ISO 21952 2025.docx

Z5XISO'*7hzInternationalStandardISO21952Thirdedition2025-02WeldingconsumablesWireelectrodes,wires,rodsanddepositsforgasshieldedarcweldingofcreep-resistingsteels一ClassificationProduitsConsommablespourIesoudageFils-electrodes,fils,baguettesetdepotspourIesoudageaarcsousgazdeprotectiondesaciersresistantaufluageClassificationReferencenumberISO21952:2025(en)COPYRIGHTPROTECTEDDOCUMENT©ISO2025Allrightsreserved.Unlessotherwisespecified,orrequiredinthecontextofitsimplementation,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbeloworISO,smemberbodyinthecountryoftherequester.ISOcopyrightofficeCP401Ch.deBlandonnet8CH-1214Vernier,GenevaPhone:+41227490111Email:copyrightiso.orgWebsite:www.iso.orgPublishedinSwitzerlandContentsPageForewordivIntroductionvi1 Scope12 Normativereferences13 Termsanddefinitions14 Classification24.1 General24.2 Classificationsystems25 Symbolsandrequirements25.1 Symbolfortheproductorprocess25.2 Symbolforthechemicalcompositionofwireelectrodes,wires,androds35.3 Symbolforthemechanicalpropertiesofall-weldmetal35.3.1 Classificationbychemicalcomposition-SystemA35.3.2 Classificationbytensilestrengthandchemicalcomposition-SystemB35.4 Symbolforshieldinggas35.4.1 Classificationbychemicalcomposition-systemA35.4.2 Classificationbytensilestrengthandchemicalcomposition-systemB36 Mechanicaltests127 Preheatingandinterpasstemperatures128 Weldingconditionsandpasssequence129 Chemicalanalysis1310 Roundingprocedure1311 Retest1312 Technicaldeliveryconditions1313 Examplesofdesignation1313.1 General1313.2 Example1-Classificationbychemicalcomposition-systemA1313.3 Example2-Classificationbytensilestrengthandchemicalcomposition-systemB1413.4 Example3-Classificationbychemicalcomposition-systemA1413.5 Example4-Classificationbytensilestrengthandchemicalcomposition-systemB1413.6 Example5-Classificationbychemicalcomposition-systemA1513.7 Example6-Classificationbytensilestrengthandchemicalcomposition-systemB1513.8 Example7-Classificationbychemicalcomposition-systemA1513.9 Example8-Classificationbytensilestrengthandchemicalcomposition-systemB16Bibliography17ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.TheproceduresusedtodevelopthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inparticular,thedifferentapprovalcriterianeededforthedifferenttypesofISOdocumentshouldbenoted.ThisdocumentwasdraftedinaccordancewiththeeditorialrulesoftheISO/IECDirectives,Part2(seeWWW.iso.org/directives).ISOdrawsattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvetheuseof（八）patent(三).ISOtakesnopositionconcerningtheevidence,validityorapplicabilityofanyclaimedpatentrightsinrespectthereof.Asofthedateofpublicationofthisdocument,ISOhadnotreceivednoticeof（八）patent(三)whichmayberequiredtoimplementthisdocument.HoweverlImplementersarecautionedthatthismaynotrepresentthelatestinformation,whichmaybeobtainedfromthepatentdatabaseavailableatWWW.iso.org/patents.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.Foranexplanationofthevoluntarynatureofstandards,themeaningofISOspecifictermsandexpressionsrelatedtoconformityassessment,aswellasinformationaboutISO'sadherencetotheWorldTradeOrganization(WTO)principlesintheTechnicalBarrierstoTrade(TBT工seeWWW.iso.org/iso/foreword.htmLThisdocumentwaspreparedbyTechnicalCommitteeISO/TC44,Weldingandalliedprocesses,SubcommitteeSC3,Weldingconsumables,incollaborationwiththeEuropeanCommitteeforStandardization(CEN)TechnicalCommitteeCEN/TC121,Weldingandalliedprocesses,inaccordancewiththeAgreementontechnicalcooperationbetweenISOandCEN(ViennaAgreement).Thisthirdeditioncancelsandreplacesthesecondedition(ISO21952:2012),whichhasbeentechnicallyrevised.Themainchangesareasfollows: thisdocumenthasbeenreformattedinsinglecolumnshowingSystemAandSystemBintablesandseparateclausesandsubclauses,somewhicharenew; normativereferenceshavebeenupdated; 5.4.2additionaltextwasaddedattheendofthesubclause; TabIe3,newcompositions9C1MV3and9C1MV4wereaddedandfootnotebwasrevised; TabIe3,the