FprEN 10265

SLOVENSKI STANDARD
01-februar-2024
Magnetni materiali - Specifikacija električnih jeklenih trakov in pločevin s
specifičnimi mehanskimi lastnostmi in magnetno polarizacijo
Magnetics materials - Specification for electrical steel strip and sheet with specified
mechanical properties and magnetic polarisation
Magnetische Werkstoffe - Anforderungen an Elektroband und -blech mit festgelegten
mechanischen Eigenschaften und magnetischer Polarisation
Matériaux magnétiques - Spécification pour les bandes et tôles en acier électrique à
caractéristiques mécaniques et polarisation magnétique spécifiées
Ta slovenski standard je istoveten z: prEN 10265
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
prEN 10265
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2023
ICS 77.140.50 Will supersede EN 10265:1995
English Version
Magnetics materials - Specification for electrical steel strip
and sheet with specified mechanical properties and
magnetic polarisation
Matériaux magnétiques - Spécification pour les bandes Magnetische Werkstoffe - Anforderungen an
et tôles en acier électrique à caractéristiques Elektroband und -blech mit festgelegten mechanischen
mécaniques et polarisation magnétique spécifiées Eigenschaften und magnetischer Polarisation
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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 10265:2023 E
worldwide for CEN national Members.

prEN 10265:2023 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Classification. 6
5 Designation . 6
6 General requirements . 7
6.1 Production process . 7
6.2 Form of supply . 7
6.3 Delivery condition . 7
6.4 Surface condition . 7
6.5 Suitability for cutting . 8
6.6 Suitability for welding. 8
7 Technical requirements . 8
7.1 Mechanical properties . 8
7.2 Magnetic properties . 8
7.3 Geometrical characteristics and tolerances . 10
7.3.1 Thickness . 10
7.3.2 Width . 12
7.3.3 Length . 13
7.3.4 Edge wave (wave factor). 14
7.3.5 Residual curvature . 14
7.3.6 Edge camber . 15
7.4 Density. 15
8 Inspection . 15
8.1 General . 15
8.2 Selection of samples . 15
8.3 Preparation of test specimens . 16
8.3.1 Mechanical properties . 16
8.3.2 Magnetic properties . 16
8.3.3 Geometrical characteristics and tolerances . 17
8.4 Test method . 17
8.4.1 General . 17
8.4.2 Mechanical properties . 17
8.4.3 Magnetic polarization . 17
8.4.4 Geometrical characteristics and tolerances . 17
8.5 Retests . 17
9 Marking, labelling and packaging . 18
10 Complaints . 18
11 Information to be supplied by the purchaser . 18
Bibliography . 19
prEN 10265:2023 (E)
European foreword
This document (prEN 10265:2023) 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 10265:1995.
In comparison with the previous edition EN 10265:1995, the following technical modifications have been
made:
— the title of the document has been amended;
— to take into account the revision of the geometrical characterisation of FprEN 10251;
— to include the residual curvature for sheets regarding the internal coil diameter for hot-rolled grades;
— to clarify in the surface condition text how precautions against oxidation can be taken;
— to include in the technical requirements too higher strength new cold-rolled grades;
— to rationalize the tables in the geometrical characteristics and tolerances;
— to clarify the density to be used for the magnetic measurements;
— to reduce the minimum number of Epstein test strips for the magnetic property measurement;
— to add a paragraph on the marking, labelling and packaging;
— to add a clarification on the information to be supplied by the purchaser.

prEN 10265:2023 (E)
1 Scope
This document defines the grades of electrical steel strip and sheet with specified mechanical properties
and magnetic polarization. It specifies general requirements, mechanical properties, magnetic
polarization, geometric characteristics, tolerances and technological characteristics, as well as inspection
procedures.
This document applies to electrical steel strip and sheet for the construction of poles and rims of rotating
electrical machines.
The grades are grouped into two classes according to their manufacturing process:
— hot-rolled grades;
— cold-rolled grades.
NOTE These materials correspond to EN 60404-1:2017, D.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 10021, General technical delivery conditions for steel products
EN 10027-2, Designation systems for steels — Part 2: Numerical system
EN 10204, Metallic products — Types of inspection documents
FprEN 10251:2023, Magnetic materials — Methods of determination of the geometrical characteristics of
electrical steel sheet and strip
EN 60404-2, Magnetic materials — Part 2: Methods of measurement of the magnetic properties of electrical
steel strip and sheet by means of an Epstein frame
EN 60404-4, Magnetic materials — Part 4: Methods of measurement of d.c. magnetic properties of
magnetically soft materials
EN ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
(ISO 6892-1)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
prEN 10265:2023 (E)
3.1
edge wave
wave factor
variation of flatness of a length of strip or sheet taking a form of waves at the slit edge of the product after
longitudinal side trimming or slitting of the product; characterised by the wave factor, i.e. by the relation
of the height of the wave to its length
Note 1 to entry: For examples of waves, see Figure 1.
[SOURCE: FprEN 10251:2023, definition 3.1]

Key
1 flat surface  h height of wave (mm)
2 sheet  l length of wave (mm)
3 rolling direction
Figure 1 — Example of wave
3.2
residual curvature
variations of flatness of a length of unwound strip or a sheet taking a permanent curvature in the direction
of rolling of the product
[SOURCE: FprEN 10251:2023, definition 3.2]
3.3
edge camber
greatest distance between a longitudinal edge of a length of strip or a sheet and the line joining the two
extremities of the measured length of this edge
Note 1 to entry: See Figure 2.
[SOURCE: FprEN 10251:2023, definition 3.3]
prEN 10265:2023 (E)
Figure 2 — Verification of the edge camber
4 Classification
The grades covered by this document are classified according to the specified value of the minimum proof
strength R , in MPa , according to the specified value of the minimum magnetic polarization at a DC
p0,2
magnetic field strength of 15 000 A/m, in T, and according to the nominal thickness of the product ,
in mm.
The grades are classified in two groups according to their manufacturing process: hot-rolled materials
and cold-rolled materials.
5 Designation
5.1 The conventional design
...