SIST EN 10265:2025

SLOVENSKI STANDARD
01-februar-2025
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: EN 10265:2024
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.

EN 10265
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2024
EUROPÄISCHE NORM
ICS 77.140.50 Supersedes 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 European Standard was approved by CEN on 27 October 2024.

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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
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 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.
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. EN 10265:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Classification. 7
5 Designation . 7
6 General requirements . 8
6.1 Production process . 8
6.2 Form of supply . 8
6.3 Delivery condition . 8
6.4 Surface condition . 9
6.5 Suitability for cutting . 9
6.6 Suitability for welding . 9
7 Technical requirements . 9
7.1 Mechanical properties . 9
7.2 Magnetic properties . 9
7.3 Geometrical characteristics and tolerances. 11
7.3.1 Thickness . 11
7.3.2 Width . 13
7.3.3 Length. 14
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
European foreword
This document (EN 10265:2024) 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 European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2025, and conflicting national standards shall be
withdrawn at the latest by May 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes 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 characterization of EN 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.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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 the United
Kingdom.
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
EN 10251:2024, 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 (IEC 60404-2)
EN 60404-4, Magnetic materials — Part 4: Methods of measurement of d.c. magnetic properties of
magnetically soft materials (IEC 60404-4)
EN IEC 60404-13, Magnetic materials — Part 13: Methods of measurement of resistivity, density and
stacking factor of electrical steel strip and sheet (IEC 60404-13)
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
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: EN 10251:2024, 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: EN 10251:2024, 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: EN 10251:2024, definition 3.3]
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 designation of the different grades comprises the following in the order given:
1) the specified minimum value of the minimum proof strength R , in MPa;
p0,2
2) one hundred times the nominal thickness of the product, in millimetres;
3) the characteristic letters:
a) “TG” for hot-rolled grades;
b) “TF” for cold-rolled grades;
4) one hundred times the specified value of minimum magnetic polarization at a DC magnetic field
strength of 15 000 A/m, in T.
EXAMPLE 350-100-TF 181 for a cold-rolled electrical steel strip and sheet with a minimum proof strength
R of 350 MPa, a nominal thickness of 1,0 mm, and a minimum magnetic polarization 1,81 T at a DC magnetic
p0,2
field strength of 15 000 A/m.
1 MPa = 1 N/mm².
In the rest of the document, the word “product” is used to mean “strip and sheet”.
5.2 The numerical designation shall be in accordance with EN 10027-2.
6 General requirements
6.1 Production process
The production process of the steels and its chemical composition are left to the discretion of the
manufacturer.
6.2 Form of supply
The material is supplied in coils in the case of strip and in bundles in the case of sheets.
The mass of the coils or bundles of sheets shall be agreed between the manufacturer and the purchaser
at the time of enquiry and order.
The internal diameter of coils shall be agreed between the manufacturer and the purchaser at the time of
enquiry and order. The recommended value for the internal diameter of coils is approximately 760 mm
or 610 mm for hot-rolled grades, and approximately 508 mm for cold-rolled grades.
Strip shall be of constant width and wound in such a manner that the edges are superimposed in a regular
manner and the side faces of the coil are substantially flat.
Coils shall be sufficiently tightly wound in order that they do not collapse under their own weight, strip
may exhibit welds or interleaves resulting from the removal of defective zones or from the joining of
several lengths to obtain the sizes of the coils required by the purchaser at the time of enquiry and order.
If necessary, the marking of welds or interleaves may be agreed between the manufacturer and the
purchaser at the time of enquiry and order.
For coils containing repair welds or interleaves, each part of the strip shall be of the same grade.
The edges of parts welded together shall not be so much out of alignment as to affect the further
processing of the product.
Sheets which make up each bundle shall be stacked so that the side faces are substantially flat and
approximately perpendicular to the top face.
Products supplied in sheets shall not contain any welds.
6.3 Delivery condition
The product is normally supplied without insulation. By agreement between the purchaser at the time of
enquiry and order, the product may be supplied with insulation on one or both sides. If the product is
supplied with insulation, the nature of the insulation, its properties and their verification shall be agreed
between the manufacturer and the purchaser at the time of enquiry and order.
Hot-rolling grades are normally supplied with an oxide scale layer unless they have been ordered pickled.
The product may be supplied lightly coated with temporary corrosion protection film by agreement
between the manufacturer and the purchaser at the time of enquiry and order.
Coils supplied with trimmed edges and sheets shall not contain excessive burrs or cutting distortions
which are prejudicial to the method of working of the product.
6.4 Surface condition
The surfaces shall be smooth and clean free from grease and rust . Dispersed defects such as scratches,
blisters, cracks, etc. are only permitted if they are within the limits of the tolerance on thickness and if
they are not detrimental to the correct use of the supplied product.
In the case of a “TF” type product, supplied with an insulating coating, further care needs to be taken to
avoid condensation on the edge, which can lead to an oxidation of these edges.
6.5 Suitability for cutting
The product shall be able to be cut or punched without causing premature wear of tools. The product
shall be suitable for cutting or punching accurately into the usual shapes at any point when app
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