1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Welding consumables Solid wire electrodes, tubular cored electrodes and electrode-flux combinations for submerged arc welding of high strength steels Classification (ISO 26304:2017)BS EN ISO 26304:2018National forewordT
2、his British Standard is the UK implementation of EN ISO 26304:2018. It is identical to ISO 26304:2017. It supersedes BS EN ISO 26304:2011, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee WEE/39, Welding consumables.A list of organizations represented o
3、n this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 96375
4、9ICS 25.160.20Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS E
5、N ISO 26304:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 26304February 2018ICS 25.160.20 Supersedes EN ISO 26304:2011EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CE
6、N Ref. No. EN ISO 26304:2018: EAll rights of exploitation in any form and by any means reserved worldwide for CEN national MembersWelding consumables - Solid wire electrodes, tubular cored electrodes and electrode-flux combinations for submerged arc welding of high strength steels - Classification (
7、ISO 26304:2017)Produits consommables pour le soudage - Fils-lectrodes pleins, fils-lectrodes fourrs et couples lectrodes-flux pour le soudage larc sous flux des aciers haute rsistance - Classification (ISO 26304:2017)Schweizustze - Massivdrahtelektroden, Flldrahtelektroden und Draht-Pulver-Kombinati
8、onen zum Unterpulverschweien von hochfesten Sthlen - Einteilung (ISO 26304:2017)This European Standard was approved by CEN on 9 January 2018.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 nati
9、onal 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 vers
10、ion 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, Cz
11、ech 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United K
12、ingdom.English VersionISO 26304:2017Foreword . iiiIntroduction iv1 Scope .12 Normative references 13 Terms and definitions .24 Classification 24.1 General . 25 Symbols and requirements 35.1 General . 35.2 Symbol for the product or process 35.3 Symbols for the tensile properties of the all-weld metal
13、 deposit . 45.4 Symbol for the impact properties of the all-weld metal 55.5 Symbol for the type of welding flux 55.6 Symbol for the chemical composition of solid wire electrodes and of the all-weld metal from tubular cored electrode-flux combinations 55.7 Symbol for the post-weld heat treatment . 12
14、5.8 Optional symbol for hydrogen content of deposited metal .136 Mechanical tests .146.1 Tensile and impact tests . 146.2 Preheating and interpass temperature . 146.3 Welding conditions and pass sequence 147 Chemical analysis 168 Rounding procedure 169 Retests 1610 Technical delivery conditions 1611
15、 Examples of designation 16Annex A (informative) Possible risk of weld metal hydrogen cracking 20Bibliography .21ii ISO 2017 All rights reservedContents PageBS EN ISO 26304:2018ISO 26304:2017ForewordISO (the International Organization for Standardization) is a worldwide federation of national standa
16、rds 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 organ
17、izations, 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 f
18、urther 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/direc
19、tives).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
20、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 voluntary nature of standards, the meaning of ISO spec
21、ific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee IS
22、O/TC 44, Welding and allied processes, Subcommittee SC 3, Welding consumables.This third edition cancels and replaces the second edition (ISO 26304:2011), which has been technically revised. The main changes compared to the previous edition are as follows: the chemical compositions of a number of so
23、lid wire electrodes and all-weld metal from tubular cored electrode-flux combinations have been changed; H2 and H4 are now options for hydrogen content; an example of a Z designation has been added to Clause 11.Requests for official interpretations of any aspect of this document should be directed t
24、o the Secretariat of ISO/TC 44/SC 3 via your national standards body. A complete listing of these bodies can be found at www.iso.org. ISO 2017 All rights reserved iiiBS EN ISO 26304:2018ISO 26304:2017IntroductionThis document recognizes that there are two somewhat different approaches in the global
25、market to classifying a given solid wire electrode, tubular cored electrode, and electrode-flux combination, and allows for either or both to be used, to suit a particular market need. Application of either type of classification designation (or of both where suitable) identifies a product as classi
26、fied in accordance with this document. The classification in accordance with system A was originally based on EN 14295. The classification in accordance with system B is mainly based on standards used around the Pacific Rim. Future revisions aim to merge the two approaches into a single classificati
27、on system.This document provides a classification for the designation of solid wire electrodes in terms of their chemical composition, tubular cored electrodes in terms of the deposit composition obtained with a particular submerged arc flux, and, where required, electrode-flux combinations in terms
28、 of the yield strength, tensile strength, elongation, and impact properties of the all-weld metal deposit. The ratio of yield to tensile strength of weld metal is generally higher than that of parent material. Users should note that matching weld metal yield strength to parent metal yield strength d
29、oes not necessarily ensure that the weld metal tensile strength matches that of the parent material. Thus, where the application requires matching tensile strength, selection of the consumable should be made by reference to column 3 of Table 1A or Table 1B, as appropriate.Although combinations of el
30、ectrodes and fluxes supplied by individual companies can have the same classification, it is possible that the combination of an electrode with a flux from one manufacturer and the same electrode with the flux from another manufacturer both fluxes having the same classification might not be intercha
31、ngeable unless verified in accordance with this document. Two tubular cored wires of the same classification can likewise produce different results with the same flux.The mechanical properties of the all-weld metal test specimens used to classify the electrode-flux combinations vary from those obtai
32、ned in production joints because of differences in welding procedures such as electrode size, width of weave, welding position, and material composition.iv ISO 2017 All rights reservedBS EN ISO 26304:2018Welding consumables Solid wire electrodes, tubular cored electrodes and electrode-flux combinati
33、ons for submerged arc welding of high strength steels Classification (ISO 26304:2017)1 ScopeThis document specifies requirements for classification of solid wire electrodes, tubular cored electrodes, and electrode-flux combinations (the all-weld metal deposits) in the as-welded condition and in the
34、post-weld heat-treated condition for submerged arc welding of high strength steels with a minimum yield strength greater than 500 MPa or a minimum tensile strength greater than 570 MPa. One flux can be tested and classified with different electrodes. One electrode can be tested and classified with d
35、ifferent fluxes. The solid wire electrode is also classified separately based on its chemical composition.This document is a combined specification providing for classification utilizing a system based on the yield strength and average impact energy of 47 J for the all-weld metal, or utilizing a sys
36、tem based on the tensile strength and average impact energy of 27 J for the all-weld metal.a) Clauses, subclauses and tables which carry the suffix letter “A” are applicable only to solid wire electrodes, tubular cored electrodes and the all-weld metal deposits classified to the system based on the
37、yield strength and the average impact energy of 47 J for the all-weld metal obtained with electrode-flux combinations in accordance with this document.b) Clauses, subclauses and tables which carry the suffix letter “B” are applicable only to solid wire electrodes, tubular cored electrodes and the al
38、l-weld metal deposits classified to the system based on the tensile strength and the average impact energy of 27 J for the all-weld metal obtained with electrode-flux combinations in accordance with this document.c) Clauses, subclauses and tables which do not have either the suffix letter “A” or the
39、 suffix letter “B” are applicable to all solid wire electrodes, tubular cored electrodes and electrode-flux combinations classified in accordance with this document.For comparison purposes, some tables include requirements for electrodes classified in accordance with both systems, placing individual
40、 electrodes from the two systems, which are similar in composition and properties, on adjacent lines in the particular table. In a particular line of the table that is mandatory in one system, the symbol for the similar electrode from the other system is indicated in parentheses. By appropriate rest
41、riction of the formulation of a particular electrode, it is often, but not always, possible to produce an electrode that can be classified in both systems, in which case the electrode, or its packaging, can be marked with the classification in either or both systems.2 Normative referencesThe followi
42、ng documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 544,
43、Welding consumables Technical delivery conditions for filler materials and fluxes Type of product, dimensions, tolerances and markingsISO 3690, Welding and allied processes Determination of hydrogen content in arc weld metalISO 6847, Welding consumables Deposition of a weld metal pad for chemical an
44、alysisINTERNATIONAL STANDARD ISO 26304:2017 ISO 2017 All rights reserved 1BS EN ISO 26304:2018ISO 26304:2017ISO 13916, Welding Guidance on the measurement of preheating temperature, interpass temperature and preheat maintenance temperatureISO 14174, Welding consumables Fluxes for submerged arc weldi
45、ng and electroslag welding ClassificationISO 14344, Welding consumables Procurement of filler materials and fluxesISO 15792-1:2000, Welding consumables Test methods Part 1: Test methods for all-weld metal test specimens in steel, nickel and nickel alloys. Amended by ISO 15792-1:2000/Amd 1:2011ISO 80
46、000-1:2009, Quantities and units Part 1: General. Corrected by ISO 80000-1:2009/ Cor 1:20113 Terms and definitionsNo terms and definitions are listed in this document.ISO and IEC maintain terminological databases for use in standardization at the following addresses: ISO Online browsing platform: av
47、ailable at https:/www.iso.org/obp IEC Electropedia: available at http:/www.electropedia.org/4 Classification4.1 GeneralClassification designations are based on two approaches to indicate the tensile properties and the impact properties of the all-weld metal obtained with a given electrode-flux combi
48、nation. The two designation approaches include additional designators for the chemical composition of a solid wire electrode or the chemical composition of the all-weld metal deposit obtained with a tubular cored electrode and a specific flux. The two designation approaches include additional design
49、ators for some other classification requirements, but not all, as is clear from the following clauses. A given commercial product may be classified to the classification requirements in both systems; then either or both classification designations may be used for the product.The classification includes the all-weld metal properties obtained with a specific electrode-flux combination as given in 4.1A and 4.1B. A solid wire electrode shall be classified in accordance with its chemical composition in Table 3.A tubula
