SIST EN IEC 60893-2:2024
(Main)Insulating materials - Industrial rigid laminated sheets based on thermosetting resins for electrical purposes - Part 2: Methods of test (IEC 60893-2:2023)
Insulating materials - Industrial rigid laminated sheets based on thermosetting resins for electrical purposes - Part 2: Methods of test (IEC 60893-2:2023)
IEC 60893-2:2023 is available as IEC 60893-2:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60893-2:2023 describes methods of test for the materials defined in IEC 60893-1 (referred to also as Part 1). This third edition cancels and replaces the second edition published in 2003. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) removal of reference to withdrawn specification IEC 60167:1964;
b) inclusion of reference to IEC 62631-3-3:2015, which supersedes IEC 60167:1964. Details in 6.3 have been updated accordingly. The actual performance of the test has not changed;
c) normative references have been updated.
Stratifiés industriels rigides en planches à base de résines thermodurcissables à usages électriques - Partie 2: Méthodes d'essai (IEC 60893-2:2023)
Stratifiés industriels rigides en planches à base de résines thermodurcissables à usages électriques - Partie 2: Méthodes d'essai (IEC 60893-2:2023)
IEC 60893-2:2023 est disponible sous forme de IEC 60893-2:2023 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 60893-2:2023 décrit les méthodes d'essai applicables aux matériaux définis dans l'IEC 60893-1 (également désignée sous le nom de Partie 1). Cette troisième édition annule et remplace la deuxième édition parue en 2003. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) la référence à la spécification IEC 60167:1964, qui a été annulée, a été supprimée;
b) des références à l'IEC 62631-3-3:2015, qui remplace l'IEC 60167:1964, ont été ajoutées. Le contenu du 6.3 a été mis à jour en conséquence. La procédure d'essai n'a pas changé;
c) les références normatives ont été mises à jour.
Izolacijski materiali - Industrijske toge laminirane plošče iz smol s toplotnim utrjevanjem za električne namene - 2. del: Preskusne metode (IEC 60893-2:2023)
Ta del standarda IEC 60893 opisuje preskusne metode za materiale, določene v standardu IEC 60893-1 (imenovan tudi 1. del).
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2024
Izolacijski materiali - Industrijske toge laminirane plošče iz smol s toplotnim
utrjevanjem za električne namene - 2. del: Preskusne metode (IEC 60893-2:2023)
Insulating materials - Industrial rigid laminated sheets based on thermosetting resins for
electrical purposes - Part 2: Methods of test (IEC 60893-2:2023)
Stratifiés industriels rigides en planches à base de résines thermodurcissables à usages
électriques - Partie 2: Méthodes d'essai (IEC 60893-2:2023)
Stratifiés industriels rigides en planches à base de résines thermodurcissables à usages
électriques - Partie 2: Méthodes d'essai (IEC 60893-2:2023)
Ta slovenski standard je istoveten z: EN IEC 60893-2:2023
ICS:
29.035.20 Plastični in gumeni izolacijski Plastics and rubber insulating
materiali materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 60893-2
NORME EUROPÉENNE
EUROPÄISCHE NORM December 2023
ICS 29.035.01 Supersedes EN 60893-2:2004
English Version
Insulating materials - Industrial rigid laminated sheets based on
thermosetting resins for electrical purposes - Part 2: Methods of
test
(IEC 60893-2:2023)
Matériaux isolants - Stratifiés industriels rigides en planches Isoliermaterialien - Industrielle starre Schichtstoffplatten auf
à base de résines thermodurcissables à usages électriques Basis duroplastischer Harze für elektrotechnische Zwecke -
- Partie 2: Méthodes d'essai Teil 2: Prüfverfahren
(IEC 60893-2:2023) (IEC 60893-2:2023)
This European Standard was approved by CENELEC on 2023-12-18. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60893-2:2023 E
European foreword
The text of document 15/1017/FDIS, future edition 3 of IEC 60893-2, prepared by IEC/TC 15 "Solid
electrical insulating materials" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 60893-2:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-09-18
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-12-18
document have to be withdrawn
This document supersedes EN 60893-2:2004 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60893-2:2023 was approved by CENELEC as a European
Standard without any modification.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60112 - Method for the determination of the proof EN IEC 60112 -
and the comparative tracking indices of
solid insulating materials
IEC 60212 2010 Standard conditions for use prior to and EN 60212 2011
during the testing of solid electrical
insulating materials
IEC 60216-1 2013 Electrical insulating materials - Thermal EN 60216-1 2013
endurance properties - Part 1: Ageing
procedures and evaluation of test results
IEC 60243-1 2013 Electric strength of insulating materials - EN 60243-1 2013
Test methods - Part 1: Tests at power
frequencies
IEC 60296 2012 Fluids for electrotechnical applications - EN 60296 2012
Unused mineral insulating oils for
transformers and switchgear
IEC 60587 2007 Electrical insulating materials used under EN 60587 2007
severe ambient conditions - Test methods
for evaluating resistance to tracking and
erosion
IEC 60695-11-10 2013 Fire hazard testing - Part 11-10: Test EN 60695-11-10 2013
flames - 50 W horizontal and vertical flame
test methods
IEC 60893-1 - Insulating materials - Industrial rigid EN 60893-1 -
laminated sheets based on thermosetting
resins for electrical purposes - Part 1:
Definitions, designations and general
requirements
IEC 60893-3 series Insulating materials - Industrial rigid EN 60893-3 series
laminated sheets based on thermosetting
resins for electrical purposes - Part 3:
Specifications for individual materials
IEC 62631-3-3 2015 Dielectric and resistive properties of solid EN 62631-3-3 2016
insulating materials - Part 3-3:
Determination of resistive properties (DC
methods) - Insulation resistance
IEC/TR 60893-4 - Insulating materials - Industrial rigid - -
laminated sheets based on thermosetting
resins for electrical purposes - Part 4:
Typical values
ISO 62 2008 Plastics - Determination of water EN ISO 62 2008
absorption
ISO 178 2010 Plastics - Determination of flexural EN ISO 178 2010
properties
ISO 179-1 2000 Plastics - Determination of Charpy impact EN ISO 179-1 2000
properties - Part 1: Non-instrumented
impact test
ISO 179-2 1997 Plastics - Determination of Charpy impact EN ISO 179-2 1999
properties - Part 2: Instrumented impact
test
ISO 180 2000 Plastics - Determination of Izod impact EN ISO 180 2000
strength
ISO 527-1 2012 Plastics - Determination of tensile EN ISO 527-1 2012
properties - Part 1: General principles
ISO 527-4 1997 Plastics - Determination of tensile EN ISO 527-4 1997
properties - Part 4: Test conditions for
isotropic and orthotropic fibre-reinforced
plastic composites
ISO 604 2002 Plastics - Determination of compressive EN ISO 604 2003
properties
ISO 1183-1 2012 Plastics - Methods for determining the EN ISO 1183-1 2012
density of non-cellular plastics - Part 1:
Immersion method, liquid pyknometer
method and titration method
ISO 3611 2010 Geometrical product specifications (GPS) - EN ISO 3611 2010
Dimensional measuring equipment:
Micrometers for external measurements -
Design and metrological characteristics
IEC 60893-2 ®
Edition 3.0 2023-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Insulating materials – Industrial rigid laminated sheets based on thermosetting
resins for electrical purposes –
Part 2: Methods of test
Matériaux isolants – Stratifiés industriels rigides en planches à base de résines
thermodurcissables à usages électriques –
Partie 2: Méthodes d'essai
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.035.01 ISBN 978-2-8322-7825-3
– 2 – IEC 60893-2:2023 © IEC 2023
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Conditioning of test specimens . 10
5 Dimensions. 10
5.1 Thickness . 10
5.1.1 General . 10
5.1.2 Test apparatus for reference method . 10
5.1.3 Procedure for reference method . 10
5.1.4 Results . 10
5.2 Flatness . 10
5.2.1 General . 10
5.2.2 Test specimens . 10
5.2.3 Test method . 11
5.2.4 Results . 11
6 Mechanical tests . 11
6.1 Flexural strength . 11
6.1.1 General . 11
6.1.2 Test specimens . 11
6.1.3 Test method . 11
6.1.4 Results . 11
6.2 Modulus of elasticity in flexure . 11
6.2.1 General . 11
6.2.2 Test specimens . 12
6.2.3 Test method . 12
6.2.4 Results . 12
6.3 Compressive strength . 12
6.3.1 General . 12
6.3.2 Test specimens . 12
6.3.3 Test method . 12
6.3.4 Results . 12
6.4 Impact strength . 12
6.4.1 General . 12
6.4.2 Charpy Impact strength . 12
6.4.3 Izod impact strength . 13
6.5 Shear strength parallel to laminations . 13
6.5.1 General . 13
6.5.2 Test specimens . 13
6.5.3 Test method . 14
6.5.4 Results . 14
6.6 Tensile strength . 14
6.6.1 General . 14
6.6.2 Test specimens . 14
6.6.3 Test method . 14
IEC 60893-2:2023 © IEC 2023 – 3 –
6.6.4 Results . 14
7 Electrical tests . 14
7.1 Electric strength and breakdown voltage . 14
7.1.1 General . 14
7.1.2 Test specimens . 15
7.1.3 Test method . 15
7.2 Permittivity and dissipation factor . 15
7.2.1 General requirements . 15
7.2.2 Methods . 16
7.2.3 Principles of the methods . 16
7.2.4 Measuring instruments. 17
7.2.5 Method A: Direct measurement technique . 17
7.2.6 Method B: Air substitution technique . 19
7.2.7 Method C: Two fluid immersion technique . 22
7.2.8 Test report . 25
7.3 Insulation resistance after immersion in water . 26
7.3.1 General . 26
7.3.2 Test specimens . 26
7.3.3 Test method . 26
7.3.4 Results . 26
7.4 Comparative and proof tracking indices . 26
7.4.1 General . 26
7.4.2 Test specimens . 26
7.4.3 Test method . 26
7.4.4 Results . 27
7.5 Tracking and erosion resistance . 27
7.5.1 General . 27
7.5.2 Test specimens . 27
7.5.3 Test method . 27
7.5.4 Results . 27
8 Thermal tests . 27
8.1 Thermal endurance . 27
8.1.1 General . 27
8.1.2 Test specimens . 27
8.1.3 Test method . 27
8.1.4 Results . 27
8.2 Flammability . 27
8.2.1 General . 27
8.2.2 Test specimens . 28
8.2.3 Test method . 28
8.2.4 Results . 28
9 Other tests . 28
9.1 Density . 28
9.1.1 General . 28
9.1.2 Test specimens . 28
9.1.3 Test method . 28
9.1.4 Results . 28
9.2 Water absorption . 28
9.2.1 General . 28
– 4 – IEC 60893-2:2023 © IEC 2023
9.2.2 Test specimens . 28
9.2.3 Test method . 28
9.2.4 Results . 28
Annex A (informative) Modes of representation of capacitance . 34
Annex B (informative) Liquids of known permittivity values . 35
Bibliography . 36
Figure 1 – Test specimens for impact strength test . 29
Figure 2 – Device for testing parallel shearing strength . 30
Figure 3 – Example of electrode system for method A . 31
Figure 4 – Example of electrode system for method B . 32
Figure 5 – Example of electrode system for method C . 33
Figure A.1 – Equivalent parallel and series representation of a capacitor . 34
Table 1 – Sequence employed for routine measurements . 24
Table B.1 – Liquids of know permittivity values . 35
IEC 60893-2:2023 © IEC 2023 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INSULATING MATERIALS –
INDUSTRIAL RIGID LAMINATED SHEETS
BASED ON THERMOSETTING RESINS
FOR ELECTRICAL PURPOSES –
Part 2: Methods of test
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). 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. 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 IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 60893-2 has been prepared by IEC technical committee 15: Solid electrical insulating
materials. It is an International Standard.
This third edition cancels and replaces the second edition published in 2003. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) removal of reference to withdrawn specification IEC 60167:1964;
– 6 – IEC 60893-2:2023 © IEC 2023
b) inclusion of reference to IEC 62631-3-3:2015, which supersedes IEC 60167:1964. Details
in 6.3 have been updated accordingly. The actual performance of the test has not changed;
c) normative references have been updated.
The text of this International Standard is based on the following documents:
Draft Report on voting
15/1017/FDIS 15/1023/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 60893 series, published under the general title Insulating materials
– Industrial rigid laminated sheets based on thermosetting resins for electrical purposes, can
be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
IEC 60893-2:2023 © IEC 2023 – 7 –
INTRODUCTION
This document is one of a series which deals with industrial rigid laminated sheets based on
thermosetting resins for electrical purposes.
This series consists of four parts:
• Part 1: Definitions, designations and general requirements (IEC 60893-1);
• Part 2: Methods of test (IEC 60893-2);
• Part 3: Specifications for individual materials (IEC 60893-3);
• Part 4: Typical values (IEC TR 60893-4).
– 8 – IEC 60893-2:2023 © IEC 2023
INSULATING MATERIALS –
INDUSTRIAL RIGID LAMINATED SHEETS
BASED ON THERMOSETTING RESINS
FOR ELECTRICAL PURPOSES –
Part 2: Methods of test
1 Scope
This part of IEC 60893 describes methods of test for the materials defined in IEC 60893-1
(referred to also as Part 1).
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.
IEC 60112, Method for the determination of the proof and the comparative tracking indices of
solid insulating materials
IEC 60212:2010, Standard conditions for use prior to and during the testing of solid electrical
insulating materials
IEC 60216-1:2013, Electrical insulating materials – Thermal endurance properties – Part 1:
Ageing procedures and evaluation of test results
IEC 60243-1:2013, Electric strength of insulating materials – Test methods – Part 1: Tests at
power frequencies
IEC 60296:2012 , Fluids for electrotechnical applications – Unused mineral insulating oils for
transformers and switchgear
IEC 60587:2007 , Electrical insulating materials used under severe ambient conditions – Test
methods for evaluating resistance to tracking and erosion
IEC 60695-11-10:2013, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and
vertical flame test methods
IEC 60893-1, Insulating materials – Industrial rigid laminated sheets based on thermosetting
resins for electrical purposes – Part 1: Definitions, designations and general requirements
IEC 60893-3 (all parts), Insulating materials – Industrial rigid laminated sheets based on
thermosetting resins for electrical purposes – Part 3: Specifications for individual materials
___________
A fifth edition of this standard has been published in 2020.
A fourth edition of this standard has been published in 2022.
IEC 60893-2:2023 © IEC 2023 – 9 –
IEC TR 60893-4, Insulating materials – Industrial rigid laminated sheets based on thermosetting
resins for electrical purposes – Part 4: Typical values
IEC 62631-3-3:2015, Dielectric and resistive properties of solid insulating materials – Part 3-3:
Determination of resistive properties (DC methods) – Insulation resistance
ISO 62:2008, Plastics – Determination of water absorption
ISO 178:2010 , Plastics – Determination of flexural properties
ISO 179-1:2000 , Plastics – Determination of Charpy impact properties – Part 1: Non-
instrumented impact test
ISO 179-2:1997 , Plastics – Determination of Charpy impact properties – Part 2: Instrumented
impact test
ISO 180:2000 , Plastics – Determination of Izod impact strength
ISO 527-1:2012 , Plastics – Determination of tensile properties – Part 1: General principles
ISO 527-4:1997 , Plastics – Determination of tensile properties – Part 4: Test conditions for
isotropic and orthotropic fibre-reinforced plastic composites
ISO 604:2002, Plastics – Determination of compressive properties
ISO 1183-1:2012 , Plastics – Methods for determining the density of non-cellular plastics –
Part 1: Immersion method, liquid pyknometer method and titration method
ISO 3611:2010 , Geometrical product specifications (GPS) – Dimensional measuring
equipment: Micrometers for external measurements – Design and metrological characteristics
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology 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
___________
A sixth edition of this standard has been published in 2019.
A third edition of this standard has been published in 2023.
A second edition of this standard has been published in 2020.
A fifth edition of this standard has been published in 2023.
A third edition of this standard has been published in 2019.
A third edition of this standard has been published in 2023.
A third edition of this standard has been published in 2019.
A third edition of this standard has been published in 2023.
– 10 – IEC 60893-2:2023 © IEC 2023
4 Conditioning of test specimens
Unless otherwise specified, test specimens shall be conditioned for at least 24 h in standard
atmosphere B according to IEC 60212:2010 (temperature 23 ± 2 °C, relative humidity
(50 ± 5) %).
Unless otherwise specified, each specimen shall be tested in the conditioning atmosphere and
at the conditioning temperature, or the tests shall commence within 3 min of removal of each
test specimen from the conditioning atmosphere.
Where testing at an elevated temperature is required in one of the specification sheets of
IEC 60893-3, test specimens shall be conditioned for 1 h at that elevated temperature
immediately before testing.
5 Dimensions
5.1 Thickness
5.1.1 General
Any method which enables the thickness of the laminated sheet to be measured at an
appropriate number of points may be used, provided that the equipment used and the method
of measurement are capable of a precision of 0,01 mm or better.
The following reference method has been shown to be suitable and shall be used in cases
of dispute.
5.1.2 Test apparatus for reference method
In case of dispute, an external screw type micrometer in accordance with ISO 3611 having faces
with diameters between 6 mm and 8 mm shall be used.
5.1.3 Procedure for reference method
Measure the thickness of the rigid laminated sheet as delivered to the nearest 0,01 mm at eight
points, two along each edge but not less than 20 mm from the edge.
5.1.4 Results
Report the maximum and minimum measured values and the arithmetic mean of all measured
values in mm.
5.2 Flatness
5.2.1 General
This test is applicable to all sheets having a thickness of 3 mm or greater.
5.2.2 Test specimens
The test specimen shall be the whole sheet or panel under test in the ‘as received’ condition.
IEC 60893-2:2023 © IEC 2023 – 11 –
5.2.3 Test method
When any sheet of nominal thickness 3,0 mm or more is placed without restraint, concave side
up, on a flat surface, the departure at any point of the upper surface of the sheet from a light
straight edge 1 000 mm or 500 mm in length, laid in any direction upon it, shall not exceed the
value given in the relevant sheet of IEC 60893-3 appropriate to the material, its thickness and
length of straight edge. The mass of the 1 000 mm straight edge shall not exceed 800 g, and the
mass of the 500 mm straight edge shall not exceed 400 g.
5.2.4 Results
Report the maximum measured deviation from flatness in mm.
In cases where the sheet deviates from flatness in two directions, is saddle-shaped, measure
both deviations and report the highest.
6 Mechanical tests
6.1 Flexural strength
6.1.1 General
The flexural strength is defined as the flexural stress at rupture. It shall be determined by the
method specified in ISO 178. Method A shall be used.
6.1.2 Test specimens
Cut the test specimens from the sheet to be tested with their major axes parallel to the sides of
the sheet. Test five test specimens in each direction, except for types with fibres aligned mainly
in the same direction. In such cases, cut five specimens only, with their long axis parallel to the
direction of the fibres.
If the nominal thickness of the sheet to be tested is more than 10 mm (20 mm in the case of
types PF WV), reduce the thickness of the test specimens to 10 mm (20 mm in the case
of PF WV).
When it is necessary to reduce the thickness of a test specimen, machine it, leaving one face
of the sheet intact. In such cases, test specimens shall be tested with the original surface of
the sheet in contact with the two supports.
6.1.3 Test method
The test shall be carried out with the load applied perpendicular to the plane of the laminations.
The test speed shall be 5 mm/min with a tolerance of ±20 %.
6.1.4 Results
Report the arithmetic mean of the results for each direction in MPa. Take the lower of the two
mean values as the minimum flexural strength of the sheet under test, except in cases where
the reinforcing fibres run mainly in one direction. In such cases, take the mean value obtained
in this direction.
6.2 Modulus of elasticity in flexure
6.2.1 General
The following test method shall be used in order to determine the modulus of elasticity in flexure.
– 12 – IEC 60893-2:2023 © IEC 2023
6.2.2 Test specimens
The specimens shall be in the same form as described for the flexural strength test described
in 6.1.2 above.
6.2.3 Test method
Modulus of elasticity shall be determined by the method specified in ISO 178.
6.2.4 Results
Results shall be expressed in MPa.
6.3 Compressive strength
6.3.1 General
The following test method shall be used in order to determine the compressive strength.
6.3.2 Test specimens
Specimens shall be cut from the sheet under test as described in ISO 604.
6.3.3 Test method
Compressive strength shall be determined by the method specified in ISO 604 with the load
applied perpendicular to the plane of the laminations.
6.3.4 Results
Results shall be expressed in MPa.
6.4 Impact strength
6.4.1 General
This test is only applicable to sheets of nominal thickness equal to or greater than 5 mm.
6.4.2 Charpy Impact strength
6.4.2.1 Test specimens
Test specimens shall be cut from the sheet under test in accordance with Figure 1 a). Five
specimens, with a thickness between 5 mm and 10 mm, shall be tested in each direction, except
for types with fibres aligned mainly in the same direction. In such cases, cut five specimens
only, with their longitudinal axis parallel to the direction of the fibres.
If the nominal thickness of the sheet to be tested is greater than 10 mm, reduce the thickness
of the test specimen to 10 mm by machining equal amounts from both faces of the sheet.
6.4.2.2 Test method
The Charpy impact strength shall be determined in the edgewise direction as described by the
method given in ISO 179-1 and ISO 179-2 except that the specimens shall be as described
above, and the span shall be 70 mm. The material shall be tested with the major axes in each
direction parallel to the sides of the sheet, except in the case of materials whose fibres lie
mainly in the same direction. For these materials only specimens with their longitudinal axis
parallel to the direction of the fibres shall be tested.
IEC 60893-2:2023 © IEC 2023 – 13 –
6.4.2.3 Results
Report the arithmetic mean of the results for each direction in kJ/m . Take the lower of the two
mean values as the minimum Charpy impact strength of the sheet under test, except in cases
where the reinforcing fibres run mainly in one direction. In such cases, take the mean value
obtained in this direction.
6.4.3 Izod impact strength
6.4.3.1 Test specimens
The dimensions of the specimens shall be as described in Figure 1 b). Five specimens, with a
thickness between 5 mm and 10 mm, shall be tested in each direction, except for types with
fibres aligned mainly in the same direction. In such cases, cut five specimens only, with their
longitudinal axis parallel to the direction of the fibres.
If the nominal thickness of the sheet to be tested is greater than 10 mm, reduce the thickness
of the test specimen to 10 mm by machining equal amounts from both faces of the sheet.
6.4.3.2 Test method
The Izod impact strength shall be determined in the edgewise direction as described by the
method given in ISO 180. The material shall be tested with the major axes in each direction
parallel to the sides of the sheet, except in the case of materials whose fibres lie mainly in the
same direction. For these materials only, specimens with their longitudinal axis parallel to
the direction of the fibres shall be tested.
6.4.3.3 Results
Report the arithmetic mean of the results for each direction in kJ/m . Take the lower of the two
mean values as the minimum Izod impact strength of the sheet under test, except in cases
where the reinforcing fibres run mainly in one direction. In such cases, take the mean value
obtained in this direction.
6.5 Shear strength parallel to laminations
6.5.1 General
The shear strength parallel to laminations test provides data that gives an indication of the
degree of bonding or adhesion between laminations. The test is only applicable to sheets
of nominal thickness greater than 5 mm.
6.5.2 Test specimens
Rectangular test specimens are cut with the following dimensions:
Length 20 mm ± 0,1 mm
Width and thickness 5 mm
− 0,15
Cut the test specimens from the sheet to be tested with their major axes parallel to the sides of
the sheet. Prepare five sets of test specimens for each direction, each set of specimens
comprising two pieces.
The two specimens in each pair shall have widths (dimension along the laminations orthogonal
to the length) identical within 0,01 mm.
– 14 – IEC 60893-2:2023 © IEC 2023
6.5.3 Test method
Two test specimens are simultaneously subjected to shearing stress in the device shown in
Figure 2.
The test specimens shall be arranged so that the shearing stress acts in a plane parallel to the
laminations. The relative rate of movement of the cross head of the testing machine shall be
2 mm/min with a tolerance of ±20 %.
6.5.4 Results
Calculate the shear strength by dividing the shear force through the total shear plane area
of 2 × 100 mm .
Report the arithmetic mean value of the results for each direction in MPa and take the lower
of the two mean values as the parallel shearing strength of the sheet under test.
6.6 Tensile strength
6.6.1 General
Tensile strength defined as tensile stress at maximum load shall be determined by the method
specified in ISO 527-4, in conjunction with ISO 527-1.
6.6.2 Test specimens
Specimens shall be cut from the sheet under test with the major axis in each direction parallel
to the sides of the sheet. Five specimens of nominal thickness between 1,5 mm and 10,0 mm
shall be prepared from each direction according to type 1 of ISO 527-4, except in the case of
materials whose fibres lie mainly in the same direction. For these materials, only specimens
with their longitudinal axis parallel to the direction of the fibres shall be tested.
If the sheet to be tested is more than 10 mm thick, reduce t
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