative references 7
3 Determination of the density 9
3.1 Field of application 9
3.2 Test specimens 9
3.2.1 Strip specimens 9
9
3.2.2 Sheet specimens
11 3.3 Principles of measurement
11 3.3.1 General
using Epstein strips
3.3.2 Method of measuring the product
13 (method A)
using sheet specimens
3.3.3 Method of measuring the product em •p
15 (method B)
17
3.4 Apparatus
17 3.4.1 Requirements for methods A and B
17
3.4.2 Requirements for method A
17 3.4.3 Requirements for method B
19
3.5 Procedure
19
3.5.1 General
19
3.5.2 Procedure with strip specimens (method A)
21
3.5.3 Procedure with sheet specimens (method B)
21
3.5.4 Determination of the density
21
3.6 Test report
23
3.7 Reproducibility
23
4 Determination of the resistivity
23
4.1 Object
23 4.2 Field of application
23 4.3 Test specimen
23 4.4 Principle of measurement
24
4.4.1 Method based on the determination of the product e m p
23
d 4.4.2 Method based on the determination of thickness
25
4.5 Test report
27
4.6 Reproducibility
27
5 Determination of the stacking factor
27
5.1 Object
27 5.2 Field of application
27 5.3 Measuring procedure
5.4 Test report 29
5.5 Reproducibility 29
30
Annex A - Bibliography
---------------------- Page: 6 ----------------------
404-13 ©IEC:1995 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
MAGNETIC MATERIALS -
Part 13: Methods of measurement of density, resistivity and
stacking factor of electrical steel sheet and strip
FOREWORD

The IEC (International Electrotechnical Commission) is a worldwide organization for standardization

comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to

promote international cooperation on all questions concerning standardization in the electrical and

electronic fields. To this end and in addition to other activities, the IEC publishes International Standards.

Their preparation is entrusted to technical committees; any IEC National Committee interested in

the subject dealt with may participate in this preparatory work. International, governmental and

non-governmental organizations liaising with the IEC also participate in this preparation. The IEC

collaborates closely with the International Organization for Standardization (ISO) in accordance with

conditions determined by agreement between the two organizations.

2) The formal decisions or agreements of the IEC on technical matters, prepared by technical committees on

which all the National Committees having a special interest therein are represented, express, as nearly as

possible, an international consensus of opinion on the subjects dealt with.

They have the form of recommendations for international use published in the form of standards, technical

reports or guides and they are accepted by the National Committees in that sense.

4) In order to promote international unification, IEC National Committees undertake to apply IEC International

Standards transparently to the maximum extent possible in their national and regional standards. Any

divergence between the IEC Standard and the corresponding national or regional standard shall be clearly

indicated in the latter.

International Standard IEC 404-13 has been prepared by IEC technical committee 68:

Magnetic alloys and steels.

This standard supersedes chapters VI, VII and IX of IEC 404-2: 1978 which will shortly be

revised to include only magnetic measurements.
The text of this standard is based on the following documents:
Report on voting
DIS
68/110/DIS 68/121/RVD

Full information on the voting for the approval of this standard can be found in the report

on voting indicated in the above table.
Annex A is for information only.
---------------------- Page: 7 ----------------------
7 –,
404-13 © I EC:1995 –
MAGNETIC MATERIALS -
Part 13: Methods of measurement of density, resistivity and
stacking factor of electrical steel sheet and strip
1 Scope and object
of IEC 404 specifies the methods used for determining the density, resistivity
This part

and stacking factor of electrical steel sheet and strip. These quantities are necessary to

rticular, the density is
establish the magnetic characteristics of the material. In pa

necessary to allow specified values of the flux density to be set without knowing the thick-

ness of the test specimen.

For the determination of the density, the immersion method was earlier considered to be

a fundamental method for use in cases of arbitration. However, experience has shown

that this method is very difficult to use in the case of sheet samples with a relatively

large surface area. This method is therefore not included. It is described in ISO 2738 and

ISO 1183.
2 Normative references

The following normative documents contain provisions which, through reference in this

of IEC 404. At the time of publication, the editions
text, constitute provisions of this pa rt
ies to
indicated were valid. All normative documents are subject to revision, and pa rt
of IEC 404 are encouraged to investigate the possibility of
agreements based on this part

applying the most recent editions of the normative documents indicated below. Members.

of IEC and ISO maintain registers of currently valid International Standards.
Magnetic materials – Part 2: Methods of measurement of magnetic,
IEC 404-2: 1978,
electrical and physical properties of magnetic sheet and strip
Magnetic materials – Part 3: Methods of measurement of magnetic
IEC 404-3: 1992,
properties of magnetic sheet and strip by means of a single sheet tester
Magnetic materials – Part 10: Methods of measurement of magnetic
IEC 404-10: 1988,
properties of magnetic steel sheet and strip at medium frequencies
Plastics – Methods for determining the density and relative density of
ISO 1183: 1987,
non-cellular plastics
Permeable sintered metal materials – Determination of density, oil
ISO 2738: 1987,
content and open porosity
---------------------- Page: 8 ----------------------
- 9 -
404-13 ©IEC:1995
3 Determination of the density
3.1 Field of application

The method of measurement of the density defined in this clause applies only to non-

oriented iron-silicon electrical sheet and strip with or without insulation, with the following

range of chemical composition by mass:
silicon: p(Si) 5.4 %;
_ 0;
aluminium: 0,17 p(Si) - 0,28 _< p(Al) s 0,17 p(Si) + 0,28 and p(AI)>
0,4 %
total of other alloy constituents: p <_
where
p(Si) is the percentage of Si by mass;
p(AI) is the percentage of Al by mass.

NOTE — If the chemical composition is not known, it should be verified before using this method.

The two methods of determination of density described in this standard are applicable to

Epstein strips (method A) as specified by IEC 404-2 and IEC 404-10 and to sheets
(method B) as specified by IEC 404-3.

For materials not meeting the above range of chemical composition, immersion methods

of equivalent accuracy such as those defined in ISO 2738 or ISO 1183 shall be used.

The measurements shall be made at an ambient temperature of (23 ± 5) °C.
3.2 Test specimens
3.2.1 Strip specimens

The strip specimen used in method A (see 3.3.2) shall have the following dimensions:

- width (30 ± 0,2) mm;
b =
- length 280 mm <_ 1 <_ 320 mm.
It shall be cut with its longitudinal axis parallel to the direction of rolling.

It is not necessary to remove the oxide or other insulating coating except from places

where electrical contacts are made.
3.2.2 Sheet specimens
The dimensions of the sheet used for method B (see 3.3.3) shall be as follows:
- width b = 500 mm;
- length 1 = 500 mm.
---------------------- Page: 9 ----------------------
- 11 -
404-13 ©IEC:1995

These are the usual dimensions of a non-oriented test specimen for use in a single-sheet

tester (SST) conforming with lEC 404-3. However, the dimensions of the rectangular

sheets can vary within:
5 l 600 mm
<_ <_ 510 mm and 500 mm
300 mm b
Principles of measurement
3.3
3.3.1 General
em, and
In the case of magnetic material as specified in clause 3, both the density,
are functions of the silicon and aluminium contents. Experience has
the resistivity, p,
and the easy-to-measure product em•p
shown that the relationship between the density

(see 3.3.2 and 3.3.3) is a simple, almost linear one, as shown in figure 1. Thus, it is possible

to determine the density by substituting its direct measurement by the measurement of the

product em•p.

The linear function shown in figure 1, obtained by linear regression from experimental

data, follows the empirical relation:
eo (1)
ks•em•P
ern
where
ks = 89 200 (O . m)m)-1;-1 ;
is the density, in kilograms per cubic metre;
a = 7 973 . kg-m-3;
p is the resistivity, in ohm metres.
7,90
7,80
7,70
7,60
7,50
400 500
200 300 0 100
em 10-5S2kg
m 2
!EC 824!95
em -p, for alloyed
m as a function of the product
Figure 1 - Density e
electrical sheet steel
---------------------- Page: 10 ----------------------
– 13 –
404-13 ©IEC:1995

This relationship has been established by careful and statistical application of the im-

mersion method [1]* taking the usual impurities of non-oriented material into account.

For the two different types of test specimen used for the Epstein and single-sheet test

e m •p are applied,
(SST) method, respectively, two methods of determination of the product
described in 3.3.2 and 3.3.3.
•p using Epstein strips (method A)
Method of measuring the product em
3.3.2
of a

If an electric current flows homogeneously through the test specimen the resistance

length of an Epstein strip between two point contacts can be easily measured.
The relationships
p 1e
R _
b-d
m = 1 - b• cl-
and
R-m
give
em p
1e•l
where
is the width of the test specimen, in metres;
is the thickness of the test specimen, in metres;
is the total length of the test specimen, in metres;

is the electrical path length (distance between the potential contacts), in metres;

m is the mass of the test specimen, in kilograms;
is the density of
...

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