EN ISO 5173:2010

SLOVENSKI STANDARD
01-december-2010
1DGRPHãþD
SIST EN 910:1998
Porušitveno preskušanje zvarnih spojev na kovinskih materialih - Upogibni
preskusi (ISO 5173:2009)
Destructive tests on welds in metallic materials - Bend tests (ISO 5173:2009)
Zerstörende Prüfungen von Schweißnähten an metallischen Werkstoffen -
Biegeprüfungen (ISO 5173:2009)
Essais destructifs des soudures sur matériaux métalliques - Essais de pliage (ISO
5173:2009)
Ta slovenski standard je istoveten z: EN ISO 5173:2010
ICS:
25.160.40 Varjeni spoji in vari Welded joints
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 5173
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2010
ICS 25.160.40 Supersedes EN 910:1996
English Version
Destructive tests on welds in metallic materials - Bend tests
(ISO 5173:2009)
Essais destructifs des soudures sur matériaux métalliques - Zerstörende Prüfungen von Schweißnähten an
Essais de pliage (ISO 5173:2009) metallischen Werkstoffen - Biegeprüfungen (ISO
5173:2009)
This European Standard was approved by CEN on 18 March 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 5173:2010: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
The text of ISO 5173:2009 has been prepared by Technical Committee ISO/TC 44 “Welding and allied
processes” of the International Organization for Standardization (ISO) and has been taken over as EN ISO
5173:2010 by Technical Committee CEN/TC 121 “Welding” the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by October 2010, and conflicting national standards shall be withdrawn at
the latest by October 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 910:1996.
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 5173:2009 has been approved by CEN as a EN ISO 5173:2010 without any modification.

INTERNATIONAL ISO
STANDARD 5173
Third edition
2009-06-15
Destructive tests on welds in metallic
materials — Bend tests
Essais destructifs des soudures sur matériaux métalliques — Essais de
pliage
Reference number
ISO 5173:2009(E)
©
ISO 2009
ISO 5173:2009(E)
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ii © ISO 2009 – All rights reserved

ISO 5173:2009(E)
Contents Page
Foreword. iv
1 Scope .1
2 Terms and definitions .1
3 Principle.2
4 Symbols and abbreviated terms .2
4.1 Symbols .2
4.2 Abbreviated terms .2
4.3 Figures corresponding to the abbreviations .3
5 Preparation of test specimens .6
5.1 General.6
5.2 Location .6
5.3 Marking .6
5.4 Heat treatment and/or ageing.6
5.5 Extraction .7
5.6 Specimen size .7
6 Conditions of testing.10
6.1 Etching.10
6.2 Testing .10
6.3 Diameter of former and roller .16
6.4 Distance between rollers .16
6.5 Bending angle .16
6.6 Bending elongation .16
7 Test results.16
8 Test report .17
Annex A (informative) Example of a test report .18

ISO 5173:2009(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 5173 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 5, Testing and inspection of welds.
This third edition cancels and replaces the second edition (ISO 5173:2000) which has been technically
revised.
Requests for official interpretations of any aspect of this International Standard should be directed to the
Secretariat of ISO/TC 44/SC 5 via your national standards body, of which a complete listing can be found at
www.iso.org.
iv © ISO 2009 – All rights reserved

INTERNATIONAL STANDARD ISO 5173:2009(E)

Destructive tests on welds in metallic materials — Bend tests
1 Scope
This International Standard specifies a method for making transverse root, face and side bend tests on test
specimens taken from butt welds, butt welds with cladding (subdivided into welds in clad plates and clad
welds) and cladding without butt welds, in order to assess ductility and/or absence of imperfections on or near
the surface of the test specimen. It also gives the dimensions of the test specimen.
In addition, this International Standard specifies a method for making longitudinal root and face bend tests to
be used instead of transverse bend tests for heterogeneous assemblies when base materials and/or filler
metal have a significant difference in their physical and mechanical properties in relation to bending.
This International Standard applies to metallic materials in all forms of product with welded joints made by any
fusion arc welding process.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
transverse face bend test specimen for a butt weld
TFBB
specimen for which the surface in tension is the side that contains the greater width of the weld or the side
from which the welding arc was first applied, applicable to transverse butt weld specimens
See Figure 1.
2.2
transverse root bend test specimen for a butt weld
TRBB
specimen for which the surface in tension is the side opposite to that of the face butt weld bend test specimen,
applicable to transverse butt weld specimens
See Figure 2.
2.3
transverse side bend test specimen for a butt weld
SBB
specimen for which the surface in tension is a cross-section of the weld
See Figure 3.
2.4
longitudinal face test specimen for a butt weld
root bend test specimen for a butt weld
LFBB
LRBB
specimen whose direction is parallel to butt weld direction, applicable to face and root bend specimens
See Figure 4.
ISO 5173:2009(E)
2.5
face bend test specimen for cladding without a butt weld
FBC
specimen for which the cladding is in tension, applicable to both transverse and longitudinal specimens
See Figure 5.
2.6
side bend test specimen for cladding without a butt weld
SBC
specimen for which the cross-section of the cladding overlay is in tension, applicable to both transverse and
longitudinal specimens
See Figure 6.
2.7
face bend test specimen for cladding with a butt weld
side bend test specimen for cladding with a butt weld
FBCB
SBCB
specimen for which the cladding is in tension or for which the cross-section of the cladding overlay is in
tension and which contains a butt weld
See Figures 7 and 8.
3 Principle
Submitting a test specimen, taken transversely or longitudinally from a welded joint, to plastic deformation by
bending it, without reversing the bending direction, in such a way that one of the surfaces or cross-sections of
the welded joint is in tension.
Unless otherwise specified, the test shall be carried out at an ambient temperature of (23 ± 5) °C.
The test shall be made in accordance with one of the methods described in Clause 6.
4 Symbols and abbreviated terms
4.1 Symbols
See Table 1 and Figures 1 to 15.
4.2 Abbreviated terms
TFBB Transverse face bend test specimen for a butt weld
TRBB Transverse root bend test specimen for a butt weld
SBB Transverse side bend test specimen for a butt weld
LFBB Longitudinal face bend test specimen for a butt weld
LRBB Longitudinal root bend test specimen for a butt weld
FBC Face bend test specimen for cladding without a butt weld
SBC Side bend test specimen for cladding without a butt weld
FBCB Face bend test specimen for cladding with a butt weld
SBCB Side bend test specimen for cladding with a butt weld
2 © ISO 2009 – All rights reserved

ISO 5173:2009(E)
Table 1 — Symbols and designations
Symbol Designation Unit
A
minimum percentage elongation after fracture required by the material specification %
b
width of the test specimen mm
b
width of outside fusion line mm
d
diameter of the former or the inner roller mm
a
D mm
outside diameter of the pipe
l distance between the rollers mm
L
initial distance between contact of the roller and the centre line of the weld mm
f
L
original gauge length mm
o
L
maximum width of the weld after machining mm
s
L
total length of the test specimen mm
t
r radius of the test specimen edges mm
R radius of the rollers mm
t thickness of the test piece mm
t
thickness of the cladding mm
c
t
thickness of the test specimen mm
s
t
thickness of base material under cladding mm
w
α bending angle °
a
The term “pipe”, alone or in combination, is used to mean “pipe”, “tube” or “hollow section (without rectangular cross
section)”.
4.3 Figures corresponding to the abbreviations
Figures 1 to 8 represent bend test specimens for butt welds and cladding.

Figure 1 — Transverse face bend test specimen for a butt weld (TFBB)
...