1、BRITISH STANDARD BS EN ISO 17642-3:2005 Destructive tests on welds in metallic materials Cold cracking tests for weldments Arc welding processes Part 3: Externally loaded tests The European Standard EN ISO 17642-3:2005 has the status of a British Standard ICS 25.160.40 BS EN ISO 17642-3:2005 This Br
2、itish Standard was published under the authority of the Standards Pol icy and Strategy Committee on 3 November 2005 BSI 3 November 2005 ISBN 0 580 45784 2 National foreword This British Standard is the official English language version of EN ISO 17642-3:2005. It is identical with ISO 17642-3:2005. T
3、he UK participation in its preparation was entrusted to Technical Committee WEE/2, Welding tests, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep
4、UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publicatio
5、ns referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessar
6、y provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, the EN foreword page, the ISO
7、 title page, pages ii to iv, pages 1 to 12, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO176423 Mar
8、ch2005 ICS25.160.40 Englishversion DestructivetestsonweldsinmetallicmaterialsColdcracking testsforweldmentsArcweldingprocessesPart3:Externally loadedtests(ISO176423:2005) Essaisdestructifsdessouduressurmatriauxmtalliques Essaisdefissurationfroiddesassemblagessouds ProcdsdesoudagelarcPartie3:Essaissu
9、r prouvettesoumiseunechargeextrieure(ISO17642 3:2005) ZerstrendePrfungvonSchweiverbindungenan metallischenWerkstoffenKaltrissprfungenfr SchweiungenLichtbogenschweiprozesseTeil3: FremdbeanspruchtePrfungen(ISO176423:2005) ThisEuropeanStandardwasapprovedbyCENon9February2004. CENmembersareboundtocomplyw
10、iththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStan
11、dardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRe
12、public,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRN
13、ORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2005CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO176423:2005:EForeword This document (EN ISO 17642-3:2005) has been prepared by Technical Committee CEN/TC 121 “Welding”, the secretariat of
14、which is held by DIN, in collaboration with Technical Committee ISO/TC 44 “Welding and allied processes”. 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 September 2005, and conflicting national s
15、tandards shall be withdrawn at the latest by September 2005. EN ISO 17642 consists of the following parts, under the general title Destructive tests on welds in metallic materials - Cold cracking tests for weldments - Arc welding processes: - Part 1: General - Part 2: Self-restraint tests - Part 3:
16、Externally loaded tests According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ir
17、eland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN ISO 17642-3:2005 Reference number ISO 17642-3:2005(E)INTERNATIONAL STANDARD ISO 17642-3 First edition 2005-03-15 Destructive tests on welds
18、 in metallic materials Cold cracking tests for weldments Arc welding processes Part 3: Externally loaded tests Essais destructifs des soudures sur matriaux mtalliques Essais de fissuration froid des assemblages souds Procds de soudage larc Partie 3: Essais sur prouvette soumise une charge extrieure
19、EN ISO 17642-3:2005ii iiiForeword 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 i
20、n 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 Commis
21、sion (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical
22、 committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall
23、 not be held responsible for identifying any or all such patent rights. ISO 17642-3 was prepared by the European Committee for Standardization (CEN) in collaboration with Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee SC 5, Testing and inspection of welds, in accordance wi
24、th the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). Throughout the text of this document, read “.this European Standard.” to mean “.this International Standard.”. ISO 17642 consists of the following parts, under the general title Destructive tests on welds in metallic m
25、aterials Cold cracking tests for weldments Arc welding processes: Part 1: General Part 2: Self-restraint tests Part 3: Externally loaded tests Annex ZA provides a list of corresponding International and European Standards for which equivalents are not given in the text. EN ISO 17642-3:2005iv Content
26、s page 1 Scope 1 2 Normative references 1 3 Terms and definitions .1 4 Designation and symbols .1 5 Principle1 6 Description of the tests.2 6.1 General2 6.2 Implant-test.2 7 Test report 10 Annex A (informative) Test report for implant test 11 Annex ZA (normative) List of corresponding European and I
27、nternational Standards for which equivalents are not given in the text12 EN ISO 17642-3:2005EN ISO 17642-3:2005 11 Scope This European Standard specifies the sizes of the backing plates, specimens and procedures for carrying out externally loaded cold cracking tests by implant-test in order to obtai
28、n information about the cold cracking sensitivity during welding. This standard applies primarily but not exclusively to carbon, manganese and low alloy steels. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, onl
29、y the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1043-1, Destructive tests on welds in metallic materials Hardness testing Part 1: Hardness test on arc welded joints EN ISO 3690, Welding and allied processes - D
30、etermination of hydrogen content in ferritic arc weld metal (ISO 3690:2000) CR ISO 15608, Welding - Guidelines for a metallic material grouping system (ISO/TR 15608:2000) EN ISO 17642-1:2004, Destructive tests on welds in metallic materials - Cold cracking tests for weldments Arc welding processes -
31、 Part 1: General (ISO 17642- 1:2004) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 17642-1:2004 apply. 4 Designation and symbols The following designations and symbols given in Table 1 apply. Table 1 Designation and symbols Symbol Designation Un
32、it Implant-test L Length of the test bead mm d Implant-diameter mm D Diameter of drilled holes mm 5 Principle The externally loaded cold cracking tests serve the purpose of determining the cold cracking sensitivity. According to EN ISO 17642-1:2004, Table 2, one testing procedure is available. By us
33、ing the test procedure the cracks are generated after welding of the test pieces. The specimens provide quantitative - preheat temperature, heat input, diffusible hydrogen content and applied stress - and qualitative information. EN ISO 17642-3:2005 2 6 Description of the tests 6.1 General 6.1.1 The
34、 externally loaded cold cracking test is designed to assess the cold cracking sensitivity of parent materials used for arc welding. This test procedure applies to metal arc welding with covered electrodes and semi-automatic gas shielded metal arc welding using solid and cored wires and submerged-arc
35、 welding. The test provides a qualitative assessment (cracks or no cracks, single test) and determination of minimum preheat temperature, minimum heat input, maximum diffusible hydrogen content or maximum applied stress for freedom of cracks (crack/no crack boundary determination). 6.1.2 Single test
36、 Where a fixed set of welding conditions is being used on a specific material, only one test weld shall be evaluated. 6.1.3 Crack/no crack boundary determinations Where a series of tests is to be used to obtain a crack/no crack boundary criterion the no-crack test apparently defining the boundary sh
37、all be repeated. If this test also gives a no-crack result no further testing shall be required. If cracking is observed in the duplicate test further shall be performed to define the boundary. NOTE 1 Where heat input is the variable it is preferable that the boundary is defined within the range 0,5
38、 kJ/mm and that the duplicate tests are carried out within 0,1 kJ/mm. NOTE 2 Where preheat is the variable it is preferable that the boundary is defined within the range of 12,5 C. 6.2 Implant-test 6.2.1 Test materials The implant specimen and the backing plate shall be from the same group according
39、 to CR ISO 15608. 6.2.2 Dimensions of the test pieces The dimensions of the backing plate of the implant specimen shall be in accordance with Figures 1, 2 and 3, and Table 2. If the welding thermal conditions do not allow to use the recommended dimensions, other dimensions may be used provided that
40、they are mentioned in the test report. 3Dimensions in millimetresKey 1 Temperature measurement 2 Welding direction 3 Implant specimen 4 Test load F NOTE 1 The length of the test bead should be “150 mm min.“. NOTE 2 The minimum distance between the first test bead and the plate edge should be 100 mm.
41、 Figure 1 Implant test EN ISO 17642-3:20054 Dimensions in millimetresNOTE 1 Dimension M is depending on the testing equipment. NOTE 2 Dimension N is depending on the testing equipment. Figure 2 Implant specimen (Helical) Dimensions in millimetres Figure 3 Implant specimen (circular) EN ISO 17642-3:2
42、00556.2.3 Preparation of the test pieces The implant specimen shall be prepared by turning and the backing plate shall be prepared by drilling. Care shall be taken to minimize heating and deformation in the material during machining. The dimension of the backing plates shall be as given in Table 2.
43、Use the general arrangement of the backing plate and specimens as given in Figures 1 and 2 and the tolerances as given in Table 2. The implant specimen shall be adequately covered by the test bead. Normally, a 8 mm diameter implant specimen is used. However, for small weld beads a 6 mm implant may b
44、e used. Table 2 Implant backing plate/test specimens dimensions/conditions and tolerances Backing plate plate thickness 20 mm width length 200 mm 300 mm diameter of hole D D-d = (0,05-0,15) mm material C-Mn steel or similar to steel of implant distance a 33 mm no. of holes 4 (see Figure 1) Implant s
45、pecimen length dependent on equipment diameter d 6 + 0 - 0,05 + 0 8 - 0,05 type of notch helical, circular, V-notch notch angle (40 2) notch depth t (0,5 0,05) mm notch radius R (0,1 0,01) mm pitch (1 0,02) mm The hole and the implant shall be machined in such a way that the implant clearance in the
46、 support plate shall range from 0,05 mm to 0,15 mm (sliding fit). 6.2.4 Welding of the test welds 6.2.4.1 Preheat When the test requires a preheat, both backing plate and the implant specimen shall be preheated by any suitable method. Prior to any welding, check the temperature of the backing plate
47、and implant using a calibrated thermocouple. Where the test demands a specific temperature of preheat, welding should not be commenced until the required temperature is achieved. The temperatures of the backing plate and the implant in the test area shall not differ by more than 5 C. EN ISO 17642-3:
48、20056 6.2.4.2 Deposition Each weld bead shall be deposited in the flat position in one direction and in a single pass. The welding process shall be automated or mechanized. Manual welding which is difficult to control and monitor adequately is not permitted. Fusion penetration shall be such as to locate the notch in the coarse grain heat affected zone of the implant specimen. See Figure 4. C
