EN ISO 179-1:2010

SLOVENSKI STANDARD
01-september-2010
1DGRPHãþD
SIST EN ISO 179-1:2001
SIST EN ISO 179-1:2001/A1:2005
Polimerni materiali - Ugotavljanje udarne žilavosti pa Charpyju - 1. del: Preskus
udarne žilavosti z neinstrumentalno metodo (ISO 179-1:2010)
Plastics - Determination of Charpy impact properties - Part 1: Non-instrumented impact
test (ISO 179-1:2010)
Kunstststoffe - Bestimmung der Charpy-Schlageigenschaften - Teil 1: Nicht
instrumentierte Schlagzähigkeitsprüfung (ISO 179-1:2010)
Plastiques - Détermination des caractéristiques au choc Charpy - Partie 1: Essai de choc
non instrumenté (ISO 179-1:2010)
Ta slovenski standard je istoveten z: EN ISO 179-1:2010
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.

EUROPEAN STANDARD
EN ISO 179-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2010
ICS 83.080.01 Supersedes EN ISO 179-1:2000
English Version
Plastics - Determination of Charpy impact properties - Part 1:
Non-instrumented impact test (ISO 179-1:2010)
Plastiques - Détermination des caractéristiques au choc Kunstststoffe - Bestimmung der Charpy-
Charpy - Partie 1: Essai de choc non instrumenté (ISO 179- Schlageigenschaften - Teil 1: Nicht instrumentierte
1:2010) Schlagzähigkeitsprüfung (ISO 179-1:2010)
This European Standard was approved by CEN on 19 May 2010.

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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 179-1:2010: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 179-1:2010) 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 2010, and conflicting national standards shall be withdrawn
at the latest by December 2010.
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 179-1:2000.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 179-1:2010 has been approved by CEN as a EN ISO 179-1:2010 without any modification.

INTERNATIONAL ISO
STANDARD 179-1
Second edition
2010-06-15
Plastics — Determination of Charpy
impact properties —
Part 1:
Non-instrumented impact test
Plastiques — Détermination des caractéristiques au choc Charpy —
Partie 1: Essai de choc non instrumenté

Reference number
ISO 179-1:2010(E)
©
ISO 2010
ISO 179-1:2010(E)
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ii © ISO 2010 – All rights reserved

ISO 179-1:2010(E)
Contents Page
Foreword .iv
1 Scope.1
2 Normative references.2
3 Terms and definitions .2
4 Principle.3
5 Apparatus.3
5.1 Test machine.3
5.2 Micrometers and gauges .3
6 Test specimens.4
6.1 Preparation.4
6.1.1 Moulding and extrusion compounds .4
6.1.2 Sheets.4
6.1.3 Long-fibre-reinforced materials .4
6.1.4 Checking.7
6.1.5 Notching .7
6.2 Anisotropy.7
6.3 Shape and dimensions .8
6.3.1 Materials not exhibiting interlaminar shear fracture .8
6.3.2 Materials exhibiting interlaminar shear fracture (e.g. long-fibre-reinforced materials).9
6.4 Number of test specimens.9
6.5 Definition of span between specimen supports, L .10
6.6 Conditioning .11
7 Procedure.11
8 Calculation and expression of results .12
8.1 Unnotched specimens .12
8.2 Notched specimens.12
8.3 Statistical parameters .13
8.4 Significant figures .13
9 Precision.13
10 Test report.13
Annex A (informative) Additional methods for investigating the influence of surface effects.15
Annex B (informative) Precision data .17
Annex C (informative) Determining the notch tip radius using a CCD microscope .19
Bibliography.22

ISO 179-1:2010(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 179-1 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical
properties.
This second edition cancels and replaces the first edition (ISO 179-1:2000), which has been technically
revised. The main changes are as follows:
⎯ a new subclause (6.5) has been added, defining the span between the specimen supports and indicating
a convenient position at which it can be measured;
⎯ a new annex, Annex C, has been added, giving a method of measuring the radius of the notch in a
notched specimen.
This second edition also incorporates the Amendment ISO 179-1:2000/Amd.1:2005.
ISO 179 consists of the following parts, under the general title Plastics — Determination of Charpy impact
properties:
⎯ Part 1: Non-instrumented impact test
⎯ Part 2: Instrumented impact test

iv © ISO 2010 – All rights reserved

INTERNATIONAL STANDARD ISO 179-1:2010(E)

Plastics — Determination of Charpy impact properties —
Part 1:
Non-instrumented impact test
1 Scope
1.1 This part of ISO 179 specifies a method for determining the Charpy impact strength of plastics under
defined conditions. A number of different types of specimen and test configurations are defined. Different test
parameters are specified according to the type of material, the type of test specimen and the type of notch.
1.2 The method can be used to investigate the behaviour of specified types of specimen under the impact
conditions defined and for estimating the brittleness or toughness of specimens within the limitations inherent
in the test conditions. It can also be used for the determination of comparative data from similar types of
material.
[1]
1.3 The method has a greater range of applicability than that given in ISO 180 and is more suitable for
the testing of materials showing interlaminar shear fracture or of materials exhibiting surface effects due to
environmental factors.
1.4 The method is suitable for use with the following range of materials:
⎯ rigid thermoplastic moulding and extrusion materials (including filled and reinforced compounds in
addition to unfilled types) and rigid thermoplastics sheets;
⎯ rigid thermosetting moulding materials (including filled and reinforced compounds) and rigid thermosetting
sheets (including laminates);
⎯ fibre-reinforced thermosetting and thermoplastic composites incorporating unidirectional or multi-
directional reinforcements (such as mats, woven fabrics, woven rovings, chopped strands, combination
and hybrid reinforcements, rovings and milled fibres) or incorporating sheets made from pre-impregnated
materials (prepregs), including filled and reinforced compounds;
⎯ thermotropic liquid-crystal polymers.
1.5 Notched samples are not normally suitable for use with rigid cellular materials, long-fibre-reinforced
composites or thermotropic liquid-crystal polymers. In these cases, unnotched samples may be used.
1.6 The method is suited to the use of specimens moulded to the chosen dimensions, machined from the
central portion of a standard multipurpose test specimen (see ISO 3167) or machined from finished or
semifinished products such as mouldings, laminates and extruded or cast sheet.
1.7 The method specifies preferred dimensions for the test specimen. Tests which are carried out on
specimens of different dimensions or with different notches, or specimens which are prepared under different
conditions, might produce results which are not comparable. Other factors, such as the energy capacity of the
apparatus, the impact velocity and the conditioning of the specimens can also influence the results.
Consequently, when comparative data are required, these factors must be carefully controlled and recorded.
ISO 179-1:2010(E)
1.8 The method should not be used as a source of data for design calculations. Information on the typical
behaviour of a material can be obtained, however, by testing at different temperatures, by varying the notch
radius and/or the specimen thickness and by testing specimens prepared under different conditions.
2 Normative references
The following referenced documents are indispensable for the application 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 291, Plastics — Standard atmospheres for conditioning and testing
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 294-3, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 3: Small plates
ISO 295, Plastics — Compression moulding of test specimens of thermosetting materials
ISO 1268-11, Fibre-reinforced plastics — Methods of producing test plates — Part 11: Injection moulding of
BMC and other long-fibre moulding compounds — Small plates
ISO 2602, Statistical interpretation of test results — Estimation of the mean — Confidence interval
ISO 2818, Plastics — Preparation of test specimens by machining
ISO 3167, Plastics — Multipurpose test specimens
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 13802, Plastics — Verification of pendulum impact-testing machines — Charpy, Izod and tensile
impact-testing
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
Charpy unnotched impact strength
a
cU
impact energy absorbed in breaking an unnotched specimen, referred to the original cross-sectional area of
the specimen
NOTE It is expressed in kilojoules per square metre (kJ/m ).
3.2
Charpy notched impact strength
a
cN
impact energy absorbed in breaking a notched specimen, referred to the original cross-sectional area of the
specimen at the notch, where N = A, B or C, depending on the notch type (see 6.3.1.1.2)
NOTE It is expressed in kilojoules per square metre (kJ/m ).
2 © ISO 2010 – All rights reserved

ISO 179-1:2010(E)
3.3
edgewise impact
e
direction of blow parallel to the dimension b, with impact on the narrow longitudinal surface h × l of the
specimen (see Figure 1, left, and Figures 2 and 4)
3.4
flatwise impact
f
direction of blow parallel to the dimension h, with impact on the broad longitudinal surface b × l of the
specimen (see Figure 1, right, and Figures 3 and 4)
3.5
normal impact
n
〈laminar-reinforced plastics〉 impact with the direction of blow normal to the plane of reinforcement (see
Figure 4)
3.6
parallel impact
p
〈laminar-reinforced plastics〉 impact with the direction of blow parallel to the plane of reinforcement (see
Figure 4)
4 Principle
The test specimen, supported near its ends as a horizontal beam, is impacted by a single blow of a striker,
with the line of impact midway between the supports, and bent at a high, nominally constant, velocity.
In the case of edgewise impact with notched specimens, the line of impact is directly opposite the single notch
(see Figure 1, left, and Figure 2).
5 Apparatus
5.1 Test machine
The principles, characteristics and verification of suitable test machines are detailed in ISO 13802.
ISO 13802 describes partial verification and full verification. In the case of full verification, some items are
difficult to verify when the apparatus is assembled. Such verifications are assumed to be incumbent on the
manufacturer.
5.2 Micrometers and gauges
Micrometers and gauges capable of measuring the essential dimensions of test specimens to an accuracy of
0,02 mm are required. For measuring the dimension b of notched specimens, the micrometer shall have a
N
spindle with a measuring tip having a suitable profile to fit the shape of the notch.
ISO 179-1:2010(E)
a)  Edgewise impact b)  Flatwise impact
Key
1 direction of blow
2 rod of pendulum
3 test specimen
4 notch
5 support
Figure 1 — Striking edge and support blocks for type 1 test specimen at moment of impact
6 Test specimens
6.1 Preparation
6.1.1 Moulding and extrusion compounds
Specimens shall be prepared in accordance with the relevant material specification. The specimens shall be
either directly compression moulded in accordance with ISO 293 or ISO 295 or injection moulded from the
material in accordance with ISO 294-1, ISO 294-3 or ISO 10724-1, as appropriate, or machined in accordance
with ISO 2818 from sheet that has been compression or injection moulded from the compound. Type 1
specimens may be cut from multipurpose test specimens complying with ISO 3167, type A.
6.1.2 Sheets
Specimens shall be machined from sheets in accordance with ISO 2818.
6.1.3 Long-fibre-reinforced materials
A panel shall be prepared in accordance with ISO 1268-11 or another specified or agreed upon preparation
procedure. Specimens shall be machined in accordance with ISO 2818.
4 © ISO 2010 – All rights reserved

ISO 179-1:2010(E)
Key
1 direction of blow
Figure 2 — Charpy edgewise impact (e) with single-notched specimen

Key
1 direction of blow
Figure 3 — Charpy flatwise impact (f)
ISO 179-1:2010(E)
Key
1 direction of blow
Edgewise (e) and flatwise (f) indicate the direction of the blow with respect to the specimen thickness, h, and specimen
width, b. Normal (n) and parallel (p) indicate the direction of the blow with respect to the laminate plane.
The Charpy “fn” and “ep” tests are used for laminates, while both the Charpy “en” and “ep” tests are used for other
materials. The Charpy “fn” and “fp” tests are used for testing materials exhibiting surface effects.
Figure 4 — Scheme of designations describing the direction of blow
6 © ISO 2010 – All rig
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