SIST EN ISO 13802:2015

Plastics - Verification of pendulum impact-testing machines - Charpy, Izod and tensile impact-testing (ISO 13802:2015, Corrected version 2016-04-01)

ISO 13802:2015 specifies frequency and methods for the verification of pendulum impact-testing machines used for the Charpy impact test, Izod impact test, and tensile impact test described in ISO 179‑1, ISO 180, and ISO 8256, respectively. Verification of instrumented impact machines is covered insofar as the geometrical and physical properties of instrumented machines are identical to non instrumented machines. The force/work verification of instrumented machines is not covered in this International Standard.

Kunststoffe - Verifizierung von Pendelschlagwerken - Charpy-, Izod- und Schlagzugversuch (ISO 13802:2015, korrigierte Fassung 2016-04-01)

Diese Internationale Norm legt die Häufigkeit der und die Verfahren für die Verifizierung von Pendelschlag¬werken (Prüfmaschinen) zur Anwendung für den Charpy-Schlagversuch, den Izod-Schlagversuch und den Schlagzugversuch, die in ISO 179-1, ISO 180 und ISO 8256 beschrieben sind, fest. Die Verifizierung der instrumentierten Prüfmaschinen wird von dieser Internationalen Norm nicht abgedeckt.
Diese Internationale Norm gilt für Prüfmaschinen vom Pendelschlagtyp mit unterschiedlichen Kapazitäten (Schlagenergien) und/oder Konstruktionen und den in Abschnitt 5 definierten geometrischen und physika¬lischen Eigenschaften.
Es werden Verfahren zur Verifizierung der geometrischen und physikalischen Eigenschaften der verschie¬denen Teile der Prüfmaschine beschrieben. Die Verifizierung einiger geometrischer Eigenschaften ist an der zusammengebauten Prüfmaschine schwierig auszuführen. Es wird daher angenommen, dass der Hersteller für die Verifizierung derartiger Eigenschaften und für die Bereitstellung von Bezugsebenen an der Prüf¬maschine, die eine ordnungsgemäße Verifizierung nach dieser Internationalen Norm ermöglichen, verant¬wortlich ist.
Diese Verfahren sind für die Anwendung vorgesehen, wenn die Prüfmaschine installiert oder instand gesetzt sowie bewegt wurde oder einer regelmäßigen Überprüfung unterzogen wird.
Ein nach dieser Internationalen Norm verifiziertes und als zufriedenstellend beurteiltes Pendelschlagwerk wird für Schlagzähigkeitsprüfungen mit ungekerbten und gekerbten Probekörpern unterschiedlicher Arten als geeignet angesehen.
Anhang A beschreibt ausführlich die konstruktiven Anforderungen an Prüfmaschinen zur Anwendung für den Charpy-Schlagversuch.
Anhang B beschreibt ausführlich die konstruktiven Anforderungen an Prüfmaschinen zur Anwendung für den Izod-Schlagversuch.
Anhang C beschreibt ausführlich die konstruktiven Anforderungen an Prüfmaschinen zur Anwendung für den Schlagzugversuch.
Anhang D erklärt, wie das zum Vermeiden von fehlerhafter Schlagenergie erforderliche Verhältnis der Rahmenmasse zur Pendelmasse berechnet wird.
Anhang E erklärt die Verzögerung des Pendels beim Schlag.
Anhang F beschreibt ausführlich die Anforderungen an die Bauart einer Messlehre (Lehrenplatte), die zur Verifizierung der Hammerfinne und der Ausrichtung des Widerlagers/Auflagers angewendet wird.

Plastiques - Vérification des machines d'essai de choc pendulaire - Essais de choc Charpy, Izod et de choc-traction (ISO 13802:2015, Version corrigée 2016-04-01)

ISO 13802:2015 spécifie la fréquence et les méthodes permettant la vérification des machines d'essai de choc pendulaire utilisées lors des essais de choc Charpy, des essais de choc Izod et des essais de choc-traction décrits dans l'ISO 179‑1, l'ISO 180 et l'ISO 8256, respectivement. La vérification des machines d'essai de choc instrumentées est couverte dans la mesure où les propriétés géométriques et physiques des machines instrumentées sont identiques aux machines non instrumentées. La vérification force/travail des machines instrumentées n'est pas couverte dans la présente Norme internationale.

Polimerni materiali - Overjanje strojev z nihalom za ugotavljanje udarnih lastnosti - Preskušanje po Charpyju, Izodu in natezno-udarno preskušanje (ISO 13802:2015, popravljena različica 2016-04-01)

Ta mednarodni standard določa pogostost in metode za overjanje strojev z nihalom za ugotavljanje udarnih lastnosti, ki se uporabljajo za preskušanje po Charpyju, Izodu ter natezno-udarno preskušanje iz standardov ISO 179-1, ISO 180 in ISO 8256. Overjanje strojev za ugotavljanje udarne žilavosti z instrumentalno metodo je obravnavano, če so geometrijske in fizikalne lastnosti strojev z instrumentalno metodo enake strojem brez instrumentalne metode. Overjanje strojev z instrumentalno metodo na podlagi sile/dela ni obravnavano v tem mednarodnem standardu.
Ta mednarodni standard se uporablja za stroje z nihalom za ugotavljanje udarnih lastnosti, z različno zmogljivostjo in/ali zasnovo, z geometrijskimi in fizikalnimi lastnostmi iz člena 5.
Metode so opisane za overjanje geometrijskih in fizikalnih lastnosti različnih delov stroja za preskušanje. Overjanje nekaterih geometrijskih lastnosti je težko izvesti s sestavljenim instrumentom. Zato se predvideva, da je proizvajalec odgovoren za overjanje takih lastnosti in zagotavljanje referenčnih ravnin na instrumentu, ki omogočajo pravilno overjanje v skladu s tem mednarodnim standardom.
Te metode se uporabljajo, ko se stroj namešča, popravlja, premakne ali prestaja redno preverjanje.
Stroj z nihalom za ugotavljanje udarnih lastnosti, overjen v skladu s tem mednarodnim standardom,
ki se oceni za zadovoljivega, velja za ustreznega za ugotavljanje udarnih lastnosti z nezarezanimi in zarezanimi
preskusnimi vzorci različnih tipov.
Dodatek A obravnava zahteve glede zasnove za stroje za preskušanje po Charpyju.
Dodatek B obravnava zahteve glede zasnove za stroje za preskušanje po Izodu.
Dodatek C obravnava zahteve glede zasnove za stroje za natezno-udarno preskušanje.
Dodatek D razlaga, kako izračunati razmerje med maso okvirja in maso nihala, kar je potrebno za preprečevanje napak pri udarni energiji.
Dodatek E razlaga pojemek nihala med udarcem.
Dodatek F opisuje zahteve glede zasnove za en tip profila, ki se uporablja za overjanje usklajenosti udarnega kladiva in nakovala/podpore
za stroj za preskušanje po Charpyju.

General Information

• Status: Withdrawn
• Public Enquiry End Date: 28-Feb-2014
• Publication Date: 26-Jul-2015
• Withdrawal Date: 29-Sep-2025
• ICS: 83.200 - Equipment for the rubber and plastics industries
• Technical Committee: IPMA - Polimer materials and products
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 29-Sep-2025
• Due Date: 22-Oct-2025
• Completion Date: 30-Sep-2025
• Ref Project: EN ISO 13802:2015 - Plastics - Verification of pendulum impact-testing machines - Charpy, Izod and tensile impact-testing (ISO 13802:2015, Corrected version 2016-04-01)

Relations

• Replaces: SIST EN ISO 13802:2006 - Plastics - Verification of pendulum impact-testing machines - Charpy, Izod and tensile impact-testing (ISO 13802:1999, including Corrigendum 1:2000)
• Effective Date: 01-Sep-2015
• Revises: SIST EN ISO 13802:2025 - Plastics - Verification of pendulum impact-testing machines - Charpy, Izod and tensile impact-testing (ISO 13802:2025)
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2015
1DGRPHãþD
SIST EN ISO 13802:2006
Polimerni materiali - Overjanje strojev z nihalom za ugotavljanje udarnih lastnosti -
Preskušanje po Charpyju, Izodu in natezno-udarno preskušanje (ISO 13802:2015)
Plastics - Verification of pendulum impact-testing machines - Charpy, Izod and tensile
impact-testing (ISO 13802:2015)
Kunststoffe - Verifizierung von Pendelschlagwerken - Charpy-, Izod- und
Schlagzugversuch (ISO 13802:2015)
Plastiques - Vérification des machines d'essai de choc pendulaire - Essais de choc
Charpy, Izod et de choc-traction (ISO 13802:2015)
Ta slovenski standard je istoveten z: EN ISO 13802:2015
ICS:
83.200 Oprema za gumarsko Equipment for the rubber and
industrijo in industrijo plastics industries
polimernih materialov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 13802
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2015
ICS 83.200 Supersedes EN ISO 13802:2006
English Version
Plastics - Verification of pendulum impact-testing machines -
Charpy, Izod and tensile impact-testing (ISO 13802:2015)
Plastiques - Vérification des machines d'essai de choc Kunststoffe - Verifizierung von Pendelschlagwerken -
pendulaire - Essais de choc Charpy, Izod et de choc- Charpy-, Izod- und Schlagzugversuch (ISO 13802:2015)
traction (ISO 13802:2015)
This European Standard was approved by CEN on 16 April 2015.

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, 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: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13802:2015 E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 13802:2015) 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 December 2015, and conflicting national standards shall be withdrawn
at the latest by December 2015.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 13802:2006.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 13802:2015 has been approved by CEN as EN ISO 13802:2015 without any modification.
INTERNATIONAL ISO
STANDARD 13802
Second edition
2015-06-01
Plastics — Verification of pendulum
impact-testing machines — Charpy,
Izod and tensile impact-testing
Plastiques — Vérification des machines d’essai de choc pendulaire —
Essais de choc Charpy, Izod et de choc-traction
Reference number
ISO 13802:2015(E)
©
ISO 2015
ISO 13802:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, 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 below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2015 – All rights reserved

ISO 13802:2015(E)
Contents  Page
Foreword .v
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 2
4  Measurement instruments . 4
5  Description of a pendulum impact-testing machine . 4
5.1 Types of pendulum impact-testing machines . 4
5.2 Testing machine components . 4
5.2.1 Machine frame — The base of the machine and the structure supporting
the pendulum . 4
5.2.2 Pendulum . 4
5.2.3 Test specimen anvils, supports, clamps and/or holders . 5
5.2.4 Indicating equipment for absorbed energy (e.g. scale and friction pointer
or electronic readout device) . 5
6  Procedure for verification and inspection of a pendulum impact-testing machine .5
6.1 Certification of machine design and manufacturer . 5
6.2 Field verification of the machine frame shall consist of determining the following
items (see Table 4) . 6
6.2.1 Installation . 6
6.2.2 Levelness . 6
6.2.3 Axial play of the pendulum bearings . 6
6.2.4 Radial play of the pendulum bearings . 6
6.2.5 Mechanism for holding and releasing the pendulum . 6
6.2.6 Free hanging position . 6
6.2.7 Contact between specimen and striking edge (Izod/Charpy) . 6
6.2.8 Potential energy, E .7
6.2.9 Pendulum length, L .
P 8
6.2.10 Impact length, L .
Ι 9
6.2.11 Velocity of the pendulum at instant of impact, v , . 9
Ι
6.3 Charpy testing machines .10
6.4 Izod testing machines .11
6.4.1 Line of contact of the striker .11
6.4.4 Location of specimen and striker .12
6.4.5 Vice faces .12
6.5 Tensile impact testing machines (see ISO 8256) .12
6.5.1 Specimen clamps for tensile impact test machines .12
6.5.2 Clamps for tensile impact testing .13
6.5.3 Alignment .13
6.5.4 Mass of crosshead .13
6.6 Energy indicating system .13
6.6.1 Types of scale .13
6.6.2 Verification of analogue indicating equipment shall consist of the
following examinations .13
6.6.3 Error in the indicated absorbed energy, W on analogue indicating systems .14
i,
6.6.4 Verification of digital indicating equipment shall ensure that the following
requirements are met .14
6.7 Losses due to friction .15
6.7.1 Types of loss.15
6.7.2 Determination of the loss due to friction in the pointer .15
6.7.3 Determination of losses due to air resistance and friction in the
pendulum bearings .15
6.7.4 Calculation of the total energy lost due to friction .15
ISO 13802:2015(E)
6.7.5 Maximum permissible losses due to friction.15
7  Frequency of verification .17
8  Verification report .17
Annex A (normative) Design requirements for Charpy machines .19
Annex B (normative) Design requirements for Izod machines .21
Annex C (normative) Design requirements for tensile impact machines .23
Annex D (informative) Ratio of frame mass to pendulum mass .26
Annex E (informative) Deceleration of pendulum during impact .30
Annex F (informative) Gauge plate for verification of Charpy impact pendulums .32
iv © ISO 2015 – All rights reserved

ISO 13802:2015(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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical properties.
This second edition cancels and replaces the first edition (ISO 13802:1999), which has been technically
revised. It also incorporates the Technical Corrigendum ISO 13802:1999/Cor.1:2000.
INTERNATIONAL STANDARD ISO 13802:2015(E)
Plastics — Verification of pendulum impact-testing
machines — Charpy, Izod and tensile impact-testing
1  Scope
This International Standard specifies frequency and methods for the verification of pendulum impact-
testing machines used for the Charpy impact test, Izod impact test, and tensile impact test described
in ISO 179-1, ISO 180, and ISO 8256, respectively. Verification of instrumented impact machines is
covered insofar as the geometrical and physical properties of instrumented machines are identical to
non instrumented machines. The force/work verification of instrumented machines is not covered in
this International Standard.
This International Standard is applicable to pendulum-type impact-testing machines, of different
capacities and/or designs, with the geometrical and physical properties defined in Clause 5.
Methods are described for verification of the geometrical and physical properties of the different
parts of the test machine. The verification of some geometrical properties is difficult to perform on the
assembled instrument. It is, therefore, assumed that the manufacturer is responsible for the verification
of such properties and for providing reference planes on the instrument that enable proper verification
in accordance with this International Standard.
These methods are for use when the machine is being installed, has been repaired, has been moved, or
is undergoing periodic checking.
A pendulum impact-testing machine verified in accordance with this International Standard, and
assessed as satisfactory, is considered suitable for impact testing with unnotched and notched test
specimens of different types.
Annex A details design requirements for Charpy testing machines.
Annex B details design requirements for Izod testing machines.
Annex C details design requirements for tensile impact machines.
Annex D explains how to calculate the ratio of frame mass to pendulum mass required to avoid errors
in the impact energy.
Annex E explains deceleration of pendulum during impact.
Annex F details design requirements for one type of gauge used to verify striker and anvil/support
alignment for Charpy testing machine.
2  Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 179-1, Plastics — Determination of Charpy impact properties — Part 1: Non-instrumented impact test
ISO 179-2, Plastics — Determination of Charpy impact properties — Part 2: Instrumented impact test
ISO 180, Plastics — Determination of Izod impact strength
ISO 8256, Plastics — Determination of tensile-impact strength
ISO 13802:2015(E)
3  Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
verification
proof, with the use of calibrated standards or standard reference materials, that the calibration of an
instrument is acceptable
3.2
calibration
set of operations that establish, under specified conditions, the relationship between values indicated
by a measuring instrument or measuring system and values corresponding to appropriate standards or
known values derived from standards
3.3
period of oscillation of the pendulum
Τ
P
period, expressed in seconds, s, of a single complete oscillation of the pendulum, oscillating at angles of
oscillation of less than 5°, on average, to each side of the vertical
3.4
centre of percussion
point on a pendulum at which a perpendicular impact in the plane of swing does not cause reaction
forces at the axis of rotation of the pendulum
3.5
pendulum length
L
P
distance, expressed in metres, between the axis of rotation of the pendulum and the centre of percussion
(3.4) and it is the distance from the axis of rotation where the mass of a pendulum would have to be
concentrated to have the same period of swing, Τ , as the actual pendulum
P
3.6
gravity length
Lm
distance, expressed in metres, between the axis of rotation of the pendulum and the centre of gravity
of the pendulum
3.7
gyration length
L
G
distance, expressed in metres, between the axis of rotation of the pendulum and the point at which the
pendulum mass, m , would have to be concentrated to give the same moment of inertia as the pendulum
P
3.8
impact length
L
Ι
distance, expressed in metres, between the axis of the rotation of the pendulum and the point of impact
of the striking edge at the centre of the specimen face
3.9
release angle
α
angle, expressed in degrees, relative to the vertical, from which the pendulum is released
Note 1 to entry: Usually, the test specimen is impacted at the lowest point of the pendulum swing (α = 0°). In this
case, the release angle will also be the angle of fall [see Figure 1b)].
2 © ISO 2015 – All rights reserved

ISO 13802:2015(E)
3.10
impact velocity
v
Ι
velocity, expressed in metres per second, of the pendulum at the moment of impact
3.11
potential energy
E
potential energy, expressed in joules, of the pendulum in its starting position, relative to its position at impact
3.12
impact energy
W
energy, expressed in joules, required to deform, break, and push away the test specimen
3.13
frame
part of the machine carrying the pendulum bearings, the supports, the vice and/or clamps, the
measurement instruments, and the mechanism for holding and releasing the pendulum
Note 1 to entry: The mass of the frame, m , is expressed in kilograms.
F
3.14
base
part of the framework of the machine located below the horizontal plane of the supports
3.15
anvil
portion of the machine that serves to properly position the test piece for impact, with respect to the
striker and the test piece supports, and supports the test piece under the force of the strike
3.16
test specimen supports
portion of the machine that serves to properly position the test specimen for impact, with respect to the
centre of percussion of the pendulum, the striker, and the anvils
3.17
striker
portion of the pendulum that contacts the test piece
3.18
period of oscillation of the frame
T
F
period, expressed in seconds, of the freely decaying, horizontal oscillation of the frame and it characterizes
the oscillation of the frame vibrating against the stiffness of the (resilient) mounting, e.g. a test bench
and/or its foundation (which may include damping material for instance) (see Annex D)
3.19
mass of the pendulum
m
P,max
mass, expressed in kilograms, of the heaviest pendulum used
3.20
Izod/Charpy impact reference specimen
specimen made from stainless steel 80 mm ± 0,05 mm in length and of rectangular section,
10 mm ± 0,02 mm in height, and 10 mm ± 0,02 mm in width
3.21
half-height Charpy impact reference specimen
specimen made from stainless steel 80 mm ± 0,05 mm in length and of rectangular section,
5 mm ± 0,02 mm in height, and 10 mm ± 0,02 mm in width
ISO 13802:2015(E)
3.22
tensile impact reference specimen
specimen made from stainless steel 80 mm ± 0,05 mm in length and of rectangular section,
10 mm ± 0,02 mm in height, and 4 mm ± 0,02 mm in width
4  Measurement instruments
The verification methods described in this International Standard call for the use of straight edges,
vernier calipers, set squares, levels and dynamometers, load cells or scales, and timing devices to
check if the geometrical and physical properties of the components of the test machine conform to the
requirements given in this International Standard.
These measurement instruments shall be accurate enough to measure the parameters within the
tolerance limits given in Clause 6 (Table 4).
5  Description of a pendulum impact-testing machine
5.1  Types of pendulum impact-testing machines
Three different types of test machines are covered by this International Standard. Annex A contains
details of construction and performance of a machine configured for Charpy testing. Figure A.1 shows
a typical example of a Charpy test machine. Important values to be verified are listed in Table A.1. Test
conditions are found in ISO 179.
Annex B contains details of construction and performance of a machine configured for Izod testing.
Figure B.1 shows a typical example of an Izod test machine. Important values to be verified are listed in
Table B.1. Test conditions are found in ISO 180.
Annex C contains details of construction and performance of a machine configured for tensile impact
testing. Figures C.1 and C.2 show typical examples of tensile impact-testing machines. Important values
to be verified are listed in Table C.1. Test conditions are found in ISO 8256.
5.2  Testing machine components
A pendulum impact testing machine consists of the following parts:
5.2.1  Machine frame — The base of the machine and the structure supporting the pendulum
5.2.1.1  Bearings.
5.2.1.2  Mechanism for holding and releasing the pendulum.
5.2.1.3  Base.
5.2.2  Pendulum
5.2.2.1  Pendulum rod or compound (bifurcated) design.
5.2.2.2  Striker, with striking edge for Charpy or Izod impact tests or with striking surfaces or clamps
for tensile impact testing (see ISO 8256, test methods A and B respectively).
5.2.2.3  Add-on weights (optional), for increasing potential energy capacity of pendulum.
NOTE There are several pendulum designs available, and they are acceptable if they meet the requirements
of this International Standard.
4 © ISO 2015 – All rights reserved

ISO 13802:2015(E)
5.2.3  Test specimen anvils, supports, clamps and/or holders
5.2.3.1  Anvils and test specimen supports, for Charpy impact testing.
The Charpy test supports and anvils shall be located one on each side of the plane of swing of the
pendulum. The anvils shall be installed perpendicular to the supports and normal to the plane of swing
of the pendulum. Essentially, the specimen rests on the supports and the anvil takes the reaction from
the impact on the specimen.
NOTE Recesses in the supports to accommodate flash on specimens are permitted.
5.2.3.2  Vice, for Izod impact testing.
5.2.3.3  Clamps or stops, for tensile impact testing (see ISO 8256, methods A and B).
5.2.3.4  Crossheads, for tensile impact testing (see ISO 8256, methods A and B).
5.2.4  Indicating equipment for absorbed energy (e.g. scale and friction pointer or electronic
readout device)
6  Procedure for verification and inspection of a pendulum impact-testing machine
6.1  Certification of machine design and manufacturer
There are several aspects of the design and manufacture of an impact machine that are critical to its
performance and can only be certified at the time of manufacture by the manufacturer, including the
following (see Table 1).
6.1.1  Centre of percussion.
6.1.2  Axis of rotation.
6.1.3  Pendulum plane of swing.
6.1.4  Mass of frame.
Unless the ratio, m /m , of the mass of the frame to the mass of the heaviest pendulum used is at
F P,max
least 40, the frame shall be bolted to a rigid test bench.
Since many machines may not have been supplied with manufacturer’s certificates detailing the ratio of
the mass of the frame to the mass of the pendulum, bolting the machine to the test bench and levelling
with shims is strongly recommended.
Table 1 — Components of impact machine to be certified only at the time of manufacture
Parameter Unit Value
Centre of percussion mm At the centre of strike ±2,5
a
Axis of rotation of pendulum — Parallel within ±2/1 000 relative to the reference
plane
Plane of swing relative to axis of rotation — 90° ± 0,1° to the axis of rotation
Mass of frame kg At least 40 times the weight of the heaviest pendulum
used or bolted to a heavy secure bench
a
The reference plane of a particular machine will vary by manufacturer.
ISO 13802:2015(E)
6.2  Field verification of the machine frame shall consist of determining the following
items (see Table 4)
6.2.1  Installation
The pendulum impact-testing machine shall be installed on a sturdy bench or table in an area that is
free from vibration. If the machine is equipped with levelling adjustment screws, the adjustment screws
shall be fixed after levelling in order to maintain the frame in position and the stiffness of the mounting.
During an impact test, there shall be no visible displacement of the frame on its support. Verify that there
is no movement of either the machine or the test bench by configuring the machine with the highest
energy capacity pendulum available on the machine. Latch the pendulum and place a level on the base.
Release the pendulum and observe the level for any movement of the bubble. Any bubble movement
observed requires that the machine be mounted in a more secure manner.
6.2.2  Levelness
Determine the levelness of the reference plane in the direction of the swing and perpendicular to the
swing. The machine shall be installed so that the reference plane is horizontal to within 2/1 000.
6.2.3  Axial play of the pendulum bearings
The endplay in the bearings of the pendulum spindle in the axial direction shall not exceed 0,25 mm.
6.2.4  Radial play of the pendulum bearings
Determine the radial play of the shaft in the pendulum bearings when a torque of 2 ± 0,2 N is applied in
alternate directions perpendicular to the plane of swing of the pendulum. The total play in the radial
direction should not exceed 0,05 mm.
6.2.5  Mechanism for holding and releasing the pendulum
The mechanism for releasing the pendulum from its initial position shall be visually inspected. A properly
functioning release mechanism operates freely and permits the release of the pendulum without initial
impulse, retardation or side vibration, or any other interference that would result in energy loss.
6.2.6  Free hanging position
When hanging free, the pendulum shall hang so that the striking edge is within 6,35 mm of the position
where it would just touch the reference specimen.
6.2.7  Contact between specimen and striking edge (Izod/Charpy)
For Izod and Charpy machines, the striker shall make contact over the full width of the Izod/Charpy
impact reference specimen defined in 3.20.
One method of verifying this is as follows. A Izod/Charpy impact reference specimen is tightly wrapped
in thin paper (e.g. by means of adhesive tape), and is placed in the specimen supports or clamp. Similarly,
the striker edge is tightly wrapped in carbon paper with the carbon side outermost (i.e. not facing the
striker). From its position of equilibrium, the pendulum is raised a few degrees, released so that it contacts
the Izod/Charpy impact reference specimen, and prevented from contacting the test piece a second
time. The mark made by the carbon paper on the paper covering the Izod/Charpy impact reference
specimen should extend completely across the paper. This test may be performed concurrently with that
of checking the angle of contact between the striker and the Izod/Charpy impact reference specimen.
6 © ISO 2015 – All rights reserved

ISO 13802:2015(E)
6.2.8  Potential energy, E
Table 2 shows the nominal potential energy values of pendulums typically used in Charpy, Izod, and
tensile impact machines. The potential energy, E, shall not differ by more than 1 % of the nominal value
given in Table 2. It shall be determined as follows:
a) Support the pendulum at an arbitrary length, L , from the axis of rotation, on a balance or
H
dynamometer. Ensure that the line from the axis of rotation to the centre of gravity of the pendulum
is horizontal [see Figure 1a)].
b) Measure the vertical force, F , in newtons, at L and the length, L , in metres, to a precision of ±1,0 %.
H H H
c) Calculate the horizontal moment, M , of the pendulum about the axis of rotation, in newton metres,
H
using the formula:
M = F L (1)
H H H
d) Measure the release angle, α [see Figure 1b)], to a precision Δα , which corresponds to a relative
0 0
precision of 1/400th of the potential energy, E, and, if applicable, the impact angle, α , to within
I
0,25°. Thus, for starting angles of 140°, 150°, and 160°, Δα is 0,39°, 0,54°, and 0,81°, respectively.
e) Calculate the potential energy, E, of the pendulum from the following formula:
EM=−(cosααcos) (2)
H0I
where
E is the potential energy of the pendulum, in joules;
M is the horizontal moment of the pendulum [see Formula (2)], in newton metres;
H
α is the release angle, in degrees;
α is the impact angle, in degrees.
Ι
NOTE 1 Most pendulum impact-testing machines use an impact angle of 0°, for which cos α = 1.
Ι
NOTE 2 In certain cases, it may be necessary to remove the pendulum from the machine to determine its
moment, M , by the method described.
H
Table 2 — Basic characteristics of Charpy, tensile, and Izod impact-testing machines
Nominal potential  Type of test Impact velocity Maximum permissible losses
energy due to friction without test
specimen
E v % of E
Ι
J m/s
0,5 Charpy 4
1,0 Charpy 2
2,0 Charpy/Tensile 2,9 (±10 %) 1
4,0 Charpy/Tensile 0,5
5,0 Charpy 0,5
ISO 13802:2015(E)
Table 2 (continued)
Nominal potential  Type of test Impact velocity Maximum permissible losses
energy due to friction without test
specimen
E v % of E
Ι
J m/s
7,5 Charpy/Tensile
15 Charpy/Tensile
3,8 (±10 %) 0,5
25 Charpy/Tensile
50 Charpy/Tensile
1,0 Izod 2
2,75 Izod 1
5,5 Izod 3,5 (±10 %) 0,5
11 Izod 0,5
22 Izod 0,5
6.2.9  Pendulum length, L
P
The pendulum length, L shall be certified by the manufacturer at the time of manufacture. Under
P,
normal conditions, it should not change but it shall be verified, if repaired or replaced, as part of the
calibration procedure. The pendulum length shall be determined for each available pendulum.
Determine the pendulum length to within the precision specified (see Table 3).
The pendulum length is verified by measuring the period of oscillation (time of swing), T , of the
P
pendulum. Raise the pendulum and release from a height that results in a swing of a maximum of 5°, on
average, and measuring the time of a complete swing in seconds. Determine the period of oscillation as
the mean value of four determinations.
Table 3 — Examples of minimum number of oscillations for determination of T
P
L T Accuracy of time Minimum number of
P P
measurement oscillations
m s s n
0,225 0,95 0,1 50
0,01 10
0,390 1,25 0,1 50
0,01 10
NOTE Hand-held stopwatches are generally considered to have an accuracy of 0,1 s. Integrated electronic
timing devices are required to give greater accuracy of time measurement.
8 © ISO 2015 – All rights reserved

ISO 13802:2015(E)
Determine the pendulum length, L , from the period of oscillation, T , of the pendulum using Formula (3):
P P
gT
P
L = (3)
P
4π
where
T is the period of oscillation of the pendulum, in seconds;
P
g is taken as equal to 9,81 m/s , however, if the local acceleration of gravity is known or is
believed to be significantly different from 9,81 m/s , the local acceleration of gravity shall be
used;
π is taken as equal to 9,87.
Therefore, in meters, L = 0,2485 T .
P
P
The value of T shall be determined to a precision of 0,5 %.
P
6.2.10 Impact length, L
Ι
The impact length, L (3.8), shall be within 1 % of the pendulum length, L , as determined from the
Ι P
period of oscillation, T , of the pendulum [see Formula (3) and Figure 1a)].
P
6.2.11 Velocity of the pendulum at instant of impact, v,
Ι
The impact velocity, v , shall have the value given in Table 4 for Charpy, Izod, and tensile impact testing,
Ι
respectively.
Determine the impact velocity using Formula (4):
vg=−2 L (cosααcos) (4)
II I 0
where
v is the impact velocity, in metres per second;
Ι
g may be taken as 9,81 m/s (to save measurement at the site of each testing machine);
L is the impact length, in metres;
Ι
α is the release angle, in degrees;
α is the impact angle, in degrees.
Ι
NOTE In most cases, the impact angle is 0°, i.e. cos α = 1.
Ι
ISO 13802:2015(E)
L
a) Quantities for determining the horizontal moment
L
b) Quantities for scale calibration and potential energy calculations
Key
1 axis of rotation 4 angle of rise, α
R
2 vertical force, F 5 release angle, α
H 0
3 centre of percussion 6 arbitrary length from the axis of rotation, that the
pendulum is supported on a balance or dynamometer,
L
H
Figure 1 — Quantities necessary for energy verification
6.3  Charpy testing machines
Inspection and verification of Charpy machines (see Figure A.1 and Table A.1) shall consist of the following:
6.3.1  Position of anvils, relative to striking edge.
The clearance between the anvils and the striker, or any adjacent part of the pendulum that pass
between the anvils, should be sufficient to ensure that the broken specimen is free to leave the machine
with the minimum of interference, thus, preventing the possibility of the specimen rebounding into
the pendulum. Any end stop used for locating the test specimen in the anvils should not impede the
movement of the specimen during the test.
10 © ISO 2015 – All rights reserved

ISO 13802:2015(E)
6.3.2  Contact between Charpy striker and specimen.
6.3.3  Angle between the line of contact of the striker and the horizontal axis of the Izod/Charpy
impact reference specimen (see Figure A.1).
6.3.4  Angle of striker, θ .
6.3.5  Radius of striking edge, R .
6.3.6  Parallelism (Orientation) of supports, p .
6.3.7  Radius of anvils, R .
6.3.8  Angle of taper of anvils, θ .
6.3.9  Angle of slope of anvils, θ .
6.3.10 Angle between supports and anvils surfaces, θ .
6.3.11 Span between the supports.
NOTE The span between the supports varies with specimen type.
6.3.12 Location of notch.
If means is provided for locating the test specimen, it shall ensure that the plane of symmetry of the
notch lies within ±0,5 mm of the centre of the gap between the specimen anvils.
NOTE One type of a gauge that can be used to check the distance between the anvils and their alignment
relative to the striking edge is shown in Annex F.
6.4  Izod testing machines
Inspection and verification of Izod machines (see Figure B.1 and Table B.1) shall consist of the following:
6.4.1  Line of contact of the striker
6.4.2  Striking edge of pendulum for Izod test machines. The striker or tup shall conform to all of the
requirements listed below.
6.4.2.1  Radius, R . The striking edge of the striker or tup shall have a cylindrical surface with its axis
horizontal and perpendicular to the plane of motion of the pendulum.
6.4.2.2 Angle relative to the longitudinal axis of the Izod/Charpy impact reference specimen, θ . When
it contacts the Izod/Charpy impact reference specimen, the striking edge, which shall be centred and
extended beyond both sides of the Izod/Charpy reference specimen.
6.4.2.3  Parallelism, p , with face of Izod/Charpy impact reference specimen (over full width).
ISO 13802:2015(E)
6.4.3  Specimen vice. Vice (clamping and support blocks) designed to hold the test specimen in Izod
machines (see Figure B.1) shall conform to all of the requirements listed below.
6.4.3.1  Parallelism of vice faces in horizontal and vertical direction. With an Izod/Charpy impact
reference specimen clamped in place, the vice faces shall be parallel in both the horizontal and the vertical
direction, p .
6.4.3.2  Horizontality of the top surface of the vice, relative to reference plane, p .
6.4.3.3  Angle between the faces of the support block/clamping block and top surface of vice, θ .
NOTE In addition, use a straight edge and a hand-held light to check for wear. Any indication of light between
the straight edge and the support block indicates that the support block is worn and that it needs to be replaced.
6.4.3.4 Radius of support block. Verify the top edge of the support, about which bending takes place, R .
6.4.3.5 Location of striking edge above top surface of support, D .
6.4.4  Location of specimen and striker
When a reference specimen is located in the vice and clamped so that it is attached rigidly to the frame,
the following requirements shall be conformed to:
a) top surface of the support block shall be parallel, to within 3/1 000, to the reference plane of the machine;
b) longitudinal axis of the specimen shall be perpendicular, to within ±0,5°, to the top surface of the
support block;
c) notch, which shall face the striker, shall be perpendicular to the plane of swing of the pendulum, and
the plane of symmetry of the notch shall coincide with the top surface of the support block, both
within ±0,1 mm;
d) when it contacts the specimen, the striking edge, which shall be sufficiently wide to extend beyond
both sides of the specimen, shall be perpendicular, to within ±2°, to the longitudinal axis of the
specimen and parallel, to within 0,025 mm (= 0,36°), to the face of the specimen, over the full width
of the specimen.
6.4.5  Vice faces
With a specimen clamped in place, the vice faces shall be parallel, to within 4/1 000, in both the horizontal
and the vertical direction.
6.5  Tensile impact testing machines (see ISO 8256)
Inspection and verification of tensile impact machines (see Figures C.1 and C.2 and Table C.1) shall
consist of the following:
6.5.1  Specimen clamps for tensile impact test machines
6.5.1.1  Method A
The specime
...

SLOVENSKI STANDARD
01-september-2015
Nadomešča:
SIST EN ISO 13802:2006
Polimerni materiali - Overjanje strojev z nihalom za ugotavljanje udarnih lastnosti -
Preskušanje po Charpyju, Izodu in natezno-udarno preskušanje (ISO 13802:2015,
popravljena različica 2016-04-01)
Plastics - Verification of pendulum impact-testing machines - Charpy, Izod and tensile
impact-testing (ISO 13802:2015, Corrected version 2016-04-01)
Kunststoffe - Verifizierung von Pendelschlagwerken - Charpy-, Izod- und
Schlagzugversuch (ISO 13802:2015, korrigierte Fassung 2016-04-01)
Plastiques - Vérification des machines d'essai de choc pendulaire - Essais de choc
Charpy, Izod et de choc-traction (ISO 13802:2015, Version corrigée 2016-04-01)
Ta slovenski standard je istoveten z: EN ISO 13802:2015
ICS:
83.200 Oprema za gumarsko Equipment for the rubber and
industrijo in industrijo plastics industries
polimernih materialov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 13802
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2015
EUROPÄISCHE NORM
ICS 83.200 Supersedes EN ISO 13802:2006
English Version
Plastics - Verification of pendulum impact-testing
machines - Charpy, Izod and tensile impact-testing (ISO
13802:2015, Corrected version 2016-04-01)
Plastiques - Vérification des machines d'essai de choc Kunststoffe - Verifizierung von Pendelschlagwerken -
pendulaire - Essais de choc Charpy, Izod et de choc- Charpy-, Izod- und Schlagzugversuch (ISO
traction (ISO 13802:2015, Version corrigée 2016-04- 13802:2015)
01)
This European Standard was approved by CEN on 16 April 2015.

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, 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: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13802:2015 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
This document (EN ISO 13802:2015) 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 December 2015, and conflicting national standards
shall be withdrawn at the latest by December 2015.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN ISO 13802:2006.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 13802:2015, Corrected version 2016-04-01 has been approved by CEN as EN
ISO 13802:2015 without any modification.

INTERNATIONAL ISO
STANDARD 13802
Second edition
2015-06-01
Corrected version
2016-04-01
Plastics — Verification of pendulum
impact-testing machines — Charpy,
Izod and tensile impact-testing
Plastiques — Vérification des machines d’essai de choc pendulaire —
Essais de choc Charpy, Izod et de choc-traction
Reference number
ISO 13802:2015(E)
©
ISO 2015
ISO 13802:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, 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 below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2015 – All rights reserved

ISO 13802:2015(E)
Contents  Page
Foreword .v
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 2
4  Measurement instruments . 4
5  Description of a pendulum impact-testing machine . 4
5.1 Types of pendulum impact-testing machines . 4
5.2 Testing machine components . 4
5.2.1 Machine frame — The base of the machine and the structure supporting
the pendulum . 4
5.2.2 Pendulum . 4
5.2.3 Test specimen anvils, supports, clamps and/or holders . 5
5.2.4 Indicating equipment for absorbed energy (e.g. scale and friction pointer
or electronic readout device) . 5
6  Procedure for verification and inspection of a pendulum impact-testing machine .5
6.1 Certification of machine design and manufacturer . 5
6.2 Field verification of the machine frame shall consist of determining the following
items (see Table 4) . 6
6.2.1 Installation . 6
6.2.2 Levelness . 6
6.2.3 Axial play of the pendulum bearings . 6
6.2.4 Radial play of the pendulum bearings . 6
6.2.5 Mechanism for holding and releasing the pendulum . 6
6.2.6 Free hanging position . 6
6.2.7 Contact between specimen and striking edge (Izod/Charpy) . 6
6.2.8 Potential energy, E .7
6.2.9 Pendulum length, L .
P 8
6.2.10 Impact length, L .
Ι 9
6.2.11 Velocity of the pendulum at instant of impact, v , . 9
Ι
6.3 Charpy testing machines .10
6.4 Izod testing machines .11
6.4.1 Line of contact of the striker .11
6.4.4 Location of specimen and striker .12
6.4.5 Vice faces .12
6.5 Tensile impact testing machines (see ISO 8256) .12
6.5.1 Specimen clamps for tensile impact test machines .12
6.5.2 Clamps for tensile impact testing .13
6.5.3 Alignment .13
6.5.4 Mass of crosshead .13
6.6 Energy indicating system .13
6.6.1 Types of scale .13
6.6.2 Verification of analogue indicating equipment shall consist of the
following examinations .14
6.6.3 Error in the indicated absorbed energy, W on analogue indicating systems .14
i,
6.6.4 Verification of digital indicating equipment shall ensure that the following
requirements are met .14
6.7 Losses due to friction .15
6.7.1 Types of loss.15
6.7.2 Determination of the loss due to friction in the pointer .15
6.7.3 Determination of losses due to air resistance and friction in the
pendulum bearings .15
6.7.4 Calculation of the total energy lost due to friction .15
ISO 13802:2015(E)
6.7.5 Maximum permissible losses due to friction.16
7  Frequency of verification .17
8  Verification report .18
Annex A (normative) Design requirements for Charpy machines .19
Annex B (normative) Design requirements for Izod machines .21
Annex C (normative) Design requirements for tensile impact machines .23
Annex D (informative) Ratio of frame mass to pendulum mass .26
Annex E (informative) Deceleration of pendulum during impact .29
Annex F (informative) Gauge plate for verification of Charpy impact pendulums .31
iv © ISO 2015 – All rights reserved

ISO 13802:2015(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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical
properties.
This second edition cancels and replaces the first edition (ISO 13802:1999), which has been technically
revised. It also incorporates the Technical Corrigendum ISO 13802:1999/Cor.1:2000.
This corrected version of ISO 13802:2015 incorporates the following correction:
— in Table 4, the pendulum length, L , in m, has been changed from “0,225 to 0,390” to “0,221 to 0,417”.
P
INTERNATIONAL STANDARD ISO 13802:2015(E)
Plastics — Verification of pendulum impact-testing
machines — Charpy, Izod and tensile impact-testing
1  Scope
This International Standard specifies frequency and methods for the verification of pendulum impact-
testing machines used for the Charpy impact test, Izod impact test, and tensile impact test described
in ISO 179-1, ISO 180, and ISO 8256, respectively. Verification of instrumented impact machines is
covered insofar as the geometrical and physical properties of instrumented machines are identical to
non instrumented machines. The force/work verification of instrumented machines is not covered in
this International Standard.
This International Standard is applicable to pendulum-type impact-testing machines, of different
capacities and/or designs, with the geometrical and physical properties defined in Clause 5.
Methods are described for verification of the geometrical and physical properties of the different
parts of the test machine. The verification of some geometrical properties is difficult to perform on the
assembled instrument. It is, therefore, assumed that the manufacturer is responsible for the verification
of such properties and for providing reference planes on the instrument that enable proper verification
in accordance with this International Standard.
These methods are for use when the machine is being installed, has been repaired, has been moved, or
is undergoing periodic checking.
A pendulum impact-testing machine verified in accordance with this International Standard, and
assessed as satisfactory, is considered suitable for impact testing with unnotched and notched test
specimens of different types.
Annex A details design requirements for Charpy testing machines.
Annex B details design requirements for Izod testing machines.
Annex C details design requirements for tensile impact machines.
Annex D explains how to calculate the ratio of frame mass to pendulum mass required to avoid errors
in the impact energy.
Annex E explains deceleration of pendulum during impact.
Annex F details design requirements for one type of gauge used to verify striker and anvil/support
alignment for Charpy testing machine.
2  Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 179-1, Plastics — Determination of Charpy impact properties — Part 1: Non-instrumented impact test
ISO 179-2, Plastics — Determination of Charpy impact properties — Part 2: Instrumented impact test
ISO 180, Plastics — Determination of Izod impact strength
ISO 8256, Plastics — Determination of tensile-impact strength
ISO 13802:2015(E)
3  Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
verification
proof, with the use of calibrated standards or standard reference materials, that the calibration of an
instrument is acceptable
3.2
calibration
set of operations that establish, under specified conditions, the relationship between values indicated
by a measuring instrument or measuring system and values corresponding to appropriate standards or
known values derived from standards
3.3
period of oscillation of the pendulum
Τ
P
period, expressed in seconds, s, of a single complete oscillation of the pendulum, oscillating at angles of
oscillation of less than 5°, on average, to each side of the vertical
3.4
centre of percussion
point on a pendulum at which a perpendicular impact in the plane of swing does not cause reaction
forces at the axis of rotation of the pendulum
3.5
pendulum length
L
P
distance, expressed in metres, between the axis of rotation of the pendulum and the centre of percussion
(3.4) and it is the distance from the axis of rotation where the mass of a pendulum would have to be
concentrated to have the same period of swing, Τ , as the actual pendulum
P
3.6
gravity length
Lm
distance, expressed in metres, between the axis of rotation of the pendulum and the centre of gravity of
the pendulum
3.7
gyration length
L
G
distance, expressed in metres, between the axis of rotation of the pendulum and the point at which the
pendulum mass, m , would have to be concentrated to give the same moment of inertia as the pendulum
P
3.8
impact length
L
Ι
distance, expressed in metres, between the axis of the rotation of the pendulum and the point of impact
of the striking edge at the centre of the specimen face
3.9
release angle
α
angle, expressed in degrees, relative to the vertical, from which the pendulum is released
Note 1 to entry: Usually, the test specimen is impacted at the lowest point of the pendulum swing (α = 0°). In this
case, the release angle will also be the angle of fall [see Figure 1b)].
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ISO 13802:2015(E)
3.10
impact velocity
v
Ι
velocity, expressed in metres per second, of the pendulum at the moment of impact
3.11
potential energy
E
potential energy, expressed in joules, of the pendulum in its starting position, relative to its position
at impact
3.12
impact energy
W
energy, expressed in joules, required to deform, break, and push away the test specimen
3.13
frame
part of the machine carrying the pendulum bearings, the supports, the vice and/or clamps, the
measurement instruments, and the mechanism for holding and releasing the pendulum
Note 1 to entry: The mass of the frame, m , is expressed in kilograms.
F
3.14
base
part of the framework of the machine located below the horizontal plane of the supports
3.15
anvil
portion of the machine that serves to properly position the test piece for impact, with respect to the
striker and the test piece supports, and supports the test piece under the force of the strike
3.16
test specimen supports
portion of the machine that serves to properly position the test specimen for impact, with respect to the
centre of percussion of the pendulum, the striker, and the anvils
3.17
striker
portion of the pendulum that contacts the test piece
3.18
period of oscillation of the frame
T
F
period, expressed in seconds, of the freely decaying, horizontal oscillation of the frame and it
characterizes the oscillation of the frame vibrating against the stiffness of the (resilient) mounting, e.g.
a test bench and/or its foundation (which may include damping material for instance) (see Annex D)
3.19
mass of the pendulum
m
P,max
mass, expressed in kilograms, of the heaviest pendulum used
3.20
Izod/Charpy impact reference specimen
specimen made from stainless steel 80 mm ± 0,05 mm in length and of rectangular section,
10 mm ± 0,02 mm in height, and 10 mm ± 0,02 mm in width
ISO 13802:2015(E)
3.21
half-height Charpy impact reference specimen
specimen made from stainless steel 80 mm ± 0,05 mm in length and of rectangular section,
5 mm ± 0,02 mm in height, and 10 mm ± 0,02 mm in width
3.22
tensile impact reference specimen
specimen made from stainless steel 80 mm ± 0,05 mm in length and of rectangular section,
10 mm ± 0,02 mm in height, and 4 mm ± 0,02 mm in width
4  Measurement instruments
The verification methods described in this International Standard call for the use of straight edges,
vernier calipers, set squares, levels and dynamometers, load cells or scales, and timing devices to
check if the geometrical and physical properties of the components of the test machine conform to the
requirements given in this International Standard.
These measurement instruments shall be accurate enough to measure the parameters within the
tolerance limits given in Clause 6 (Table 4).
5  Description of a pendulum impact-testing machine
5.1  Types of pendulum impact-testing machines
Three different types of test machines are covered by this International Standard. Annex A contains
details of construction and performance of a machine configured for Charpy testing. Figure A.1 shows
a typical example of a Charpy test machine. Important values to be verified are listed in Table A.1. Test
conditions are found in ISO 179.
Annex B contains details of construction and performance of a machine configured for Izod testing.
Figure B.1 shows a typical example of an Izod test machine. Important values to be verified are listed in
Table B.1. Test conditions are found in ISO 180.
Annex C contains details of construction and performance of a machine configured for tensile impact
testing. Figures C.1 and C.2 show typical examples of tensile impact-testing machines. Important values
to be verified are listed in Table C.1. Test conditions are found in ISO 8256.
5.2  Testing machine components
A pendulum impact testing machine consists of the following parts:
5.2.1  Machine frame — The base of the machine and the structure supporting the pendulum
5.2.1.1  Bearings.
5.2.1.2  Mechanism for holding and releasing the pendulum.
5.2.1.3  Base.
5.2.2  Pendulum
5.2.2.1  Pendulum rod or compound (bifurcated) design.
5.2.2.2  Striker, with striking edge for Charpy or Izod impact tests or with striking surfaces or clamps
for tensile impact testing (see ISO 8256, test methods A and B respectively).
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ISO 13802:2015(E)
5.2.2.3  Add-on weights (optional), for increasing potential energy capacity of pendulum.
NOTE There are several pendulum designs available, and they are acceptable if they meet the requirements
of this International Standard.
5.2.3  Test specimen anvils, supports, clamps and/or holders
5.2.3.1  Anvils and test specimen supports, for Charpy impact testing.
The Charpy test supports and anvils shall be located one on each side of the plane of swing of the
pendulum. The anvils shall be installed perpendicular to the supports and normal to the plane of swing
of the pendulum. Essentially, the specimen rests on the supports and the anvil takes the reaction from
the impact on the specimen.
NOTE Recesses in the supports to accommodate flash on specimens are permitted.
5.2.3.2  Vice, for Izod impact testing.
5.2.3.3  Clamps or stops, for tensile impact testing (see ISO 8256, methods A and B).
5.2.3.4  Crossheads, for tensile impact testing (see ISO 8256, methods A and B).
5.2.4  Indicating equipment for absorbed energy (e.g. scale and friction pointer or electronic
readout device)
6  Procedure for verification and inspection of a pendulum impact-testing machine
6.1  Certification of machine design and manufacturer
There are several aspects of the design and manufacture of an impact machine that are critical to its
performance and can only be certified at the time of manufacture by the manufacturer, including the
following (see Table 1).
6.1.1  Centre of percussion.
6.1.2  Axis of rotation.
6.1.3  Pendulum plane of swing.
6.1.4  Mass of frame.
Unless the ratio, m /m , of the mass of the frame to the mass of the heaviest pendulum used is at
F P,max
least 40, the frame shall be bolted to a rigid test bench.
Since many machines may not have been supplied with manufacturer’s certificates detailing the ratio of
the mass of the frame to the mass of the pendulum, bolting the machine to the test bench and levelling
with shims is strongly recommended.
ISO 13802:2015(E)
Table 1 — Components of impact machine to be certified only at the time of manufacture
Parameter Unit Value
Centre of percussion mm At the centre of strike ±2,5
a
Axis of rotation of pendulum — Parallel within ±2/1 000 relative to the reference plane
Plane of swing relative to axis of rotation — 90° ± 0,1° to the axis of rotation
Mass of frame kg At least 40 times the weight of the heaviest pendulum
used or bolted to a heavy secure bench
a
The reference plane of a particular machine will vary by manufacturer.
6.2  Field verification of the machine frame shall consist of determining the following
items (see Table 4)
6.2.1  Installation
The pendulum impact-testing machine shall be installed on a sturdy bench or table in an area that
is free from vibration. If the machine is equipped with levelling adjustment screws, the adjustment
screws shall be fixed after levelling in order to maintain the frame in position and the stiffness of the
mounting. During an impact test, there shall be no visible displacement of the frame on its support.
Verify that there is no movement of either the machine or the test bench by configuring the machine
with the highest energy capacity pendulum available on the machine. Latch the pendulum and place
a level on the base. Release the pendulum and observe the level for any movement of the bubble. Any
bubble movement observed requires that the machine be mounted in a more secure manner.
6.2.2  Levelness
Determine the levelness of the reference plane in the direction of the swing and perpendicular to the
swing. The machine shall be installed so that the reference plane is horizontal to within 2/1 000.
6.2.3  Axial play of the pendulum bearings
The endplay in the bearings of the pendulum spindle in the axial direction shall not exceed 0,25 mm.
6.2.4  Radial play of the pendulum bearings
Determine the radial play of the shaft in the pendulum bearings when a torque of 2 ± 0,2 N is applied in
alternate directions perpendicular to the plane of swing of the pendulum. The total play in the radial
direction should not exceed 0,05 mm.
6.2.5  Mechanism for holding and releasing the pendulum
The mechanism for releasing the pendulum from its initial position shall be visually inspected. A
properly functioning release mechanism operates freely and permits the release of the pendulum
without initial impulse, retardation or side vibration, or any other interference that would result in
energy loss.
6.2.6  Free hanging position
When hanging free, the pendulum shall hang so that the striking edge is within 6,35 mm of the position
where it would just touch the reference specimen.
6.2.7  Contact between specimen and striking edge (Izod/Charpy)
For Izod and Charpy machines, the striker shall make contact over the full width of the Izod/Charpy
impact reference specimen defined in 3.20.
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ISO 13802:2015(E)
One method of verifying this is as follows. A Izod/Charpy impact reference specimen is tightly wrapped
in thin paper (e.g. by means of adhesive tape), and is placed in the specimen supports or clamp.
Similarly, the striker edge is tightly wrapped in carbon paper with the carbon side outermost (i.e. not
facing the striker). From its position of equilibrium, the pendulum is raised a few degrees, released
so that it contacts the Izod/Charpy impact reference specimen, and prevented from contacting the
test piece a second time. The mark made by the carbon paper on the paper covering the Izod/Charpy
impact reference specimen should extend completely across the paper. This test may be performed
concurrently with that of checking the angle of contact between the striker and the Izod/Charpy impact
reference specimen.
6.2.8  Potential energy, E
Table 2 shows the nominal potential energy values of pendulums typically used in Charpy, Izod, and
tensile impact machines. The potential energy, E, shall not differ by more than 1 % of the nominal value
given in Table 2. It shall be determined as follows:
a) Support the pendulum at an arbitrary length, L , from the axis of rotation, on a balance or
H
dynamometer. Ensure that the line from the axis of rotation to the centre of gravity of the pendulum
is horizontal [see Figure 1a)].
b) Measure the vertical force, F , in newtons, at L and the length, L , in metres, to a precision
H H H
of ±1,0 %.
c) Calculate the horizontal moment, M , of the pendulum about the axis of rotation, in newton metres,
H
using the formula:
M = F L (1)
H H H
d) Measure the release angle, α [see Figure 1b)], to a precision Δα , which corresponds to a relative
0 0
precision of 1/400th of the potential energy, E, and, if applicable, the impact angle, α , to within
I
0,25°. Thus, for starting angles of 140°, 150°, and 160°, Δα is 0,39°, 0,54°, and 0,81°, respectively.
e) Calculate the potential energy, E, of the pendulum from the following formula:
EM=−(cosααcos) (2)
H0I
where
E is the potential energy of the pendulum, in joules;
M is the horizontal moment of the pendulum [see Formula (2)], in newton metres;
H
α is the release angle, in degrees;
α is the impact angle, in degrees.
Ι
NOTE 1 Most pendulum impact-testing machines use an impact angle of 0°, for which cos α = 1.
Ι
NOTE 2 In certain cases, it may be necessary to remove the pendulum from the machine to determine its
moment, M , by the method described.
H
ISO 13802:2015(E)
Table 2 — Basic characteristics of Charpy, tensile, and Izod impact-testing machines
Nominal potential  Type of test Impact velocity Maximum permissible
energy losses due to friction with-
out test specimen
E v % of E
Ι
J m/s
0,5 Charpy 4
1,0 Charpy 2
2,0 Charpy/Tensile 2,9 (±10 %) 1
4,0 Charpy/Tensile 0,5
5,0 Charpy 0,5
7,5 Charpy/Tensile
15 Charpy/Tensile
3,8 (±10 %) 0,5
25 Charpy/Tensile
50 Charpy/Tensile
1,0 Izod 2
2,75 Izod 1
5,5 Izod 3,5 (±10 %) 0,5
11 Izod 0,5
22 Izod 0,5
6.2.9  Pendulum length, L
P
The pendulum length, L shall be certified by the manufacturer at the time of manufacture. Under
P,
normal conditions, it should not change but it shall be verified, if repaired or replaced, as part of the
calibration procedure. The pendulum length shall be determined for each available pendulum.
Determine the pendulum length to within the precision specified (see Table 3).
The pendulum length is verified by measuring the period of oscillation (time of swing), T , of the
P
pendulum. Raise the pendulum and release from a height that results in a swing of a maximum of 5°, on
average, and measuring the time of a complete swing in seconds. Determine the period of oscillation as
the mean value of four determinations.
Table 3 — Examples of minimum number of oscillations for determination of T
P
L T Accuracy of time Minimum num-
P P
measurement ber of oscilla-
tions
m s s n
0,225 0,95 0,1 50
0,01 10
0,390 1,25 0,1 50
0,01 10
NOTE Hand-held stopwatches are generally considered to have an accuracy of 0,1 s. Integrated electronic
timing devices are required to give greater accuracy of time measurement.
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ISO 13802:2015(E)
Determine the pendulum length, L , from the period of oscillation, T , of the pendulum using Formula (3):
P P
gT
P
L = (3)
P
4π
where
T is the period of oscillation of the pendulum, in seconds;
P
g is taken as equal to 9,81 m/s , however, if the local acceleration of gravity is known or is be-
lieved to be significantly different from 9,81 m/s , the local acceleration of gravity shall be used;
π is taken as equal to 9,87.
Therefore, in meters, L = 0,2485 T .
P
P
The value of T shall be determined to a precision of 0,5 %.
P
6.2.10 Impact length, L
Ι
The impact length, L (3.8), shall be within 1 % of the pendulum length, L , as determined from the
Ι P
period of oscillation, T , of the pendulum [see Formula (3) and Figure 1a)].
P
6.2.11 Velocity of the pendulum at instant of impact, v,
Ι
The impact velocity, v , shall have the value given in Table 4 for Charpy, Izod, and tensile impact testing,
Ι
respectively.
Determine the impact velocity using Formula (4):
vg=−2 L (cosααcos) (4)
II I 0
where
v is the impact velocity, in metres per second;
Ι
g may be taken as 9,81 m/s (to save measurement at the site of each testing machine);
L is the impact length, in metres;
Ι
α is the release angle, in degrees;
α is the impact angle, in degrees.
Ι
NOTE In most cases, the impact angle is 0°, i.e. cos α = 1.
Ι
ISO 13802:2015(E)
L
a) Quantities for determining the horizontal moment
L
b) Quantities for scale calibration and potential energy calculations
Key
1 axis of rotation 4 angle of rise, α
R
2 vertical force, F 5 release angle, α
H 0
3 centre of percussion 6 arbitrary length from the axis of rotation, that
the pendulum is supported on a balance or
dynamometer, L
H
Figure 1 — Quantities necessary for energy verification
6.3  Charpy testing machines
Inspection and verification of Charpy machines (see Figure A.1 and Table A.1) shall consist of the
following:
6.3.1  Position of anvils, relative to striking edge.
The clearance between the anvils and the striker, or any adjacent part of the pendulum that pass
between the anvils, should be sufficient to ensure that the broken specimen is free to leave the machine
with the minimum of interference, thus, preventing the possibility of the specimen rebounding into
the pendulum. Any end stop used for locating the test specimen in the anvils should not impede the
movement of the specimen during the test.
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ISO 13802:2015(E)
6.3.2  Contact between Charpy striker and specimen.
6.3.3  Angle between the line of contact of the striker and the horizontal axis of the Izod/Charpy
impact reference specimen (see Figure A.1).
6.3.4  Angle of striker, θ .
6.3.5  Radius of striking edge, R .
6.3.6  Parallelism (Orientation) of supports, p .
6.3.7  Radius of anvils, R .
6.3.8  Angle of taper of anvils, θ .
6.3.9  Angle of slope of anvils, θ .
6.3.10 Angle between supports and anvils surfaces, θ .
6.3.11 Span between the supports.
NOTE The span between the supports varies with specimen type.
6.3.12 Location of notch.
If means is provided for locating the test specimen, it shall ensure that the plane of symmetry of the
notch lies within ±0,5 mm of the centre of the gap between the specimen anvils.
NOTE One type of a gauge that can be used to check the distance between the anvils and their alignment
relative to the striking edge is shown in Annex F.
6.4  Izod testing machines
Inspection and verification of Izod machines (see Figure B.1 and Table B.1) shall consist of the following:
6.4.1  Line of contact of the striker
6.4.2  Striking edge of pendulum for Izod test machines. The striker or tup shall conform to all of
the requirements listed below.
6.4.2.1  Radius, R . The striking edge of the striker or tup shall have a cylindrical surface with its axis
horizontal and perpendicular to the plane of motion of the pendulum.
6.4.2.2 Angle relative to the longitudinal axis of the Izod/Charpy impact reference specimen, θ . When
it contacts the Izod/Charpy impact reference specimen, the striking edge, which shall be centred and
extended beyond both sides of the Izod/Charpy reference specimen.
6.4.2.3  Parallelism, p , with face of Izod/Charpy impact reference specimen (over full width).
ISO 13802:2015(E)
6.4.3  Specimen vice. Vice (clamping and support blocks) designed to hold the test specimen in Izod
machines (see Figure B.1) shall conform to all of the requirements listed below.
6.4.3.1  Parallelism of vice faces in horizontal and vertical direction. With an Izod/Charpy impact
reference specimen clamped in place, the vice faces shall be parallel in both the horizontal and the
vertical direction, p .
6.4.3.2  Horizontality of the top surface of the vice, relative to reference plane, p .
6.4.3.3  Angle between the faces of the support block/clamping block and top surface of vice, θ .
NOTE In addition, use a straight edge and a hand-held light to check for wear. Any indication of light between
the straight edge and the support block indicates that the support block is worn and that it needs to be replaced.
6.4.3.4 Radius of support block. Verify the top edge of the support, about which bending takes
place, R .
6.4.3.5 Location of striking edge above top surface of support, D .
6.4.4  Location of specimen and striker
When a reference specimen is located in the vice and clamped so that it is attached rigidly to the frame,
the following requirements shall be conformed to:
a) top surface of the support block shall be parallel, to within 3/1 000, to the reference plane of the
machine;
b) longitudinal axis of the specimen shall be perpendicular, to within ±0,5°, to the top surface of the
support block;
c) notch, which shall face the striker, shall be perpendicular to the plane of swing of the pendulum,
and the plane of symmetry of the notch shall coincide with the top surface of the support block,
both within ±0,1 mm;
d) when it contacts the specimen, the striking edge, which shall be sufficiently wide to extend beyond
both sides of the specimen, shall be perpendicular, to within ±2°, to the longitudinal axis of the
specimen and parallel, to within 0,025 mm (= 0,36°), to the face of the specimen, over the full width
of the specimen.
6.4.5  Vice faces
With a specimen clamped in place, the vice faces shall be parallel, to within 4/1 000, in both the
horizontal and the vertical direction.
6.5  Tens
...