EN ISO 17641-2:2015

• Abstract:

  ISO 17641-2:2015 specifies the required specimens, the test piece dimensions, and the procedures to be followed to carry out self-restraint hot cracking tests.; The following tests are described:; - T-joint weld cracking test;; - weld metal tensile test;; - longitudinal bend test.; The tests are designed to provide information about the hot cracking sensitivity of weld metals. The tests are not suitable for the assessment of parent materials.; ISO 17641-2:2015 applies primarily to fully austenitic stainless steels, nickel, nickel base, and nickel copper weld metals. This part of ISO 17641 can also be used for other weld metals.; ISO 17641-2:2015 describes only how to carry out the tests and report the results. It does not give any acceptance criteria.

• Status: Published
• Publication Date: 03-Nov-2015
• Withdrawal Date: 30-May-2016
• 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: 04-Nov-2015
• Completion Date: 04-Nov-2015
• Ref Project: SIST EN ISO 17641-2:2016 - Destructive tests on welds in metallic materials - Hot cracking tests for weldments - Arc welding processes - Part 2: Self-restraint tests (ISO 17641-2:2015)

• Replaces: EN ISO 17641-2:2005 - Destructive tests on welds in metallic materials - Hot cracking tests for weldments - Arc welding processes - Part 2: Self-restraint tests (ISO 17641-2:2005)
• Effective Date: 10-Sep-2014
• Refers: ISO 15792-1:2000 - Welding consumables — Test methods — Part 1: Test methods for all-weld metal test specimens in steel, nickel and nickel alloys
• Effective Date: 25-Aug-2026
• Refers: ISO 15614-1:2004 - Specification and qualification of welding procedures for metallic materials — Welding procedure test — Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys
• Effective Date: 25-Aug-2026
• Refers: ISO 17641-1:2004 - Destructive tests on welds in metallic materials — Hot cracking tests for weldments — Arc welding processes — Part 1: General
• Effective Date: 25-Aug-2026
• Refers: ISO 5178:2001 - Destructive tests on welds in metallic materials — Longitudinal tensile test on weld metal in fusion welded joints
• Effective Date: 25-Aug-2026
• Refers: ISO 6892-1:2009 - Metallic materials — Tensile testing — Part 1: Method of test at room temperature
• Effective Date: 09-Feb-2026
• Refers: ISO 5173:2009 - Destructive tests on welds in metallic materials — Bend tests
• Effective Date: 09-Feb-2026
• Refers: EN 923:2005+A1:2008 - Adhesives - Terms and definitions
• Effective Date: 28-Jan-2026
• Refers: FprEN 1254-2 - Copper and copper alloys - Plumbing fittings - Part 2: Fittings with compression ends for use with copper tubes
• Effective Date: 28-Jan-2026
• Refers: EN ISO 4946:2016 - Steel and cast iron - Determination of copper - 2,2'-Biquinoline spectrophotometric method (ISO 4946:2016)
• Effective Date: 28-Jan-2026
• Refers: EN ISO 8565:2011 - Metals and alloys - Atmospheric corrosion testing - General requirements (ISO 8565:2011)
• Effective Date: 28-Jan-2026
• Referred By: EN 14532-1:2004 - Welding consumables - Test methods and quality requirements - Part 1: Primary methods and conformity assessment of consumables for steel, nickel and nickel alloys
• Effective Date: 28-Jan-2026
• Consolidated By: ISO 17641-2:2015 - Destructive tests on welds in metallic materials — Hot cracking tests for weldments — Arc welding processes — Part 2: Self-restraint tests
• Effective Date: 12-Feb-2026

Overview

EN ISO 17641-2:2015 - issued by CEN - defines standardized self-restraint hot cracking tests for weldments produced by arc welding processes. The document specifies the required specimens, test-piece dimensions, welding and post-weld preparation, test procedures, inspection and reporting formats used to determine the hot-cracking sensitivity of weld metals. It covers test methods only (how to perform and report); it does not prescribe acceptance criteria.

Key topics and technical requirements

• Scope and applicability
  • Applies primarily to fully austenitic stainless steels, nickel, nickel‑base and nickel‑copper weld metals, but can be used for other weld metals.
  • Tests are intended to assess weld-metal sensitivity to hot cracking; they are not suitable for assessment of parent materials.
• Specified tests
  • T-joint weld cracking test - a self‑restraint configuration to generate and detect solidification and liquation cracking in fillet/T‑joint welds.
  • Weld metal tensile test - welds are produced and then tensile loading is applied to open and measure cracks formed during welding; used to quantify microcrack sensitivity (MSI).
  • Longitudinal bend test - bending of machined weld specimens to expose and lengthen existing hot cracks for measurement.
• Test content
  • Details required specimen geometries, test-piece dimensions, surface preparation, welding sequences, and examination methods.
  • Specifies how cracks are detected, measured and reported (including crack length metrics and microcrack sensitivity indicators).
  • Describes test reporting formats (informative annexes provide sample test reports).
• Principle
  • Cracks are generated during welding under self‑restraint; additional straining (tensile or bending) widens existing cracks to facilitate detection and measurement.

Practical applications

• Welding consumables qualification - evaluate filler metals for susceptibility to hot cracking.
• Welding procedure qualification - support development and validation of welding procedures (PQR/WPS) where hot-cracking risk must be understood.
• Production weld coupon testing - screening of processes, consumables or parameters that influence weld solidification and liquation cracking.
• Useful for metallurgy, R&D, QA/QC and failure‑investigation teams concerned with weld quality and reliability in corrosion‑resistant and nickel‑alloy fabrications.

Who should use this standard

• Welding engineers, metallurgists, QA/QC engineers, welding procedure engineers, test laboratories, and manufacturers working with austenitic stainless steels and nickel alloys who need standardized methods to assess hot‑cracking behavior of weld metals.

Related standards

• ISO 17641‑1 (General)
• ISO 17641‑3 (Externally loaded tests, TR)
• ISO 5173, ISO 5178, ISO 6892‑1, ISO 15614‑1, ISO 15792‑1 - referenced normative documents for related test and qualification methods.

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Destructive tests on welds in metallic materials - Hot cracking tests for weldments - Arc
welding processes - Part 2: Self-restraint tests (ISO 17641-2:2015)
Zerstörende Prüfung von Schweißverbindungen an metallischen Werkstoffen -
Heißrissprüfungen für Schweißungen - Lichtbogenschweißprozesse - Teil 2:
Selbstbeanspruchende Prüfungen (ISO 17641-2:2015)
Essais destructifs des soudures sur matériaux métalliques - Essais de fissuration à
chaud des assemblages soudés - Procédés de soudage à l'arc - Partie 2: Essais sur
éprouvettes auto-bridées (ISO 17641-2:2015)
Ta slovenski standard je istoveten z: EN ISO 17641-2:2015
ICS:
25.160.40 Varjeni spoji in vari Welded joints
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 17641-2
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2015
EUROPÄISCHE NORM
ICS 25.160.40 Supersedes EN ISO 17641-2:2005
English Version
Destructive tests on welds in metallic materials - Hot
cracking tests for weldments - Arc welding processes -
Part 2: Self-restraint tests (ISO 17641-2:2015)
Essais destructifs des soudures sur matériaux Zerstörende Prüfung von Schweißverbindungen an
métalliques - Essais de fissuration à chaud des metallischen Werkstoffen - Heißrissprüfungen für
assemblages soudés - Procédés de soudage à l'arc - Schweißungen - Lichtbogenschweißprozesse - Teil 2:
Partie 2: Essais sur éprouvettes auto-bridées (ISO Selbstbeanspruchende Prüfungen (ISO 17641-2:2015)
17641-2:2015)
This European Standard was approved by CEN on 26 September 2015.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17641-2:2015 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
This document (EN ISO 17641-2:2015) 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 May 2016, and conflicting national standards shall be
withdrawn at the latest by May 2016.
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 17641-2:2005.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 17641-2:2015 has been approved by CEN as EN ISO 17641-2:2015 without any
modification.
INTERNATIONAL ISO
STANDARD 17641-2
Second edition
2015-10-15
Destructive tests on welds in metallic
materials — Hot cracking tests for
weldments — Arc welding processes —
Part 2:
Self-restraint tests
Essais destructifs des soudures sur matériaux métalliques — Essais
de fissuration à chaud des assemblages soudés — Procédés de
soudage à l’arc —
Partie 2: Essais sur éprouvettes auto-bridées
Reference number
ISO 17641-2:2015(E)
©
ISO 2015
ISO 17641-2:2015(E)
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
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www.iso.org
ii © ISO 2015 – All rights reserved

ISO 17641-2:2015(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols, designations, and units . 2
5 Principle . 2
6 Description of the tests . 3
6.1 T-joint weld cracking tests . 3
6.1.1 General. 3
6.1.2 Dimension of the test pieces . 3
6.1.3 Preparation of the test pieces . 5
6.1.4 Welding of the test pieces . 5
6.1.5 Examination of the test piece . 6
6.1.6 Test report . 6
6.2 Weld metal tensile test . 6
6.2.1 General. 6
6.2.2 Test specimen . 6
6.2.3 Examination of the test specimen . 7
6.2.4 Test report . 8
6.3 Longitudinal bend test . 8
6.3.1 General. 8
6.3.2 Test weld . 8
6.3.3 Test specimen . 8
6.3.4 Surface preparation .10
6.3.5 Testing .10
6.3.6 Examination of the test specimen .10
6.3.7 Test report .10
Annex A (informative) Test report for T-joint weld cracking test .11
Annex B (informative) Test report for weld metal tensile test .12
Annex C (informative) Test report for longitudinal bend test.13
ISO 17641-2:2015(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 44, Welding and allied processes, Subcommittee
SC 5, Testing and inspection of welds.
This second edition cancels and replaces the first edition (ISO 17641-2:2005), of which it constitutes a
minor amendment.
ISO 17641 consists of the following parts, under the general title Destructive tests on welds in metallic
materials — Hot cracking tests for weldments — Arc welding processes:
— Part 1: General
— Part 2: Self-restraint tests
— Part 3: Externally loaded tests [Technical Report]
iv © ISO 2015 – All rights reserved

INTERNATIONAL STANDARD ISO 17641-2:2015(E)
Destructive tests on welds in metallic materials — Hot
cracking tests for weldments — Arc welding processes —
Part 2:
Self-restraint tests
1 Scope
This part of ISO 17641 specifies the required specimens, the test piece dimensions, and the procedures
to be followed to carry out self-restraint hot cracking tests.
The following tests are described:
— T-joint weld cracking test;
— weld metal tensile test;
— longitudinal bend test.
The tests are designed to provide information about the hot cracking sensitivity of weld metals. The
tests are not suitable for the assessment of parent materials.
This part of ISO 17641 applies primarily to fully austenitic stainless steels, nickel, nickel base, and nickel
copper weld metals. This part of ISO 17641 can also be used for other weld metals.
This part of ISO 17641 describes only how to carry out the tests and report the results. It does not give
any acceptance criteria.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 5173, Destructive tests on welds in metallic materials — Bend tests
ISO 5178, Destructive tests on welds in metallic materials — Longitudinal tensile test on weld metal in
fusion welded joints
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 15614-1, Specification and qualification of welding procedures for metallic materials — Welding
procedure test — Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys
ISO 15792-1, Welding
...