00483746 PDF BRITISH STANDARD BS EN 440 1995 Welding consumables — Wire electrodes and deposits for gas shielded metal arc welding of non alloy and fine grain steels — Classification The European Stan[.]
BRITISH STANDARD Welding consumables — Wire electrodes and deposits for gas shielded metal arc welding of non alloy and fine grain steels — Classification The European Standard EN 440:1994 has the status of a British Standard UDC 621.791.042:621.791.754:669.141.15 BS EN 440:1995 BS EN 440:1995 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee WEE/39, Welding consumables, upon which the following bodies were represented: Aluminium Federation Associated Offices Technical Committee Association of Welding Distributors British Association for Brazing and Soldering British Compressed Gases Association British Constructional Steelwork Association Ltd British Steel Industry Electricity Association Engineering Equipment and Materials Users’ Association Lloyd’s Register of Shipping Magnesium Industry Council Power Generation Contractors Association [PGCA (BEAMA Ltd.)] Process Plant Association Stainless Steel Wire Industry Association Welding Institute Welding Manufacturers Association (BEAMA Ltd.) Coopted member This British Standard, having been prepared under the direction of the Engineering Sector Board (E/-), was published under the authority of the Standards Board and comes into effect on 15 March 1995 © BSI 12-1998 The following BSI references relate to the work on this standard: Committee reference WEE/39 Draft for comment 91/70925 DC ISBN 580 23786 Amendments issued since publication Amd No Date Comments BS EN 440:1995 National foreword This British Standard has been prepared by Technical Committee WEE/39 and is the English language version of EN 440:1994 Welding consumables — Wire electrodes and deposits for gas shielded metal arc welding of non alloy and fine grain steels — Classification, published by the European Committee for Standardization (CEN) EN 440 was produced as a result of international discussion in which the United Kingdom took an active part This standard supersedes BS 2901-1:1983 which is withdrawn Cross references Publication referred to Corresponding British Standard EN 439:1994 BS EN 439:1994 Welding consumables — Shielding gases for arc welding and cutting ISO 31-0:1992 BS 5775 Specification for quantities, units and symbols Part 0:1993 General principles A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages to 8, an inside back cover and a back cover This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover © BSI 12-1998 i ii blank EUROPEAN STANDARD EN 440 NORME EUROPÉENNE EUROPÄISCHE NORM September 1994 UDC 621.791.042:621.791.754:669.141.15 Descriptors: Welding, arc welding, gas shielded welded, welding electrodes, wire, unalloyed steels, low alloyed steels, manganese steels, classifications, symbols, chemical composition, mechanical properties English version Welding consumables — Wire electrodes and deposits for gas shielded metal arc welding of non alloy and fine grain steels — Classification Produits consommables pour le soudage — Fils électrodes et dépôts pour le soudage l’arc sous gaz des aciers non alliés et des aciers grain fin — Classification Schweißzusätze — Drahtelektroden und Schweißgut zum Metall-Schutzgasschweißen von unlegierten Stählen und Feinkornstählen — Einteilung This European Standard was approved by CEN on 1994-09-09 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 Central Secretariat 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 into its own language and notified to the Central Secretariat has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1994 Copyright reserved to CEN members Ref No EN 440:1994 E EN 440:1994 Foreword Contents This European Standard was prepared by the Technical Committee CEN/TC 121, Welding, the secretariat of which is held by DS The Technical Committee CEN/TC 121 decided to submit the final draft to the formal vote The result was positive Annex A is informative and contains the bibliography 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 March 1995, and conflicting national standards shall be withdrawn at the latest by March 1995 According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom Page Committees responsible Inside front cover Foreword Introduction Scope Normative references 3 Classification Symbols and requirements 4.1 Symbol for the product/process 4.2 Symbol for strength and elongation of all-weld metal 4.3 Symbol for impact properties of all-weld metal 4.4 Symbol for shielding gas 4.5 Symbol for the chemical composition of wire electrodes Mechanical tests 5.1 Preheating and interpass temperatures 5.2 Welding conditions and pass sequence 6 Chemical analysis Technical delivery conditions Example of designation Annex A (informative) Bibliography Table — Symbol for strength and elongation of all-weld metal Table — Symbol for impact properties of all-weld metal Table — Symbol for chemical composition of wire electrodes Table — Welding conditions Table — Pass sequence List of references Inside back cover © BSI 12-1998 EN 440:1994 Introduction Classification This standard proposes a classification in order to designate wire electrodes in terms of their chemistry and, where required, in terms of the yield strength, tensile strength and elongation of the all-weld metal 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 will 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 of Table It should be noted that the mechanical properties of all-weld metal test specimens used to classify the electrodes will 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 A wire electrode shall be classified according to its chemical composition in Table A weld deposit shall be classified with additional symbols according to the mechanical properties of its all-weld metal, using a shielding gas from a specific group The classification of a weld deposit is divided into five parts: 1) the first part gives a symbol indicating the product/process to be identified; 2) the second part gives a symbol indicating strength and elongation of the all-weld metal; 3) the third part gives a symbol indicating impact properties of the all-weld metal; 4) the fourth part gives a symbol indicating the shielding gas used; 5) the fifth part gives a symbol indicating the chemical composition of the wire electrode used Scope This standard specifies requirements for classification of wire electrodes and weld deposits in the as-welded condition for gas shielded metal arc welding of non alloy and fine grain steels with a minimum yield strength of up to 500 N/mm2 One wire electrode may be tested and classified with different gases The classification of a weld deposit is based on tests of the all-weld metal Normative references This European Standard incorporates by dated or undated reference, provisions from other publications These normative references are cited at the appropriate places in the text and the publications are listed hereafter For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision For undated references the latest edition of the publication referred to applies prEN 439, Welding consumables — Shielding gases for arc welding and cutting prEN 759, Welding consumables — Technical delivery conditions for welding filler metals including type of product, dimensions, tolerances and marking prEN 1597-1, Welding consumables — Testing for classification — Part 1: Test assembly for all-weld metal test specimen in steel, nickel and nickel alloys (00121112) ISO 31-0, Quantities and units — Part 0: General principles © BSI 12-1998 Symbols and requirements 4.1 Symbol for the product/process The symbol of a wire electrode for the gas metal arc welding process and/or the resulting weld deposit shall be the letter G placed at the beginning of the designation 4.2 Symbol for strength and elongation of all-weld metal The symbol in Table indicates yield strength, tensile strength and elongation of the all-weld metal in the as-welded condition determined in accordance with clause Table — Symbol for strength and elongation of all-weld metal Symbol Minimum yield strengtha Tensile strength Minimum elongationb % N/mm2 N/mm2 35 355 440 – 570 22 38 380 470 – 600 20 42 420 500 – 640 20 46 460 530 – 680 20 50 500 560 – 720 18 a For yield strength the lower yield (R ) shall be used when eL yielding occurs, otherwise the 0,2 % proof strength (Rpo,2) shall be used b Gauge length is equal to five times the specimen diameter EN 440:1994 4.3 Symbol for impact properties of all-weld metal The symbol in Table indicates the temperature at which an average impact energy of 47 J is achieved under the conditions given in clause Three specimens shall be tested Only one individual value may be lower than 47 J but not lower than 32 J When an all-weld metal has been classified for a certain temperature, it automatically covers any higher temperature in Table Table — Symbol for impact properties of all-weld metal Symbol Temperature for minimum average impact energy of 47 J °C Z No requirements A + 20 0 – 20 – 30 – 40 – 50 – 60 4.4 Symbol for shielding gas The symbols M and C indicate shielding gases as described in EN 439 The symbol M, for mixed gases, shall be used when the classification has been performed with the shielding gas EN 439 – M2, but without helium The symbol C shall be used when the classification has been performed with shielding gas EN 439 – C1, carbon dioxide 4.5 Symbol for the chemical composition of wire electrodes The symbol in Table indicates the chemical composition of the wire electrode and includes an indication of characteristic alloying elements © BSI 12-1998 © BSI 12-1998 Table — Symbol for chemical composition of wire electrodes Chemical composition in % (m/m)abc Symbol C Si Mn P S Ni Mo Al Ti + Zr G0 Any agreed analysis not specified in this standard G2Si 0,06 – 0,14 0,50 – 0,80 0,90 – 1,30 0,025 0,025 0,15 0,15 0,02 0,15 G3Si1 0,06 – 0,14 0,70 – 1,00 1,30 – 1,60 0,025 0,025 0,15 0,15 0,02 0,15 G4Si1 0,06 – 0,14 0,80 – 1,20 1,60 – 1,90 0,025 0,025 0,15 0,15 0,02 0,15 G3Si2 0,06 – 0,14 1,00 – 1,30 1,30 – 1,60 0,025 0,025 0,15 0,15 0,02 0,15 G2Ti 0,04 – 0,14 0,40 – 0,80 0,90 – 1,40 0,025 0,025 0,15 0,15 0,05 – 0,20 0,05 – 0,25 G3Ni1 0,06 – 0,14 0,50 – 0,90 1,00 – 1,60 0,020 0,020 0,80 – 1,50 0,15 0,02 0,15 G2Ni2 0,06 – 0,14 0,40 – 0,80 0,80 – 1,40 0,020 0,020 2,10 – 2,70 0,15 0,02 0,15 G2Mo 0,08 – 0,12 0,30 – 0,70 0,90 – 1,30 0,020 0,020 0,15 0,40 – 0,60 0,02 0,15 G4Mo 0,06 – 0,14 0,50 – 0,80 1,70 – 2,10 0,025 0,025 0,15 0,40 – 0,60 0,02 0,15 G2Al 0,08 – 0,14 0,30 – 0,50 0,90 – 1,30 0,025 0,025 0,15 0,15 0,35 – 0,75 0,15 a If not specified Cr ≤ 0,15, Cu ≤ 0,35 and V ≤ 0,03 Residual copper content in the steel plus any coating shall not exceed 0,35 % (m/m) b Single values shown in the table mean maximum values c The results shall be rounded to the same number of significant figures as in the specified value using the rules according to ISO 310, annex B, Rule A EN 440:1994 EN 440:1994 Mechanical tests Chemical analysis Tensile and impact tests and any required retests shall be carried out in the as-welded condition using an all-weld metal test assembly type according to prEN 1597-1 (00121112) using 1,2 mm diameter wire electrode and welding conditions as described below in 5.1 and 5.2 Chemical analysis shall be performed on specimens of the wire Any analytical technique may be used, but in case of dispute reference shall be made to established published methods 5.1 Preheating and interpass temperatures Preheating is not required; welding may start from room temperature The interpass temperature shall be measured using temperature indicator crayons, surface thermometers or thermocouples The interpass temperature shall not exceed 250 °C If, after any pass, this interpass temperature is exceeded, the test assembly shall be cooled in air to a temperature below that limit 5.2 Welding conditions and pass sequence The welding conditions in Table shall be used with the pass sequence in Table The direction of welding to complete a layer consisting of two passes shall not vary, but the direction of welding of layers shall be alternated Table — Welding conditions NOTE See A.1 and A.2 Technical delivery conditions Technical delivery conditions shall meet the requirements in EN 759 Example of designation A weld deposit produced by gas-shielded metal arc welding having a minimum yield strength of 460 N/mm2 (46) and a minimum average impact energy of 47 J at – 30 °C (3) under mixed gas (see 4.4) using the wire G3Si1 is designated: EN 440 – G 46 M G3Si1 A wire electrode complying with the chemical requirement of G3Si1 in Table is designated: EN 440 – G3Si1 where: EN 440 = Standard number; Diameter Welding current Welding voltage Contact tube distance G = Wire electrode and/or deposit/gas shielded metal arc welding (see 4.1); mm A V mm 46 = Strength and elongation (see Table 1); = Impact properties (see Table 2); M = Shielding gas (see 4.4); G3Si1 = Chemical composition of the wire electrode (see Table 3) 1,2 280 ± 20 20 a a The welding voltage will depend on the choice of shielding gas Table — Pass sequence Electrode diameter Split weave Layer No Passes per layer Number of layers mm 1,2 to top 2a to 10 a The top two layers may be completed with passes per layer © BSI 12-1998 EN 440:1994 Annex A (informative) Bibliography A.1 Handbuch für Eisenhüttenlaboratorium A.2 BS 6200-3, Sampling and analysis of iron, steel and other ferrous metals — Part 3: Methods of analysis © BSI 12-1998 blank BS EN 440:1995 List of references See national foreword © BSI 1998 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI Ð British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on 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