1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 21952:2012W e l d i n g c o n s u m a b l e s W i r e electrodes, wires, rods and deposits for gas shielded arc welding of creep-resisting steels Classification (ISO 21
2、952:2012)BS EN ISO 21952:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO21952:2012. It supersedes BS EN ISO 21952:2007 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/39, Welding consumables.A list of o
3、rganizations represented 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 20
4、12ISBN 978 0 580 72583 8ICS 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 STAN
5、DARD NORME EUROPENNE EUROPISCHE NORM EN ISO 21952 May 2012 ICS 25.160.20 Supersedes EN ISO 21952:2007English Version Welding consumables - Wire electrodes, wires, rods and deposits for gas shielded arc welding of creep-resisting steels - Classification (ISO 21952:2012) Produits consommables pour le
6、soudage - Fils-lectrodes, fils, baguettes et dpts pour le soudage larc sous gaz de protection des aciers rsistant au fluage - Classification (ISO 21952:2012) Schweizustze - Drahtelektroden, Drhte, Stbe und Schweigut zum Schutzgasschweien von warmfesten Sthlen - Einteilung (ISO 21952:2012) This Europ
7、ean Standard was approved by CEN on 13 April 2012. 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 conc
8、erning 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 version in any other language made by translation under the responsibility of a CEN member in
9、to 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, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Irel
10、and, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue
11、Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 21952:2012: EBS EN ISO 21952:2012EN ISO 21952:2012 (E) 3 Foreword This document (EN ISO 21952:2012) has been prepared by Technical Committee ISO/TC
12、 44 “Welding and allied processes“ in collaboration with 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
13、2012, and conflicting national 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 ri
14、ghts. This document supersedes EN ISO 21952:2007. 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,
15、France, Germany, Greece, Hungary, 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 21952:2012 has been approved by CEN as a
16、EN ISO 21952:2012 without any modification. BS EN ISO 21952:2012ISO 21952:2012(E) ISO 2012 All rights reserved iiiContents Page Foreword ivIntroduction . v1 Scope 12 Normative references 13 Classification . 24 Symbols and requirements 24.1 Symbol for the product or process . 24.2 Symbol for the chem
17、ical composition of wire electrodes, wires, and rods 24.3 Symbol for the mechanical properties of all-weld metal . 34.4 Symbol for shielding gas 35 Mechanical tests 105.1 Preheating and interpass temperatures 105.2 Welding conditions and pass sequence . 106 Chemical analysis . 117 Rounding procedure
18、 . 118 Retest 119 Technical delivery conditions 1110 Examples of designation 12Bibliography 14BS EN ISO 21952:2012ISO 21952:2012(E) iv ISO 2012 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodi
19、es). 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 organizations, governmental and
20、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 in the ISO/IEC Directives, P
21、art 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 % of the member bodies casti
22、ng 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 not be held responsible for identifying any or all such patent rights. ISO 21952 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Sub
23、committee SC 3, Welding consumables. This second edition cancels and replaces the first edition (ISO 21952:2007) which has been technically revised. The main changes compared to the previous edition are: a) three new symbols have been added in 4.3B; b) the gases designations in 4.4B have been update
24、d in accordance with the latest edition of ISO 14175; c) six new alloys have been added in Tables 1 and 2 on the B side; d) Clause 6 has been revised to make it clearer; e) the examples in Clause 10 have been revised. Requests for official interpretations of any aspect of this International Standard
25、 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 ISO 21952:2012ISO 21952:2012(E) ISO 2012 All rights reserved vIntroduction This International Standard was prepared in collaboration with t
26、he International Institute of Welding. It recognizes that there are two somewhat different approaches in the global market to classifying a given wire electrode, wire, rod or deposit, and allows for either or both to be used, to suit a particular market need. Application of either type of classifica
27、tion 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 12070:19991. The classification in accordance with system B is mainly based upon standards used around
28、the Pacific Rim. This International Standard proposes a classification system for wire electrodes, wires and rods in terms of their chemical composition and, where required, in terms of the yield strength, tensile strength and elongation of the all-weld metal deposit. The ratio of yield to tensile s
29、trength 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 material. Where the application requires matching
30、tensile strength, therefore, selection of the consumable should be made by reference to column 4 of Table 2. It should be noted that the mechanical properties of all-weld metal test pieces used to classify the electrodes, wires and rods vary from those obtained in production joints because of differ
31、ences in welding procedure such as electrode size, width of weave, welding position and material composition. BS EN ISO 21952:2012BS EN ISO 21952:2012INTERNATIONAL STANDARD ISO 21952:2012(E) ISO 2012 All rights reserved 1Welding consumables Wire electrodes, wires, rods and deposits for gas shielded
32、arc welding of creep-resisting steels Classification 1 Scope This International Standard specifies requirements for classification of wire electrodes, wires and rods for gas shielded metal arc welding and tungsten inert-gas welding of creep-resisting steels, and for their deposits in the as-welded o
33、r post-weld heat-treated condition. One wire electrode can be tested and classified with different shielding gases. This International Standard is a combined specification providing for classification utilizing a system based upon the chemical composition of wire electrodes, wires and rods with requ
34、irements for yield strength and average impact energy of 47 J of all-weld metal, or utilizing a system based upon the tensile strength of the all-weld metal deposits and the chemical composition of wire electrodes, wires and rods. a) Clauses, subclauses and tables which carry the suffix letter “A” a
35、re applicable only to wire electrodes, wires, rods and deposits classified in accordance with the system based upon the chemical composition with requirements for yield strength and the average impact energy of 47 J of all-weld metal deposits under this International Standard. b) Clauses, subclauses
36、 and tables which carry the suffix letter “B” are applicable only to wire electrodes, wires, rods and deposits classified in accordance with the system based upon the tensile strength of all-weld metal deposits and the chemical composition of wire electrodes, wires and rods under this International
37、Standard. c) Clauses, subclauses and tables which do not have either the suffix letter “A” or the suffix letter “B” are applicable to all wire electrodes, wires, rods and deposits classified under this International Standard. 2 Normative references The following referenced documents are indispensabl
38、e 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 and fluxes Type of p
39、roduct, dimensions, tolerances and markings ISO 13916, Welding Guidance on the measurement of preheating temperature, interpass temperature and preheat maintenance temperature ISO 14175:2008, Welding consumables Gases and gas mixtures for fusion welding and allied processes ISO 14344, Welding consum
40、ables Procurement of filler materials and fluxes ISO 15792-1, Welding consumables Test methods Part 1: Test methods for all-weld metal test specimens in steel, nickel and nickel alloys ISO 80000-1:2009, Quantities and units Part 1: General BS EN ISO 21952:2012ISO 21952:2012(E) 2 ISO 2012 All rights
41、reserved3 Classification Classification designations are based upon two approaches to indicate the chemical composition of the wire electrode, wire or rod, and tensile properties and impact properties of the all-weld metal deposits obtained with a given wire electrode, wire or rod. The two designati
42、on approaches include additional designators for some other classification requirements, but not all, as is clear from the following subclauses. In most cases, a given commercial product can be classified in accordance with both systems. Then either or both classification designations can be used fo
43、r the product. A wire electrode, wire or rod shall be classified in accordance with its chemical composition as given in Table 1. When the wire electrode, wire, rod or deposit is classified in combination with a shielding gas, the classification shall be prefixed with a symbol in accordance with Cla
44、use 4 as appropriate. 3A Classification by chemical composition 3B Classification by tensile strength and chemical composition The classification is divided into two parts: The classification is divided into four parts: 1) the first part gives a symbol indicating theproduct or process to be identifi
45、ed; 1) the first part gives a symbol indicating the product or process to be identified; 2) the second part gives a symbol indicating the strength and elongation of the all-weld-metal deposit in the post weld heat-treated condition (see Table 2); 3) the third part gives a symbol indicating the shiel
46、ding gas used (see 4.4); 2) the second part gives a symbol indicating thechemical composition of the wire electrode, wire, or rod used (see Table 1). 4) the fourth part gives a symbol indicating the chemical composition of the wire electrode, wire or rod used (see Table 1). 4 Symbols and requirement
47、s 4.1 Symbol for the product or process The symbol for the wire electrode, wire or rod used in the arc welding process shall be the letter G (gas shielded metal arc welding) and/or W (gas shielded arc welding with non-consumable tungsten electrode). 4.2 Symbol for the chemical composition of wire el
48、ectrodes, wires, and rods The symbol in Table 1 indicates the chemical composition of the wire electrode, wire, and rod determined under the conditions given in Clause 6. BS EN ISO 21952:2012ISO 21952:2012(E) ISO 2012 All rights reserved 34.3 Symbol for the mechanical properties of all-weld metal 4.
49、3A Classification by chemical composition 4.3B Classification by tensile strength and chemical composition No symbol shall be used for the mechanicalproperties of the all-weld metal. The all-weld metal deposit obtained with the wire electrodes, wires, androds in Table 1 under conditions given in Clause 5 shall also fulfil the mechanical propertyrequirements specified in Table 2. The symbol for tensile strength for the all-weld metal deposit produced by the gas shielded metal arc welding process and the tungsten inert-ga
