EN ISO 21952:2012

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Schweißzusätze - Drahtelektroden, Drähte, Stäbe und Schweißgut zum Schutzgasschweißen von warmfesten Stählen - Einteilung (ISO 21952:2012)Produits consommables pour le soudage - Fils-électrodes, fils, baguettes et dépôts pour le soudage à l'arc sous protection gazeuse des aciers résistant au fluage - Classification (ISO 21952:2012)Welding consumables - Wire electrodes, wires, rods and deposits for gas-shielded arc welding of creep-resisting steels - Classification (ISO 21952:2012)25.160.20Potrošni material pri varjenjuWelding consumablesICS:Ta slovenski standard je istoveten z:EN ISO 21952:2012SIST EN ISO 21952:2012en,fr01-september-2012SIST EN ISO 21952:2012SLOVENSKI
STANDARDSIST EN ISO 21952:20081DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE 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 soudage - Fils-électrodes, fils, baguettes et dépôts pour le soudage à l'arc sous gaz de protection des aciers résistant au fluage - Classification (ISO 21952:2012)
Schweißzusätze - Drahtelektroden, Drähte, Stäbe und Schweißgut zum Schutzgasschweißen von warmfesten Stählen - Einteilung (ISO 21952:2012) This European 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 concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
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Reference numberISO 21952:2012(E)© ISO 2012
INTERNATIONAL STANDARD ISO21952Second edition2012-05-01Welding consumables — Wire electrodes, wires, rods and deposits for gas shielded arc welding of creep-resisting steels — Classification Produits consommables pour le soudage — Fils-électrodes, fils, baguettes et dépôts pour le soudage à l'arc sous gaz de protection des aciers résistant au fluage — Classification
ISO 21952:2012(E)
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ISO 2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56  CH-1211 Geneva 20 Tel.
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ii © ISO 2012 – All rights reserved
ISO 21952:2012(E) © ISO 2012 – All rights reserved iii Contents Page Foreword . iv Introduction . v 1 Scope . 1 2 Normative references . 1 3 Classification . 2 4 Symbols and requirements . 2 4.1 Symbol for the product or process . 2 4.2 Symbol for the chemical composition of wire electrodes, wires, and rods . 2 4.3 Symbol for the mechanical properties of all-weld metal . 3 4.4 Symbol for shielding gas . 3 5 Mechanical tests . 10 5.1 Preheating and interpass temperatures . 10 5.2 Welding conditions and pass sequence . 10 6 Chemical analysis . 11 7 Rounding procedure . 11 8 Retest . 11 9 Technical delivery conditions . 11 10 Examples of designation . 12 Bibliography . 14
ISO 21952:2012(E) iv © ISO 2012 – All rights reserved Foreword 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 in 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 Commission (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 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 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, Subcommittee 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 updated 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 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.
ISO 21952:2012(E) © ISO 2012 – All rights reserved v Introduction This International Standard was prepared in collaboration with the 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 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 12070:1999[1]. The classification in accordance with system B is mainly based upon standards used around 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 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 material. Where the application requires matching 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 differences in welding procedure such as electrode size, width of weave, welding position and material composition. SIST EN ISO 21952:2012

INTERNATIONAL STANDARD ISO 21952:2012(E) © ISO 2012 – All rights reserved 1 Welding consumables — Wire electrodes, wires, rods and deposits for gas shielded 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 or 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 requirements 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” are 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 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 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 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 and fluxes — Type of product, 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 consumables — 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 SIST EN ISO 21952:2012

ISO 21952:2012(E) 2 © ISO 2012 – All rights reserved 3 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 designation 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 for 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 Clause 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 identified;
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 shielding 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 requirements 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 electrodes, 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. SIST EN ISO 21952:2012

ISO 21952:2012(E) © ISO 2012 – All rights reserved 3 4.3 Symbol for the mechanical properties of all-weld metal 4.3A 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-gas welding process shall be the following:  49 for 490 MPa minimum tensile strength;  52 for 520 MPa minimum tensile strength;  55 for 550 MPa minimum tensile strength;  57 for 570 MPa minimum tensile strength;  62 for 620 MPa minimum tensile strength;  69 for 690 MPa minimum tensile strength;  78 for 780 MPa minimum tensile strength. The complete mechanical property requirements that shall be fulfilled by the various compositions are specified in Table 2. 4.4 Symbol for shielding gas 4.4A Classification by chemical composition
4.4B Classification by tensile strength and chemical composition No symbol shall be used for the shielding gas.
The symbols for shielding gases shall be in accordance with ISO 14175:2008, for example:  the symbol I1 shall be used when the classification has been performed with shielding gas ISO 14175-I1, 100 % argon;  the symbol M12, for mixed gases, shall be used when the classification has been performed with shielding gas ISO 14175-M12, but without helium;  the symbol M13 shall be used when the classification has been performed with shielding gas ISO 14175-M13;  the symbol M20, for mixed gases, shall be used when the classification has been performed with shielding gas ISO
14175-M20, but without helium.  the symbol M21, for mixed gases, shall be used when the classification has been performed with shielding gas ISO 14175-M21, but without helium;  the symbol C1 shall be used when the classification has been performed with shielding gas ISO 14175-C1, carbon dioxide;  the symbol Z is used for an unspecified shielding gas. SIST EN ISO 21952:2012

ISO 21952:2012(E) Table 1 — Symbols and chemical composition requirements of wire electrodes, wires and rods Symbol for classification in accordance with Chemical composition % (by mass)a,b chemical compositionc ISO 21952-A tensile strength and chemical compositiond ISO 21952-B C Si Mn P S Ni Cr Mo Cu Ti V Other elements MoSi (1M3) 0,08 to 0,15 0,50 to 0,800,70 to 1,300,020 0,020 — — 0,40 to 0,60— — — — (MoSi) 1M3 0,12 0,30 to 0,701,30 0,025 0,025 0,20 – 0,40 to 0,650,35 — — — MnMo
0,08 to 0,15 0,05 to 0,251,30 to 1,700,025 0,025 — — 0,45 to 0,65— — — —
3M3e 0,12 0,60 to 0,901,10 to 1,600,025 0,025 — — 0,40 to 0,650,50 — — —
3M3Te 0,12 0,40 to 1,001,00 to 1,800,025 0,025 — — 0,40 to 0,650,50 0,02 to 0,30— — MoVSi
0,06 to 0,15 0,40 to 0,700,70 to 1,100,020 0,020 — 0,30 to 0,600,50 to 1,00— — 0,20 to 0,40—
CM 0,12 0,10 to 0,400,20 to 1,000,025 0,025 — 0,40 to 0,900,40 to 0,650,40 — — —
CMTe 0,12 0,30 to 0,901,00 to 1,800,025 0,025 — 0,30 to 0,700,40 to 0,650,40 0,02 to 0,30— — CrMo1Si (1CM3) 0,08 to 0,14 0,50 to 0,800,80 to 1,200,020 0,020 — 0,90 to 1,300,40 to 0,65— — — — CrMoV1Si
0,06 to 0,15 0,50 to 0,800,80 to 1,200,020 0,020 — 0,90 to 1,300,90 to 1,30— — 0,10 to 0,35—
1CM 0,07 to 0,12 0,40 to 0,700,40 to 0,700,025 0,025 0,20 1,20 to 1,500,40 to 0,650,35 — — —
1CM1 0,12 0,20 to 0,500,60 to 0,900,025 0,025 — 1,00 to 1,600,30 to 0,650,40 — — —
1CM2 0,05 to 0,15 0,15 to 0,401,60 to 2,000,025 0,025 — 1,00 to 1,600,40 to 0,650,40 — — — (CrMo1Si) 1CM3 0,12 0,30 to 0,900,80 to 1,500,025 0,025 — 1,00 to 1,600,40 to 0,650,40 — — —
1CML 0,05 0,40 to 0,700,40 to 0,700,025 0,025 0,20 1,20 to 1,500,40 to 0,650,35 — — —
1CML1 0,05 0,20 to 0,800,80 to 1,400,025 0,025 — 1,00 to 1,600,40 to 0,650,40 — — —
1CMT 0,05 to 0,15 0,30 to 0,900,80 to 1,500,025 0,025 — 1,00 to 1,600,40 to 0,650,40 0,02 to
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