1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 18275:2012Welding consumables Covered electrodes for manualmetal arc welding of high-strength steels Classification(ISO 18275:2011)BS EN ISO 18275:2012 BRITISH STANDARD
2、National forewordThis British Standard is the UK implementation of EN ISO18275:2012. It is identical to ISO 18275:2011. It supersedes BS EN757:1997 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/39, Welding consumables.A list of organizations repre
3、sented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 7
4、6190 4ICS 25.160.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2012.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPEN
5、NE EUROPISCHE NORM EN ISO 18275 May 2012 ICS 25.160.20 Supersedes EN 757:1997English Version Welding consumables - Covered electrodes for manual metal arc welding of high-strength steels - Classification (ISO 18275:2011) Produits consommables pour le soudage - lectrodes enrobes pour le soudage manue
6、l larc des aciers haute rsistance - Classification (ISO 18275:2011) Schweizustze - Umhllte Stabelektroden zum Lichtbogenhandschweien von hochfesten Sthlen - Einteilung (ISO 18275:2011) This European Standard was approved by CEN on 21 April 2012. CEN members are bound to comply with the CEN/CENELEC I
7、nternal 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
8、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
9、 versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovaki
10、a, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worl
11、dwide for CEN national Members. Ref. No. EN ISO 18275:2012: EBS EN ISO 18275:2012EN ISO 18275:2012 (E) 3 Foreword The text of ISO 18275:2011 has been prepared by Technical Committee ISO/TC 44 “Welding and allied processes” of the International Organization for Standardization (ISO) and has been take
12、n over as EN ISO 18275:2012 by Technical Committee CEN/TC 121 “Welding” 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 November 2012, and conflicting nati
13、onal standards shall be withdrawn at the latest by November 2012. 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 supers
14、edes EN 757:1997. 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, France, Germany, Greece, Hungary
15、, 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 18275:2011 has been approved by CEN as a EN ISO 18275:2012 without any mo
16、dification. BS EN ISO 18275:2012ISO 18275:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Classification .2 4 Symbols and requirements 3 4.1 Symbol for the product/process 3 4.2 Symbol for tensile properties of all-weld metal .3 4.3
17、 Symbol for impact properties of all-weld metal .4 4.4 Symbol for chemical composition of all-weld metal5 4.5 Symbol for type of electrode covering7 4.6 Symbol for condition of post-weld heat treatment of all-weld metal .7 4.7 Symbol for nominal electrode efficiency and type of current 8 4.8 Symbol
18、for welding position 9 4.9 Symbol for diffusible hydrogen content of deposited metal 9 4.10 Mechanical property and composition requirements9 5 Mechanical property tests 15 5.1 General .15 5.2 Preheating and interpass temperatures15 5.3 Pass sequence.15 6 Chemical analysis .15 7 Fillet weld test16 8
19、 Rounding procedure .17 9 Retests17 10 Technical delivery conditions 18 11 Examples of designation 18 Annex A (informative) Classification systems.20 Annex B (informative) Description of types of electrode covering Classification by yield strength and 47 J impact energy.23 Annex C (informative) Desc
20、ription of types of electrode covering Classification by tensile strength and 27 J impact energy.24 Annex D (informative) Notes on diffusible hydrogen26 Annex E (informative) Description of chemical composition symbols Classification by yield strength and 47 J impact energy.27 Annex F (informative)
21、Description of chemical composition symbols Classification by tensile strength and 27 J impact energy .28 Bibliography29 BS EN ISO 18275:2012ISO 18275:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standa
22、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
23、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. International Standards are drafted in accordance with the rules given i
24、n the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 %
25、 of the member bodies casting a vote. ISO 18275 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee SC 3, Welding consumables. This second edition cancels and replaces the first edition (ISO 18275:2005), of which it constitutes a technical revision. It also inco
26、rporates Technical Corrigendum ISO 18275:2005/Cor.1:2007. Requests for official interpretations of any aspect of this International Standard should be directed to 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. BS EN
27、 ISO 18275:2012ISO 18275:2011(E) ISO 2011 All rights reserved vIntroduction This International Standard recognizes that there are two somewhat different approaches in the global market to classifying a given electrode, and allows for either or both to be used, to suit a particular market need. Appli
28、cation of either type of classification designation (or of both, where suitable) identifies a product as classified in accordance with this International Standard. The classification in accordance with system A is mainly based on EN 757:19971. The classification in accordance with system B is mainly
29、 based upon standards used around the Pacific Rim. This International Standard provides a classification system for covered electrodes for high-strength steels in terms of the tensile properties, impact properties and chemical composition of the all-weld metal, as well as the type of electrode cover
30、ing. The ratio of yield strength to tensile strength of weld metal is generally higher than that of parent metal. Users should note that matching weld metal yield strength to parent metal yield strength does not necessarily ensure that the weld metal tensile strength matches that of the parent metal
31、. Therefore, where the application requires matching tensile strength, selection of the consumable should be made by reference to column 3 of Table 1A or column 2 of Table 8B. It should be noted that the mechanical properties of all-weld metal test specimens used to classify covered electrodes can v
32、ary from those obtained in production joints because of differences in welding procedure such as electrode size, width of weave, welding position, and parent metal composition. BS EN ISO 18275:2012BS EN ISO 18275:2012INTERNATIONAL STANDARD ISO 18275:2011(E) ISO 2011 All rights reserved 1Welding cons
33、umables Covered electrodes for manual metal arc welding of high-strength steels Classification 1 Scope This International Standard specifies requirements for classification of covered electrodes and deposited metal in the as-welded condition and in the post-weld heat-treated condition for manual met
34、al arc welding of high-strength steels with a minimum yield strength greater than 500 MPa or a minimum tensile strength greater than 570 MPa. This International Standard is a combined specification providing a classification utilizing a system based upon the yield strength and an average impact ener
35、gy of 47 J of the all-weld metal, or utilizing a system based upon the tensile strength and an average impact energy of 27 J of the all-weld metal. a) Subclauses and tables which carry the suffix letter “A” are applicable only to covered electrodes classified under the system based upon the yield st
36、rength and an average impact energy of 47 J of the all-weld metal given in this International Standard. b) Subclauses and tables which carry the suffix letter “B” are applicable only to covered electrodes classified under the system based upon the tensile strength and an average impact energy of 27
37、J of the all-weld metal given in this International Standard. c) Subclauses and tables which do not have either the suffix letter “A” or the suffix letter “B” are applicable to all covered electrodes classified under this International Standard. 2 Normative references The following referenced docume
38、nts are indispensable for the application 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, Welding consumables Technical delivery conditions for filler materials
39、and fluxes Type of product, dimensions, tolerances and markings ISO 2401, Covered electrodes Determination of the efficiency, metal recovery and deposition coefficient ISO 2560:2009, Welding consumables Covered electrodes for manual metal arc welding of non-alloy and fine grain steels Classification
40、 ISO 3690, Welding and allied processes Determination of hydrogen content in arc weld metal1)ISO 6847, Welding consumables Deposition of a weld metal pad for chemical analysis ISO 6947:2011, Welding and allied processes Welding positions ISO 14344, Welding consumables Procurement of filler materials
41、 and fluxes 1) To be published. (Revision of ISO 3690:2000) BS EN ISO 18275:2012ISO 18275:2011(E) 2 ISO 2011 All rights reservedISO 15792-1:2000+Amd.1:, Welding consumables Test methods Part 1: Test methods for all-weld metal test specimens in steel, nickel and nickel alloys ISO 15792-3, Welding con
42、sumables Test methods Part 3: Classification testing of positional capacity and root penetration of welding consumables in a fillet weld2)ISO 80000-1:2009, Quantities and units Part 1: General 3 Classification Classification designations are based upon two approaches to indicate the tensile properti
43、es and the impact properties of the all-weld metal obtained with a given electrode. The two designation approaches include additional designators for some other classification requirements, but not all, as will be clear from the following subclauses. In most cases, a given commercial product can be
44、classified in both systems. Then either or both classification designations can be used for the product. The classification is based on an electrode diameter of 4,0 mm, with the exception of the symbol for welding position, which is based on ISO 15792-3. 3.1A Classification by yield strength and47 J
45、 impact energy 3.1B Classification by tensile strength and 27 J impact energy The classification is divided into nine parts: 1) the first part gives a symbol indicating theproduct/process to be identified; 2) the second part gives a symbol indicating thestrength and elongation of the all-weld metal(
46、see Table 1A); 3) the third part gives a symbol indicating theimpact properties of the all-weld metal (seeTable 2A); 4) the fourth part gives a symbol indicating thechemical composition of the all-weld metal (seeTable 3A); 5) the fifth part gives a symbol indicating the typeof electrode covering (se
47、e 4.5A); 6) the sixth part gives a symbol indicating post-weld heat treatment if this is applied (see 4.6A);7) the seventh part gives a symbol indicating thenominal electrode efficiency and type of current(see Table 5A); 8) the eighth part gives a symbol indicating thewelding position (see Table 6A)
48、; 9) the ninth part gives a symbol indicating thediffusible hydrogen content of the depositedmetal (see Table 7). The classification is divided into seven parts: 1) the first part gives a symbol indicating the product/process to be identified; 2) the second part gives a symbol indicating the strengt
49、h of the all-weld metal (see Table 1B); 3) the third part gives a symbol indicating the type of electrode covering, the type of current, and the welding position (see Table 4B); 4) the fourth part gives a symbol indicating the chemical composition of the all-weld metal (see Table 3B); 5) the fifth part gives a symbol indicating the condition of the post-weld heat treatment under which the all-weld metal test was conducted (see 4.6B); 6) the sixth part gives a symbol indicating that the electrode has satis
