ISO/DIS 5173

Destructive tests on welds in metallic materials -- Bend tests

Essais destructifs des soudures sur matériaux métalliques -- Essais de pliage

Standards Content (sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 5173
ISO/TC 44/SC 5 Secretariat: AFNOR
Voting begins on: Voting terminates on:
2017-04-11 2017-07-03
Destructive tests on welds in metallic materials — Bend
tests
Essais destructifs des soudures sur matériaux métalliques — Essais de pliage
ICS: 25.160.40
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 5173:2017(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2017
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ISO/DIS 5173:2017(E) ISO/DIS 5173:2017(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 ................................................................................................................................. 3

4.3 Figures corresponding to the abbreviations ............................................................................... 4

5 Preparation of test specimens ........................................................................................................... 6

5.1 General ...................................................................................................................................................... 6

5.2 Location ..................................................................................................................................................... 6

5.3 Marking ..................................................................................................................................................... 7

5.4 Heat treatment and/or ageing .......................................................................................................... 7

5.5 Extraction ................................................................................................................................................. 7

5.6 Specimen size .......................................................................................................................................... 7

6 Conditions of testing .......................................................................................................................... 11

6.1 Etching .................................................................................................................................................... 11

6.2 Testing .................................................................................................................................................... 11

6.3 Diameter of former and roller ....................................................................................................... 17

6.4 Distance between rollers ................................................................................................................. 17

6.5 Bending angle....................................................................................................................................... 17

6.6 Bending elongation ............................................................................................................................ 17

7 Test results ............................................................................................................................................ 18

8 Test report ............................................................................................................................................ 18

(informative) Example of a test report ................................................................................... 19

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ii © ISO 2017 – All rights reserved
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ISO/DIS 5173:2017(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 ................................................................................................................................. 3

4.3 Figures corresponding to the abbreviations ............................................................................... 4

5 Preparation of test specimens ........................................................................................................... 6

5.1 General ...................................................................................................................................................... 6

5.2 Location ..................................................................................................................................................... 6

5.3 Marking ..................................................................................................................................................... 7

5.4 Heat treatment and/or ageing .......................................................................................................... 7

5.5 Extraction ................................................................................................................................................. 7

5.6 Specimen size .......................................................................................................................................... 7

6 Conditions of testing .......................................................................................................................... 11

6.1 Etching .................................................................................................................................................... 11

6.2 Testing .................................................................................................................................................... 11

6.3 Diameter of former and roller ....................................................................................................... 17

6.4 Distance between rollers ................................................................................................................. 17

6.5 Bending angle....................................................................................................................................... 17

6.6 Bending elongation ............................................................................................................................ 17

7 Test results ............................................................................................................................................ 18

8 Test report ............................................................................................................................................ 18

(informative) Example of a test report ................................................................................... 19

© ISO 2017 – All rights reserved
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ISO/DIS 5173:2017(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 World Trade Organization (WTO)

principles in the Technical Barriers to Trade (TBT) see the following URL:
www.iso.org/iso/foreword.html.

The committee responsible for this document is ISO/TC 44, Welding and allied processes, Subcommittee

SC 5, Testing and inspection of welds.

This edition cancels and replaces the thrid edition (ISO 5173:2009+Amd 1:2011) which has been

technically revised.
© ISO 2017 – All rights reserved
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ISO/DIS 5173:2017(E)
DRAFT INTERNATIONAL STANDARD ISO/DIS 5173:2017(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

Destructive tests on welds in metallic materials — Bend tests

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

1 Scope

collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

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

The procedures used to develop this document and those intended for its further maintenance are

clad welds) and cladding without butt welds, in order to assess ductility and/or absence of imperfections

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

on or near the surface of the test specimen. It also gives the dimensions of the test specimen.

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).

In addition, this International Standard specifies a method for making longitudinal root and face bend

Attention is drawn to the possibility that some of the elements of this document may be the subject of tests to be used instead of transverse bend tests for heterogeneous assemblies when base materials

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any and/or filler metal have a significant difference in their physical and mechanical properties in relation to

patent rights identified during the development of the document will be in the Introduction and/or on bending.

the ISO list of patent declarations received (see www.iso.org/patents).

This International Standard applies to metallic materials in all forms of product with welded joints made

Any trade name used in this document is information given for the convenience of users and does not by any welding process.

constitute an endorsement.
2 Terms and definitions

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 World Trade Organization (WTO)

For the purposes of this document, the following apply.
principles in the Technical Barriers to Trade (TBT) see the following URL:
www.iso.org/iso/foreword.html. 2.1
transverse face bend test specimen for a butt weld

The committee responsible for this document is ISO/TC 44, Welding and allied processes, Subcommittee

TFBB
SC 5, Testing and inspection of welds.

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

This edition cancels and replaces the thrid edition (ISO 5173:2009+Amd 1:2011) which has been

technically revised.
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.
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ISO/DIS 5173:2017(E)
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.
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 between 10 °C and

35 °C. Tests carried out under controlled conditions, where required, shall be made at 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.
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ISO/DIS 5173:2017(E) ISO/DIS 5173:2017(E)
2.4
4.2 Abbreviated terms

longitudinal face test specimen for a butt weld root bend test specimen for a butt weld

LFBB
TFBB Transverse face bend test specimen for a butt weld
LRBB

specimen whose direction is parallel to butt weld direction, applicable to face and root bend specimens

TRBB Transverse root bend test specimen for a butt weld
See Figure 4.
SBB Transverse side bend test specimen for a butt weld
2.5
LFBB Longitudinal face bend test specimen for a butt weld
face bend test specimen for cladding without a butt weld
FBC LRBB Longitudinal root bend test specimen for a butt weld

specimen for which the cladding is in tension, applicable to both transverse and longitudinal specimens

FBC Face bend test specimen for cladding without a butt weld
See Figure 5.
SBC Side bend test specimen for cladding without a butt weld
2.6
FBCB Face bend test specimen for cladding with a butt weld
side bend test specimen for cladding without a butt weld
SBC
SBCB Side bend test specimen for cladding with a butt weld

specimen for which the cross-section of the cladding overlay is in tension, applicable to both transverse

and longitudinal specimens
Table 1 — Symbols and designations
See Figure 6.
Symbol Designation Unit

A minimum percentage elongation after fracture required by the material specification %

2.7

face bend test specimen for cladding with a butt weld side bend test specimen for cladding with a

b width of the test specimen mm
butt weld
b width of outside fusion line mm
FBCB
SBCB
d diameter of the former or the inner roller mm

specimen for which the cladding is in tension or for which the cross-section of the cladding overlay

D mm
outside diameter of the pipe
is in tension and which contains a butt weld
l distance between the rollers mm
See Figures 7 and 8.

L initial distance between contact of the roller and the centre line of the weld mm

L original gauge length mm
3 Principle
L maximum width of the weld after machining mm

Submitting a test specimen, taken transversely or longitudinally from a welded joint, to plastic

L total length of the test specimen mm

deformation by bending it, without reversing the bending direction, in such a way that one of the surfaces t

or cross-sections of the welded joint is in tension.
r radius of the test specimen edges mm
R radius of the rollers mm

Unless otherwise specified, the test shall be carried out at an ambient temperature of between 10 °C and

35 °C. Tests carried out under controlled conditions, where required, shall be made at temperature of t thickness of the test piece mm

(23 ± 5) °C.
t thickness of the cladding mm

The test shall be made in accordance with one of the methods described in Clause 6. t thickness of the test specimen mm

t thickness of base material under cladding mm
4 Symbols and abbreviated terms
α bending angle °
4.1 Symbols

The term “pipe”, alone or in combination, is used to mean “pipe”, “tube” or “hollow section (without

rectangular cross section)”.
See Table 1 and Figures 1 to 15.
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ISO/DIS 5173:2017(E)
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)
Figure 2 — Transverse root bend test specimen for a butt weld (TRBB)
Figure 3 — Transverse side bend test specimen for a butt weld (SBB)
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ISO/DIS 5173:2017(E) ISO/DIS 5173:2017(E)
4.3 Figures corresponding to the abbreviations
Figures 1 to 8 represent bend test specimens for butt welds and cladding.
Figure 4 — Longitudinal bend test specimen for a butt weld (LFBB and LRBB)
Figure 1 — Transverse face bend test specimen for a butt weld (TFBB)
Figure 5 — Face bend test specimen for cladding without a butt weld (FBC)
Figure 2 — Transverse root bend test specimen for a butt weld (TRBB)
Figure 6 — Side bend test specimen for cladding without a butt weld (SBC)
Figure 3 — Transverse side bend test specimen for a butt weld (SBB)
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ISO/DIS 5173:2017(E)
Figure 7 — Face bend test specimen for cladding with a butt weld (FBCB)
Figure 8 — Side bend test specimen for cladding with a butt weld (SBCB)
5 Preparation of test specimens
5.1 General

Specimens shall be prepared in such a manner that the preparation does not affect either the base

material or the weld metal.
5.2 Location

For transverse bend testing of butt welds, the test specimen shall be taken transversely from the welded

joint of the manufactured product or from the welded test piece in such a way that after machining the

weld axis will remain in the centre of the test specimen or at a suitable position for testing.

For longitudinal bend testing of butt welds, the test specimen shall be taken longitudinally from the

welded joint of the manufactured product or from the welded test piece.

The location and orientation of bend test specimens of cladding material shall be specified by the

application standard or by agreement between the contracting parties.
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ISO/DIS 5173:2017(E) ISO/DIS 5173:2017(E)
5.3 Marking

Each test piece shall be marked to identify its exact location in the manufactured product or in the joint

from which it has been removed.

If required by the relevant application standard, the direction of working (e.g. rolling or extrusion) shall

be marked.

Each test specimen shall be marked to identify its exact location in the test piece from which it has been

removed.
5.4 Heat treatment and/or ageing

No heat treatment shall be applied to the welded joint or to the test specimen unless it is specified or

permitted by the relevant application standard dealing with the welded joint to be tested. Details of any

heat treatment shall be recorded in the test report. If natural ageing of aluminium alloys takes place, the

time between welding and testing shall be recorded.
Figure 7 — Face bend test specimen for cladding with a butt weld (FBCB)
5.5 Extraction
5.5.1 General

The mechanical or thermal processes used to extract the test specimen shall not change the properties of

the test specimen in any way. It is permissible to mechanically remove any material that is affected by

thermal cutting provided the finished dimensions of the specimens required by this International

Standard are met.
5.5.2 Steel
Figure 8 — Side bend test specimen for cladding with a butt weld (SBCB)

Shearing shall not be used for thicknesses > 8 mm. If thermal cutting or other cutting methods which

could affect the cut surfaces are used to extract the test specimen from the welded plate, or from the test

5 Preparation of test specimens

piece, the cuts shall be made at a distance ≥ 3 mm from the test specimen but in any case sufficient

(depending on the process used) not to introduce metallurgical effects which could affect the test results.

5.1 General
5.5.3 Other metallic materials

Specimens shall be prepared in such a manner that the preparation does not affect either the base

material or the weld metal. Sheared or thermal cut surfaces are not permitted on bend specimens; only machining (e.g. sawing,

grinding or milling) shall be used.
5.2 Location
5.6 Specimen size

For transverse bend testing of butt welds, the test specimen shall be taken transversely from the welded

5.6.1 Transverse root and face bend tests of a butt weld (TFBB and TRBB)

joint of the manufactured product or from the welded test piece in such a way that after machining the

weld axis will remain in the centre of the test specimen or at a suitable position for testing.

See Figures 1, 2 and 9.

For longitudinal bend testing of butt welds, the test specimen shall be taken longitudinally from the

For transverse root and face bend tests, the test specimen thickness, t , shall be equal to the thickness of

welded joint of the manufactured product or from the welded test piece.

the base material adjacent to the welded joint up to a maximum thickness of 30 mm. If the test piece

thickness, t, is greater than 10 mm, the test specimen thickness, t , may be machined or otherwise

The location and orientation of bend test specimens of cladding material shall be specified by the

mechanically finished from one side to a thickness equal to (10 ± 0,5) mm as indicated in Figures 1 and

application standard or by agreement between the contracting parties.
weld shall be in tension when the specimen is bent.
2. The face or root of the

When a relevant application standard requires testing of a full thickness > 10 mm, several test specimens

may be taken in order to cover the full thickness of the joint as indicated in Figure 9.

© ISO 2017 – All rights reserved © ISO 2017 – All rights reserved
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ISO/DIS 5173:2017(E)

In such cases, the location of the test specimen in the welded joint thickness shall be identified.

5.6.2 Transverse side bend tests of a butt weld (SBB)
See Figures 3 and 10.

For side bend tests, the test specimen width, b, shall be equal to the thickness of the base material of the

welded joint. The specimen shall have a thickness, t , of at least (10 ± 0,5) mm, unless otherwise specified

in the relevant application standard.

When the joint thickness exceeds 40 mm, it is permissible to split the specimen in the plane of the test

piece thickness as shown in Figure 10. In these cases the location of the test specimen in the welded joint

thickness shall be identified.
5.6.3 Longitudinal bend tests of a butt weld (LFBB and LRBB)
See Figure 4.

For longitudinal bend tests, the test specimen thickness, t , shall be equal to the thickness of the base

material near the welded joint, but should not exceed 10 mm. If the test piece thickness, t, is greater than

10 mm, the test specimen thickness, t , may be machined or otherwise mechanically finished from one

side to a thickness equal to (10 ± 0,5) mm as indicated in Figure 4. The face or root of the weld shall be in

tension when the specimen is bent.
5.6.4 Face bend tests of cladding material without a butt weld (FBC)
See Figure 5.

For face bend tests, the test specimen thickness, ts, shall be equal to the thickness of the base material

plus the thickness of the cladding, but should not exceed 10 mm. If the test piece thickness, t, is greater

than 10 mm, the test specimen thickness, t , may be machined or otherwise mechanically finished from

the base metal to a thickness equal to (10 ± 0,5) mm as indicated in Figure 5, if cladding thickness permits.

When the thickness of the base material plus cladding is greater than ts, it is permissible to remove base

material in order to produce a test specimen thickness, t , in accordance with the application standard or

as agreed between the contracting parties.
5.6.5 Side bend tests of cladding material without a butt weld (SBC)
See Figure 6.

For side bend tests, the test specimen width, b, shall be equal to the thickness of the base material plus

the thickness of± the cladding, up to a maximum of 40 mm. The specimen shall have a thickness, t , of at

least (10 ± 0,5) mm, unless otherwise specified in the relevant application standard.

© ISO 2017 – All rights reserved
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ISO/DIS 5173:2017(E) ISO/DIS 5173:2017(E)

In such cases, the location of the test specimen in the welded joint thickness shall be identified.

When the thickness of the base material plus cladding exceeds 40 mm, it is permissible to remove base

material to produce a test specimen width, b, in accordance with the relevant application standard or as

5.6.2 Transverse side bend
...

PROJET DE NORME INTERNATIONALE
ISO/DIS 5173
ISO/TC 44/SC 5 Secrétariat: AFNOR
Début de vote: Vote clos le:
2017-04-11 2017-07-03
Essais destructifs des soudures sur matériaux
métalliques — Essais de pliage
Destructive tests on welds in metallic materials — Bend tests
ICS: 25.160.40
CE DOCUMENT EST UN PROJET DIFFUSÉ POUR
OBSERVATIONS ET APPROBATION. IL EST DONC
SUSCEPTIBLE DE MODIFICATION ET NE PEUT

Le présent document est distribué tel qu’il est parvenu du secrétariat du comité.

ÊTRE CITÉ COMME NORME INTERNATIONALE
AVANT SA PUBLICATION EN TANT QUE TELLE.
OUTRE LE FAIT D’ÊTRE EXAMINÉS POUR
ÉTABLIR S’ILS SONT ACCEPTABLES À DES
FINS INDUSTRIELLES, TECHNOLOGIQUES ET
COMMERCIALES, AINSI QUE DU POINT DE VUE TRAITEMENT PARALLÈLE ISO/CEN
DES UTILISATEURS, LES PROJETS DE NORMES
INTERNATIONALES DOIVENT PARFOIS ÊTRE
CONSIDÉRÉS DU POINT DE VUE DE LEUR
POSSIBILITÉ DE DEVENIR DES NORMES
POUVANT SERVIR DE RÉFÉRENCE DANS LA
RÉGLEMENTATION NATIONALE.
Numéro de référence
LES DESTINATAIRES DU PRÉSENT PROJET
ISO/DIS 5173:2017(F)
SONT INVITÉS À PRÉSENTER, AVEC LEURS
OBSERVATIONS, NOTIFICATION DES DROITS
DE PROPRIÉTÉ DONT ILS AURAIENT
ÉVENTUELLEMENT CONNAISSANCE ET À
FOURNIR UNE DOCUMENTATION EXPLICATIVE. ISO 2017
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ISO/DIS 5173:2017(F) ISO/DIS 5173
Sommaire Page

1  Domaine d'application ................................................................................................................................... 1

2  Termes et définitions ..................................................................................................................................... 1

3  Principe ............................................................................................................................................................... 2

4  Symboles et termes abrégés ........................................................................................................................ 2

4.1  Symboles ............................................................................................................................................................. 2

4.2  Termes abrégés ................................................................................................................................................ 3

4.3  Figures correspondant aux termes abrégés .......................................................................................... 4

5  Préparation des éprouvettes ....................................................................................................................... 6

5.1  Généralités ......................................................................................................................................................... 6

5.2  Sens de prélèvement ...................................................................................................................................... 6

5.3  Marquage ............................................................................................................................................................ 7

5.4  Traitement thermique et/ou vieillissement .......................................................................................... 7

5.5  Prélèvement ...................................................................................................................................................... 7

5.6  Taille des éprouvettes .................................................................................................................................... 7

6  Conditions d’essai ......................................................................................................................................... 11

6.1  Attaque chimique ......................................................................................................................................... 11

6.2  Essais ................................................................................................................................................................. 11

6.3  Diamètre du poinçon et du rouleau ....................................................................................................... 16

6.4  Distance entre les rouleaux ...................................................................................................................... 17

6.5  Angle de pliage ............................................................................................................................................... 17

6.6  Allongement au pliage ................................................................................................................................ 17

7  Résultats d’essai ............................................................................................................................................ 17

8  Rapport d’essai .............................................................................................................................................. 18

Annexe A (informative) Exemple d’un rapport d'essai ................................................................................ 19

DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2017, Publié en Suisse

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l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
© ISO 2017 – Tous droits réservés
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ISO/DIS 5173
Sommaire Page

1  Domaine d'application ................................................................................................................................... 1

2  Termes et définitions ..................................................................................................................................... 1

3  Principe ............................................................................................................................................................... 2

4  Symboles et termes abrégés ........................................................................................................................ 2

4.1  Symboles ............................................................................................................................................................. 2

4.2  Termes abrégés ................................................................................................................................................ 3

4.3  Figures correspondant aux termes abrégés .......................................................................................... 4

5  Préparation des éprouvettes ....................................................................................................................... 6

5.1  Généralités ......................................................................................................................................................... 6

5.2  Sens de prélèvement ...................................................................................................................................... 6

5.3  Marquage ............................................................................................................................................................ 7

5.4  Traitement thermique et/ou vieillissement .......................................................................................... 7

5.5  Prélèvement ...................................................................................................................................................... 7

5.6  Taille des éprouvettes .................................................................................................................................... 7

6  Conditions d’essai ......................................................................................................................................... 11

6.1  Attaque chimique ......................................................................................................................................... 11

6.2  Essais ................................................................................................................................................................. 11

6.3  Diamètre du poinçon et du rouleau ....................................................................................................... 16

6.4  Distance entre les rouleaux ...................................................................................................................... 17

6.5  Angle de pliage ............................................................................................................................................... 17

6.6  Allongement au pliage ................................................................................................................................ 17

7  Résultats d’essai ............................................................................................................................................ 17

8  Rapport d’essai .............................................................................................................................................. 18

Annexe A (informative) Exemple d’un rapport d'essai ................................................................................ 19

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ISO/DIS 5173
Avant‐propos

L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes

nationaux de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est

en général confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude a le

droit de faire partie du comité technique créé à cet effet. Les organisations internationales,

gouvernementales et non gouvernementales, en liaison avec l’ISO participent également aux travaux.

L’ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui

concerne la normalisation électrotechnique.

Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont

décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier de prendre note des différents

critères d’approbation requis pour les différents types de documents ISO. Le présent document a été

rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir

www.iso.org/directives).

L’attention est appelée sur le fait que certains des éléments du présent document peuvent faire l’objet

de droits de propriété intellectuelle ou de droits analogues. L’ISO ne saurait être tenue pour

responsable de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails

concernant les références aux droits de propriété intellectuelle ou autres droits analogues identifiés

lors de l’élaboration du document sont indiqués dans l’Introduction et/ou dans la liste des déclarations

de brevets reçues par l’ISO (voir www.iso.org/brevets).

Les appellations commerciales éventuellement mentionnées dans le présent document sont données

pour information, par souci de commodité à l’intention des utilisateurs et ne sauraient constituer un

engagement.

Pour une explication de la nature volontaire des normes, la signification des termes et expressions

spécifiques de l’ISO liés à l’évaluation de la conformité, ou pour toute information au sujet de l’adhésion

de l’ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles

techniques au commerce (OTC) voir le lien suivant: www.iso.org/iso/fr/foreword.html.

Le présent document a été élaborée par le comité technique ISO/TC 44, Soudage et techniques

connexes, sous comité SC 5, Essais et contrôle des soudures.

Cette deuxième édition annule et remplace la première édition (ISO 5173:2009+Amd 1:2011), qui a fait

l'objet d'une révision technique.
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PROJET DE NORME INTERNATIONALE ISO/DIS 5173
Essais destructifs des soudures sur matériaux métalliques —
Essais de pliage
1 Domaine d'application

Le présent document spécifie une méthode d’essai de pliage transversal envers, endroit et de côté sur

des éprouvettes prélevées dans des soudures bout à bout, des soudures bout à bout avec revêtement

(subdivisées en soudures de tôles revêtues et soudures de revêtement) et revêtement sans soudure

bout à bout, afin d’évaluer la ductilité et/ou l’absence d’imperfections sur la surface ou près de la

surface de l’éprouvette. Elle spécifie également les dimensions de l’éprouvette.

De plus, le présent document spécifie une méthode d’essai de pliage longitudinal envers et endroit à

utiliser au lieu des pliages transversaux pour les assemblages hétérogènes dont les métaux de base

et/ou le métal d’apport ont des différences notables de propriétés physiques et mécaniques concernant

le pliage.

Le présent document est applicable à des assemblages soudés sur matériaux métalliques sous toute

forme de livraison quel que soit le procédé de soudage utilisé.
2 Termes et définitions

Pour les besoins du présent document, les termes et définitions suivants s'appliquent.

2.1
éprouvette de pliage transversal endroit sur soudure bout à bout
TFBB

éprouvette dont la face mise en extension est celle qui contient la plus grande largeur de la soudure ou

celle sur laquelle l’énergie de l’arc de soudage a été appliquée en premier aux éprouvettes transversales

sur soudures bout à bout
Voir Figure 1.
2.2
éprouvette de pliage transversal envers sur soudure bout à bout
TRBB

éprouvette dont la face mise en extension est la face opposée à celle de l’éprouvette de pliage endroit

sur soudure bout à bout, applicable aux éprouvettes transversales sur soudures bout à bout

Voir Figure 2.
2.3
éprouvette de pliage transversal de côté sur soudure bout à bout
SBB

éprouvette dont la face mise en extension est une coupe transversale de la soudure

Voir Figure 3.
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ISO/DIS 5173
2.4
éprouvette de pliage longitudinal endroit sur soudure bout à bout
éprouvette de pliage longitudinal envers sur soudure bout à bout
LFBB
LRBB

éprouvette dont le sens est parallèle à celui de la soudure bout à bout, applicable aux éprouvettes de

pliage endroit et envers
Voir Figure 4.
2.5
éprouvette de pliage endroit sur revêtement sans soudure bout à bout
FBC

éprouvette pour laquelle le revêtement est en extension, applicable à la fois aux éprouvettes

transversales et longitudinales
Voir Figure 5.
2.6
éprouvette de pliage de côté sur revêtement sans soudure bout à bout
SBC

éprouvette pour laquelle la section transversale du revêtement est en extension, applicable à la fois aux

éprouvettes transversales et longitudinales
Voir Figure 6.
2.7
éprouvette de pliage endroit sur revêtement sur soudure bout à bout
éprouvette de pliage de côté sur revêtement sur soudure bout à bout
FBCB
SBCB

éprouvette pour laquelle le revêtement est en extension, ou pour laquelle la section transversale du

revêtement est en extension et comporte une soudure bout à bout
Voir Figures 7 et 8.
3 Principe

Soumission à une déformation plastique d’une éprouvette prélevée transversalement ou

longitudinalement à l’assemblage soudé, par pliage sans inversion du sens de pliage, de manière qu’une

seule des surfaces ou coupes transversales soit mise en extension.

Sauf spécification contraire, l’essai doit être effectué à une température ambiante entre 10 °C et 35 °C.

Les essais dans des conditions contrôlées, lorsqu’ils sont exigés, doivent être réalisés à (23  5) °C.

L’essai doit être effectué conformément à l’une des méthodes spécifiées dans l’Article 6.

4 Symboles et termes abrégés
4.1Symboles
Voir Tableau 1 et Figures 1 à 15.
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ISO/DIS 5173
4.2Termes abrégés
TFBB éprouvette de pliage transversal endroit sur soudure bout à bout
TRBB éprouvette de pliage transversal envers sur soudure bout à bout
SBB éprouvette de pliage transversal de côté sur soudure bout à bout
LFBB éprouvette de pliage longitudinal endroit sur soudure bout à bout
LRBB éprouvette de pliage longitudinal envers sur soudure bout à bout
FBC éprouvette de pliage endroit sur revêtement sans soudure bout à bout
SBC éprouvette de pliage de côté sur revêtement sans soudure bout à bout
FBCB éprouvette de pliage endroit sur revêtement sur soudure bout à bout
SBCB éprouvette de pliage de côté sur revêtement sur soudure bout à bout
Tableau 1 — Symboles et désignations
Symbole Désignation Unité
A allongement minimal en pourcent après cassure requis par la spécification du
matériau
largeur de l’éprouvette mm
largeur hors soudure mm
diamètre du poinçon ou du rouleau intérieur mm
D a
diamètre extérieur du tube
distance entre les rouleaux mm

distance initiale entre le point de contact du rouleau et l’axe de la soudure mm

longueur initiale entre les repères mm
largeur maximale de la soudure après usinage mm
longueur totale de l’éprouvette mm
rayon d’arrondi des arêtes de l’éprouvette mm
rayon des rouleaux mm
épaisseur de la pièce d’essai mm
épaisseur du revêtement mm
épaisseur de l'éprouvette mm
épaisseur du substrat sous le revêtement mm
angle de pliage °

Le terme «tube», seul ou associé, désigne un «tube», une «tuyauterie» ou un «profil creux (sans section rectangulaire)».

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ISO/DIS 5173
4.3Figures correspondant aux termes abrégés

Les Figures 1 à 8 représentent les éprouvettes de pliage sur soudure bout à bout et sur revêtement.

Figure 1 — Éprouvette de pliage transversal endroit sur soudure bout à bout (TFBB)

Figure 2 — Éprouvette de pliage transversal envers sur soudure bout à bout (TRBB)

Figure 3 — Éprouvette de pliage transversal de côté sur soudure bout à bout (SBB)

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ISO/DIS 5173

Figure 4 — Éprouvette de pliage longitudinal sur soudure bout à bout (LFBB et LRBB)

Figure 5 — Éprouvette de pliage endroit sur revêtement sans soudure bout à bout (FBC)

Figure 6 — Éprouvette de pliage de côté sur revêtement sans soudure bout à bout (SBC)

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