EN ISO 20753:2018

SLOVENSKI STANDARD
01-februar-2019
1DGRPHãþD
SIST EN ISO 20753:2014
Polimerni materiali - Preskušanci (ISO 20753:2018)
Plastics - Test specimens (ISO 20753:2018)
Kunststoffe - Probekörper (ISO 20753:2018)
Plastiques - Éprouvettes (ISO 20753:2018)
Ta slovenski standard je istoveten z: EN ISO 20753:2018
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 20753
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2018
EUROPÄISCHE NORM
ICS 83.080.01 Supersedes EN ISO 20753:2014
English Version
Plastics - Test specimens (ISO 20753:2018)
Plastiques - Éprouvettes (ISO 20753:2018) Kunststoffe - Probekörper (ISO 20753:2018)
This European Standard was approved by CEN on 9 June 2018.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20753:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 20753:2018) has been prepared by Technical Committee ISO/TC 61 "Plastics"
in collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by
NBN.
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 2019, and conflicting national standards shall be
withdrawn at the latest by May 2019.
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 ISO 20753:2014.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 20753:2018 has been approved by CEN as EN ISO 20753:2018 without any modification.

INTERNATIONAL ISO
STANDARD 20753
Second edition
2018-10
Plastics — Test specimens
Plastiques — Éprouvettes
Reference number
ISO 20753:2018(E)
©
ISO 2018
ISO 20753:2018(E)
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
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Published in Switzerland
ii © ISO 2018 – All rights reserved

ISO 20753:2018(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Symbols . 2
5 Preparation of test specimens . 3
5.1 General . 3
5.2 Injection moulding of test specimens . 3
5.3 Compression moulding of test specimens . 3
5.4 Preparation of test specimens by machining . 3
6 Types of test specimen and their dimensions . 4
6.1 Types of test specimen . 4
6.2 Tensile test specimens with parallel-sided central section . 5
6.2.1 Tensile test specimens type A1 and type A2 . 5
6.2.2 Reduced-scale test specimens . 6
6.3 Bar test specimens (type B) . 7
6.4 Small tensile specimens (type C) . 7
6.5 Square plate specimens (type D) . 9
6.6 Rectangular plate specimens (type F) . 9
7 Report on preparation of test specimens .10
Annex A (informative) Recommended applications for multipurpose test specimens or
parts thereof .11
Annex B (normative) Designation system for test specimens .12
Bibliography .14
ISO 20753:2018(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2,
Mechanical behaviour.
This second edition cancels and replaces the first edition (ISO 20753:2008) which has been technically
revised.
The main changes compared to the previous edition are as follows:
— updating and amending the normative references in Clause 2;
— introducing the plate with dimensions 120 mm × 80 mm × 2 mm.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2018 – All rights reserved

ISO 20753:2018(E)
Introduction
Information on plastics test specimens has been specified in several different locations: in test method
standards (e.g. ISO 527-2), in ISO 3167 (for multipurpose test specimens) and in ISO 294-1, ISO 294-2,
ISO 294-3 and ISO 294-5 (for moulding conditions). The aim of this document is to give the designations
and dimensions of test specimens used for the acquisition of comparable data, and also of other
frequently used specimens, in one document for ease of reference. Other International Standards that
have hitherto used different designations for the same specimen type will also be revised to bring the
designations into line with those in this document.
ISO 3167 is intended to be withdrawn after reference to ISO 3167 in International Standards is gradually
replaced with the appropriate test specimen defined in this document.
INTERNATIONAL STANDARD ISO 20753:2018(E)
Plastics — Test specimens
1 Scope
This document specifies dimensional requirements relating to test specimens prepared from plastics
materials intended for processing by moulding, as well as to test specimens prepared by machining
from sheets or shaped articles. It compiles the designations and dimensions of test specimens used for
the acquisition of comparable data and also of other frequently used specimens.
The following types of test specimen are specified:
a) Type A1 and type A2 specimens (1 = injection moulded, 2 = machined from a sheet or shaped
article)
These are tensile test specimens from which, with simple machining, specimens for a variety of
other tests can be taken (see Annex A).
The type A1 specimen is a multipurpose test specimen. The principal advantage of a multipurpose
test specimen is that it allows all the test methods mentioned in Annex A to be carried out by all
test laboratories on the basis of comparable mouldings. Consequently, the properties measured
are coherent as all are measured using similar specimens prepared in the same way. In other
words, it can be expected that test results for a given set of specimens will not vary appreciably
due to unintentionally different moulding conditions. On the other hand, if desired, the influence of
moulding conditions and/or different states of the specimens can be assessed without difficulty for
all of the properties measured.
Also described are reduced-scale test specimens designated type Axy, where x is the number
indicating the method of specimen preparation (1 = injection moulded, 2 = machined from a sheet
or shaped article) and y is a number indicating the scale factor (1:y). These can be used e.g. when
full-sized test specimens are not convenient or when sample material exists in small quantities only.
b) Type B specimens
These are bar specimens which can be directly moulded or can be machined from the central
section of type A1 specimens or from sheets or shaped articles.
c) Type C specimens
These are small tensile test specimens which can be directly moulded or machined, e.g. from plates
(Type D or type F specimens), from the central section of type A1 specimens or from sheets or
shaped articles.
d) Type D1 and type D2 specimens
These are square plates of thickness 1 mm and 2 mm, respectively.
e) Type F specimens
These are rectangular plates intended for use in the analysis of mechanical anisotropy.
If a particular type of test specimen is not mentioned in this document, this does not mean that there
is any intention to exclude the use of the specimen. Additional specimen types can be added in future if
they are commonly used.
ISO 20753:2018(E)
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.
ISO 293, Plastics — Compression moulding of test specimens of thermoplastic materials
ISO 294-1, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 1: General
principles, and moulding of multipurpose and bar test specimens
ISO 294-2, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 2: Small
tensile bars
ISO 294-3, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 3: Small plates
ISO 294-5, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 5: Preparation
of standard specimens for investigating anisotropy
ISO 295, Plastics — Compression moulding of test specimens of thermosetting materials
ISO 2818, Plastics — Preparation of test specimens by machining
ISO 10350-1, Plastics — Acquisition and presentation of comparable single-point data — Part 1: Moulding
materials
ISO 10350-2, Plastics — Acquisition and presentation of comparable single-point data — Part 2: Long-
fibre-reinforced plastics
ISO 10724-1, Plastics — Injection moulding of test specimens of thermosetting powder moulding compounds
(PMCs) — Part 1: General principles and moulding of multipurpose test specimens
ISO 11403-1, Plastics — Acquisition and presentation of comparable multipoint data — Part 1: Mechanical
properties
ISO 11403-2, Plastics — Acquisition and presentation of comparable multipoint data — Part 2: Thermal
and processing properties
ISO 11403-3, Plastics — Acquisition and presentation of comparable multipoint data — Part 3:
Environmental influences on properties
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
4 Symbols
l length of the narrow parallel-sided section (central section) of the type A and type CP tensile
test specimens, length of the type B bar specimen and length of the type D (square) and type F
(rectangular) plate specimens
l distance between the broad parallel-sided sections (tabs) of the type A and type CP tensile test
specimens
l overall length of the type A and type C tensile test specimens
2 © ISO 2018 – All rights reserved

ISO 20753:2018(E)
b width of the narrow parallel-sided section (central section) of the type A tensile test specimen,
minimum width of the type C test specimen and the width of the type D (square) and type F (rec-
tangular) plate specimens
b width of the broad parallel-sided sections (tabs) of the type A and type C tensile test specimens
r radius of the shoulder region of the type A and type C tensile test specimens
h thickness of the test specimen
5 Preparation of test specimens
5.1 General
Test specimens shall be prepared in accordance with the relevant material specification. When
none exists, specimens shall be either directly compression or injection moulded from the material
in accordance with ISO 293, ISO 294-1, ISO 294-2, ISO 294-3, ISO 294-5, ISO 295 or ISO 10724-1, as
appropriate, or machined in accordance with ISO 2818 from sheets that have been compression or
injection moulded from the compound, extruded from the compound or polymerized and cast.
Strict control of all the specimen preparation conditions is essential to ensure that all test specimens in
a set are in the same state.
All surfaces of the test specimens shall be free from visible flaws, scratches or other imperfections.
With moulded specimens, any flash present shall be completely removed, taking care not to damage the
moulded surface.
The broad sides of multipurpose test specimens shall be suitably mark
...