EN ISO 5173:2023

Destructive tests on welds in metallic materials - Bend tests (ISO 5173:2023)

This document 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 reveal imperfections on or near the surface of the test specimen which is under tension during bend testing and/or assess ductility. It also gives the dimensions of the test specimen.
In addition, this document specifies methods to be used instead of transverse bend tests with a former for welded joints when base materials, heat affected zones and/or weld metal have a significant difference in their physical and mechanical properties in relation to bending.
This document applies to metallic materials in all forms of product with welded joints made by any welding process.

Zerstörende Prüfungen von Schweißnähten an metallischen Werkstoffen - Biegeprüfungen (ISO 5173:2023)

Dieses Dokument legt ein Verfahren zur Durchführung von wurzelseitigen, decklagenseitigen Quer- und Seitenbiegeprüfungen an Probestücken aus Stumpfnähten, Stumpfnähten mit Plattierung (unterteilt in Schweißungen in Plattierungsblechen und in Plattierungsschweißnähten) und Plattierung ohne Stumpfnähte fest, um Unregelmäßigkeiten an oder nahe der Oberfläche des Probestücks, das während der Biegeprüfung unter Zug steht, aufzuzeigen und/oder die Verformbarkeit zu beurteilen. Es gibt ebenso die Maße des Probestücks an.
Darüber hinaus legt dieses Dokument Verfahren fest, die anstelle von Querbiegeprüfungen mit einem Biegedorn für Schweißverbindungen anzuwenden sind, wenn Grundwerkstoffe, Wärmeeinflusszonen und/oder Schweißgut einen signifikanten Unterschied in ihren physikalischen und mechanischen Eigenschaften hinsichtlich der Biegung aufweisen.
Dieses Dokument ist anwendbar für Metallwerkstoffe jeglicher Produktform mit Schweißverbindungen, die mit jeder Art von Schweißverfahren erzeugt werden.

Essais destructifs des soudures sur matériaux métalliques - Essais de pliage (ISO 5173:2023)

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 de révéler des défauts sur la surface ou près de la surface de l’éprouvette, mise en extension pendant l’essai de pliage et/ou d’évaluer la ductilité. Elle spécifie également les dimensions de l’éprouvette.
De plus, le présent document spécifie des méthodes à utiliser au lieu des pliages transversaux avec un poinçon pour les assemblages soudés dont les métaux de base, les zones affectées thermiquement et/ou le métal fondu 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.

Porušitveno preskušanje zvarnih spojev na kovinskih materialih - Upogibni preskusi (ISO 5173:2023)

Ta dokument določa metodo za izvedbo vzdolžnega upogibnega preskusa prek kolena, vzdolžnega upogibnega preskusa prek temena in vzdolžnega stranskega upogibnega preskusa na preskusnih vzorcih iz soležnih zvarov, soležnih zvarov z oplatenjem (ki jih delimo na zvare z oplatenimi ploščami in oplatene zvare) in oplatenje brez soležnih zvarov za odkrivanje nepravilnosti na površini ali v bližini površine preskusnega vzorca, ki je pod napetostjo pri preskušanju upogiba, in/ali ocenjevanje duktilnosti. Prav tako podaja mere preskusnega vzorca.
Poleg tega ta dokument določa metode, ki se jih uporablja namesto vzdolžnih upogibnih preskusov, za zvarjene spoje, ko se osnovni materiali, območja, na katera vpliva toplota, in/ali zvarna kovina bistveno razlikujejo glede svojih fizikalnih in mehanskih lastnosti v zvezi z upogibanjem.
Ta dokument se uporablja za kovinske materiale v vseh oblikah izdelkov, ki vsebujejo kakršen koli zvarjeni spoj izveden s katerim koli postopkom varjenja.

General Information

• Status: Published
• Publication Date: 24-Jan-2023
• ICS: 25.160.40 - Welded joints and welds
• Technical Committee: CEN/TC 121 - Welding
• Drafting Committee: CEN/TC 121/WG 21 - Testing of welds
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 25-Jan-2023
• Completion Date: 25-Jan-2023
• Ref Project: SIST EN ISO 5173:2023 - Destructive tests on welds in metallic materials - Bend tests (ISO 5173:2023)

Relations

• Replaces: EN ISO 5173:2010/A1:2011 - Destructive tests on welds in metallic materials - Bend tests - Amendment 1 (ISO 5173:2009/Amd 1:2011)
• Effective Date: 18-Jan-2023
• Replaces: EN ISO 5173:2010 - Destructive tests on welds in metallic materials - Bend tests (ISO 5173:2009)
• Effective Date: 23-Dec-2020

Overview

EN ISO 5173:2023 - Destructive tests on welds in metallic materials: Bend tests defines standardized procedures for performing bend tests on welded metallic assemblies. Published by CEN/ISO, this fourth edition replaces earlier versions and covers transverse (root, face, side) and longitudinal bend tests for butt welds, welded cladding and cladding without butt welds. The standard specifies specimen preparation, test methods, dimensions and reporting to reveal surface or near-surface imperfections and to assess ductility.

Key topics and technical requirements

• Scope and applicability: Applies to metallic materials in any product form and to welded joints made by any welding process (butt welds, clad welds and cladding).
• Types of bend tests: Transverse face (TFBB), transverse root (TRBB), transverse side (TSBB) and longitudinal face/root bend tests, plus cladding-specific face and side tests.
• Specimen preparation: Guidance on location, marking, heat treatment/ageing, extraction, surface preparation and etching prior to testing.
• Specimen dimensions: Standardized dimensions and edge radii for each specimen type are provided to ensure repeatable results.
• Test methods: Includes testing with a former (guided bend), testing with rollers (guided transverse bend) and bend testing with backing plates - with alternatives for heterogeneous assemblies where materials differ in mechanical properties.
• Test conditions and parameters: Specifies selection criteria for former/roller diameters, roller spacing, bending angle and bending elongation; also addresses surface etching and test temperature considerations (testing temperature clause updated).
• Results and reporting: Defines acceptance criteria for revealing imperfections, documenting ductility, and preparing a test report (Annex A gives an example report).

Practical applications

EN ISO 5173:2023 is used to:

• Qualify weld procedures and welders by demonstrating acceptable weld ductility and absence of surface-breaking defects.
• Support quality control in fabrication, pressure-vessel manufacturing, pipeline construction and shipbuilding.
• Provide a repeatable, auditable destructive test for materials selection, supplier qualification and non-conformance investigation.
• Complement non‑destructive examination (NDE) by physically exposing near-surface defects that NDE may miss.

Who should use this standard

• Welding engineers and welding inspectors
• Metallurgical and mechanical test laboratories
• Quality managers in fabrication and heavy industry
• Certification bodies and regulatory authorities
• Designers and R&D teams validating welded joint performance

Related standards

EN ISO 5173:2023 sits within ISO/CEN welding test literature and is commonly used together with standards for visual, radiographic, ultrasonic and tensile testing of welds and materials (refer to national bodies for up-to-date normative references).

Keywords: EN ISO 5173:2023, bend tests, destructive tests on welds, transverse bend test, longitudinal bend test, butt weld, cladding, weld inspection, weld testing standard.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2023
Nadomešča:
SIST EN ISO 5173:2010
SIST EN ISO 5173:2010/A1:2013
Porušitveno preskušanje zvarnih spojev na kovinskih materialih - Upogibni
preskusi (ISO 5173:2023)
Destructive tests on welds in metallic materials - Bend tests (ISO 5173:2023)
Zerstörende Prüfungen von Schweißnähten an metallischen Werkstoffen -
Biegeprüfungen (ISO 5173:2023)
Essais destructifs des soudures sur matériaux métalliques - Essais de pliage (ISO
5173:2023)
Ta slovenski standard je istoveten z: EN ISO 5173:2023
ICS:
25.160.40 Varjeni spoji in vari Welded joints and welds
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 5173
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2023
EUROPÄISCHE NORM
ICS Supersedes EN ISO 5173:2010, EN ISO
5173:2010/A1:2011
English Version
Destructive tests on welds in metallic materials - Bend
tests (ISO 5173:2023)
Essais destructifs des soudures sur matériaux Zerstörende Prüfungen von Schweißnähten an
métalliques - Essais de pliage (ISO 5173:2023) metallischen Werkstoffen - Biegeprüfungen (ISO
5173:2023)
This European Standard was approved by CEN on 29 December 2022.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 5173:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 5173:2023) has been prepared by Technical Committee ISO/TC 44 "Welding
and allied processes" in collaboration with Technical Committee CEN/TC 121 “Welding and allied
processes” 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 July 2023, and conflicting national standards shall be
withdrawn at the latest by July 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 5173:2010.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 5173:2023 has been approved by CEN as EN ISO 5173:2023 without any modification.

INTERNATIONAL ISO
STANDARD 5173
Fourth edition
2023-01
Destructive tests on welds in metallic
materials — Bend tests
Essais destructifs des soudures sur matériaux métalliques — Essais de
pliage
Reference number
ISO 5173:2023(E)
ISO 5173:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 5173:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms.8
5 Principle . 8
6 Preparation of test specimens . 8
6.1 General . 8
6.2 Location . 9
6.3 Marking . 9
6.4 Heat treatment and/or ageing . 9
6.5 Extraction . 9
6.6 Specimen size . . . 9
6.6.1 Transverse root and face bend tests of a butt weld (TRBB and TFBB) . 9
6.6.2 Transverse side bend tests of a butt weld (TSBB) . 9
6.6.3 Longitudinal bend tests of a butt weld (LFBB and LRBB) . 10
6.6.4 Face bend tests of cladding material without a butt weld (FBC) . 10
6.6.5 Side bend tests of cladding material without a butt weld (SBC). 10
6.6.6 Transverse face bend tests of cladding material with a butt weld (FBCB) . 10
6.6.7 Side bend tests of cladding material with a butt weld (SBCB) . 11
6.6.8 Dimensions . 11
6.6.9 Surface preparation .12
7 Conditions of testing .12
7.1 Etching .12
7.2 Testing .13
7.2.1 General .13
7.2.2 Testing with a former .13
7.2.3 Testing with a roller . 17
7.2.4 Bend testing with backing plate . 18
7.3 Diameter of former and roller . 20
7.3.1 Steel, nickel and nickel alloys . 20
7.3.2 Aluminium and its alloys . 20
7.4 Distance between and radius of parallel rollers . 20
7.5 Bending angle . 21
7.6 Bending elongation . 21
8 Test results . .21
9 Test report .21
Annex A (informative) Example of a test report.23
Bibliography .24
iii
ISO 5173:2023(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 44, Welding and allied processes,
Subcommittee SC 5, Testing and inspection of welds, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 121, Welding and allied processes, in accordance
with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This fourth edition cancels and replaces the third edition (ISO 5173:2009) which has been technically
revised. It also incorporates the Amendment ISO 5173:2009/Amd 1:2011.
The main changes are as follows:
— scope has been updated to introduce guided transverse bend tests with a roller and longitudinal
bend tests as alternative methods of testing for heterogeneous assemblies;
— in Clause 4, the testing temperature has been removed;
— Subclause 7.2.2 has been modified accordingly;
— figures have been corrected;
— document has been aligned with the latest ISO/IEC Directives, Part 2.
Any feedback or questions on this document should be directed to the user’s national standards
body. A complete listing of these bodies can be found at www.iso.org/members.html. Official
interpretations of ISO/TC 44 documents, where they exist, are available from this page:
https://committee.iso.org/sites/tc44/home/interpretation.html.
iv
INTERNATIONAL STANDARD ISO 5173:2023(E)
Destructive tests on welds in metallic materials — Bend
tests
1 Scope
This document 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 reveal imperfections on or near the surface of
the test specimen which is under tension during bend testing and/or assess ductility. It also gives the
dimensions of the test specimen.
In addition, this document specifies methods to be used instead of transverse bend tests with a former
for welded joints when base materials, heat affected zones and/or weld metal have a significant
difference in their physical and mechanical properties in relation to bending.
This document applies to metallic materials in all forms of product with welded joints made by any
welding process.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
transverse face bend test specimen for a butt weld
TFBB
transverse butt weld specimen where the face is in tension
Note 1 to entry: See Figure 1.
ISO 5173:2023(E)
Dimensions in millimetres
Key
b width of the test specimen
L total length of the test specimen
t
r radius of the test specimen edges
t thickness of the test piece
t thickness of the test specimen
s
Figure 1 — Transverse face bend test specimen for a butt weld (TFBB)
3.2
transverse root bend test specimen for a butt weld
TRBB
transverse butt weld specimen where the root is in tension
Note 1 to entry: See Figure 2.
ISO 5173:2023(E)
Dimensions in millimetres
Key
b width of the test specimen
L total length of the test specimen
t
r radius of the test specimen edges
t thickness of the test piece
t thickness of the test specimen
s
Figure 2 — Transverse root bend test specimen for a butt weld (TRBB)
3.3
transverse side bend test specimen for a butt weld
TSBB
specimen where the surface in tension is a cross-section of the weld
Note 1 to entry: See Figure 3.
Dimensions in millimetres
Key
b width of the test specimen
L total length of the test specimen
t
r radius of the test specimen edges
t thickness of the test specimen
s
Figure 3 — Transverse side bend test specimen for a butt weld (TSBB)
ISO 5173:2023(E)
3.4
longitudinal face bend test specimen for a butt weld
LFBB
specimen where the direction is parallel to the butt weld direction and where the face is in tension
Note 1 to entry: See Figure 4
Dimensions in millimetres
Key
b width of the test specimen
L maximum width after machining
s
L total length of the test specimen
t
r radius of the test specimen edges
t thickness of the test piece
t thickness of the test specimen
s
b width of outside fusion line
Figure 4 — Longitudinal face/root bend test specimen for a butt weld (LFBB and LRBB)
3.5
longitudinal root bend test specimen for a butt weld
LRBB
specimen where the direction is parallel to the butt weld direction and where the root is in tension
Note 1 to entry: See Figure 4.
3.6
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
Note 1 to entry: See Figure 5.
ISO 5173:2023(E)
Dimensions in millimetres
Key
b width of the test specimen
L total length of the test specimen
t
r radius of the test specimen edges
t thickness of the test piece
t thickness of the test specimen
s
t thickness of the cladding
c
Figure 5 — Face bend test specimen for cladding without a butt weld (FBC)
3.7
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
Note 1 to entry: See Figure 6.
ISO 5173:2023(E)
Dimensions in millimetres
Key
b width of the test specimen
L total length of the test specimen
t
r radius of the test specimen edges
t thickness of the test piece
t thickness of the test specimen
s
t thickness of parent material under cladding
w
t thickness of the cladding
c
Figure 6 — Side bend test specimen for cladding without a butt weld (SBC)
3.8
face bend test specimen for cladding with a butt weld
FBCB
specimen containing a butt weld where the cladding is in tension
Note 1 to entry: See Figure 7.
ISO 5173:2023(E)
Dimensions in millimetres
Key
b width of the test specimen
L total length of the test specimen
t
r radius of the test specimen edges
t thickness of the test piece
t thickness of the test specimen
s
t thickness of the cladding
c
Figure 7 — Face
...