1、BSI Standards PublicationDestructive tests on welds in metallic materials Hot cracking tests for weldments Arc welding processesPart 2: Self-restraint testsBS EN ISO 17641-2:2015National forewordThis British Standard is the UK implementation of EN ISO 17641-2:2015.It supersedes BS EN ISO 17641-2:200
2、5 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/2, Destructive Testing of Welds.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisi
3、ons ofa contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 87800 8ICS 25.160.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published un
4、der the authority of theStandards Policy and Strategy Committee on 30 November 2015.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 17641-2:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17641-2 November 2015 ICS 25.160.40 Supersedes EN ISO 176
5、41-2:2005English 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 matriaux mtalliques - Essais de fissuration chaud des assemblages souds - Procds
6、de soudage larc - Partie 2: Essais sur prouvettes auto-brides (ISO 17641-2:2015) Zerstrende Prfung von Schweiverbindungen an metallischen Werkstoffen - Heirissprfungen fr Schweiungen - Lichtbogenschweiprozesse - Teil 2: Selbstbeanspruchende Prfungen (ISO 17641-2:2015)This European Standard was appro
7、ved 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 nation
8、al 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 languag
9、e 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, H
10、ungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CE
11、NELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 17641-2:2015 E2 Contents Page European foreword . 3 EN ISO 17641-2:2015 (E) BS EN ISO 17641-2:20153 European forewo
12、rd 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
13、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 r
14、ights. 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
15、 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, Sloveni
16、a, 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. BS EN ISO 17641-2:2015 EN ISO 17641-2:2015 (E) ISO 2015Destructive tests on welds in metallic materials Hot cracking
17、 tests for weldments Arc welding processes Part 2: Self-restraint testsEssais destructifs des soudures sur matriaux mtalliques Essais de fissuration chaud des assemblages souds Procds de soudage larc Partie 2: Essais sur prouvettes auto-bridesINTERNATIONAL STANDARDISO17641-2Second edition2015-10-15R
18、eference numberISO 17641-2:2015(E)BS EN ISO 17641-2:2015ISO 17641-2:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or
19、 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 ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 C
20、P 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS EN ISO 17641-2:2015ISO 17641-2:2015(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Symbols, designations, and units 25 Principle 26 Description of the tests 3
21、6.1 T-joint weld cracking tests 36.1.1 General 36.1.2 Dimension of the test pieces 36.1.3 Preparation of the test pieces . 56.1.4 Welding of the test pieces 56.1.5 Examination of the test piece 66.1.6 Test report . 66.2 Weld metal tensile test . 66.2.1 General 66.2.2 Test specimen . 66.2.3 Examinati
22、on of the test specimen . 76.2.4 Test report . 86.3 Longitudinal bend test . 86.3.1 General 86.3.2 Test weld . 86.3.3 Test specimen . 86.3.4 Surface preparation 106.3.5 Testing 106.3.6 Examination of the test specimen 106.3.7 Test report 10Annex A (informative) Test report for T-joint weld cracking
23、test .11Annex B (informative) Test report for weld metal tensile test .12Annex C (informative) Test report for longitudinal bend test.13 ISO 2015 All rights reserved iiiContents PageBS EN ISO 17641-2:2015ISO 17641-2:2015(E)ForewordISO (the International Organization for Standardization) is a worldwi
24、de 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 tha
25、t 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 docum
26、ent 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 Directive
27、s, 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
28、 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 specifi
29、c terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 44, Welding and allied
30、 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
31、Hot cracking tests for weldments Arc welding processes : Part 1: General Part 2: Self-restraint tests Part 3: Externally loaded tests Technical Reportiv ISO 2015 All rights reservedBS EN ISO 17641-2:2015INTERNATIONAL STANDARD ISO 17641-2:2015(E)Destructive tests on welds in metallic materials Hot cr
32、acking tests for weldments Arc welding processes Part 2: Self-restraint tests1 ScopeThis 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 cra
33、cking 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
34、, 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 referencesThe following documents, in whol
35、e 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
36、metallic materials Bend testsISO 5178, Destructive tests on welds in metallic materials Longitudinal tensile test on weld metal in fusion welded jointsISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperatureISO 15614-1, Specification and qualification of welding proc
37、edures for metallic materials Welding procedure test Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloysISO 15792-1, Welding consumables Test methods Part 1: Test methods for all-weld metal test specimens in steel, nickel and nickel alloysISO 17641-1:2004, Destructive t
38、ests on welds in metallic materials Hot cracking tests for weldments Arc welding processes Part 1: General3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 17641-1:2004 apply. ISO 2015 All rights reserved 1BS EN ISO 17641-2:2015ISO 17641-2:2015(E)4 Symb
39、ols, designations, and unitsFor the purposes of this part of ISO 17641, the symbols and units given in Table 1 apply.Table 1 Symbols, designations, and unitsSymbol Designation UnitT-joint weld cracking testa1Throat thickness of weld bead 1 mma2Throat thickness of weld bead 2 mmt1Thickness of vertica
40、l plate, form C mmt2Thickness of horizontal plate, form C mmWeld metal tensile testd Specimen diameter mmLcTest leng th mmLoMeasuring length on the test specimen mmLeMeasuring length on the test specimen after fractureammLtTot al leng th mmLMFTotal crack length of all detected cracks 0,1 mm mmI1Leng
41、th of an individual crack mmMSI(TT)Microcracks sensitivity indicator (tensile test)bmm/mm2Longitudinal bend test (LBT)R Radius of the test specimen edges 1 mmB Width of the test specimen mmb1Width of outside fusion line mml1Length of an individual crack mmloLength of crack examination area before be
42、nding mmLMFTotal crack length of all detected cracks 0,1 mmLsMaximum width of the weld after machining mmMSI(LBT)Microcrack sensitivity indicator (longitudinal bend test)cmm/mm2aX1+ X2= Le(see Figure 4).bMSI = LMF/(Lo d ).cMSI = LMF/(b lo).5 PrincipleThree test methods are described which are design
43、ed to measure the sensitivity of weld metals to the types of hot cracking described in Clause 3. These test methods are described in Table 2.In all cases, the cracks are generated during the welding of the test pieces. The tensile test and longitudinal bend test are subjected to additional straining
44、 which does not generate any new cracks, but widens the cracks formed during the welding which enables them to be more easily detected and measured.2 ISO 2015 All rights reservedBS EN ISO 17641-2:2015ISO 17641-2:2015(E)Table 2 Self-restraint hot cracking tests and applicationsType of test Types of c
45、racking Results ApplicationsT-joint weld cracking testSolidification QualitativeQualification of welding consumablesQualification test for welding consumablesWeld metal tensile testsSolidificationQualitative or quantitative if microcrack sensitivity index, MSI(TT), is usedWelding procedure qualifica
46、tionProduction weld coupon testQualification of consumablesQualification test for welding consumablesLiquationDuctility dipLongitudinal bend testSolidificationQualitative or quantitative if MSI(LBT)is usedWelding procedure qualificationProduction weld coupon testQualification of welding consumablesQ
47、ualification test for welding consumablesLiquationDuctility dip6 Description of the tests6.1 T-joint weld cracking tests6.1.1 GeneralThe test procedure applies to a single pass restrained fillet weld. It can be used with the manual shielded metal arc, gas metal arc, and tungsten arc welding processe
48、s. It is not suitable for high current processes such as submerged arc.The test method only provides a qualitative assessment (cracks or no cracks) and has a comparatively low sensitivity.6.1.2 Dimension of the test piecesThree types of test (A, B, and C) are specified. Type A is the standard test p
49、iece. Types B and C are more highly restrained and are used to simulate more severe conditions.The dimensions of the test pieces shall be as shown in Figure 1.The test pieces shall be made from the parent material for which the consumable is designed (consumable approval test) or that which is to be used in a fabrication (procedure qualification test).Type B requires the use of a 40 mm thick horizontal plate. If this is not available, then Type C which u
