EN ISO 6847-2013 en Welding consumables - Deposition of a weld metal pad for chemical analysis《焊接耗材 化学分析用焊接金属块的沉积》.pdf

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1、BSI Standards PublicationBS EN ISO 6847:2013W e l d i n g c o n s u m a b l e s Deposition of a weld metal pad for chemical analysisBS EN ISO 6847:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 6847:2013.It supersedes BS EN ISO 6847:2001 which is withd

2、rawn.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/39, Welding consumables.A list of organizations 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

3、are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 83713 5ICS 25.160.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theS

4、tandards Policy and Strategy Committee on 31 July 2013.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 6847 June 2013 ICS 25.160.20 Supersedes EN ISO 6847:2001English Version Welding consumables - Deposition of a weld metal pad for chemic

5、al analysis (ISO 6847:2013) Produits consommables pour le soudage - Excution dun dpt de mtal fondu pour lanalyse chimique (ISO 6847:2013) Schweizustze - Auftragung von Schweigut zur Bestimmung der chemischen Zusammensetzung (ISO 6847:2013) This European Standard was approved by CEN on 21 April 2013.

6、 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

7、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 into its own language and notified to the CEN-CENELE

8、C 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,

9、 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 Marnix 17,

10、B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 6847:2013: EBS EN ISO 6847:2013EN ISO 6847:2013 (E) 3 Foreword This document (EN ISO 6847:2013) has been prepared by Technical Committee IIW “International In

11、stitute of Welding” in collaboration with Technical Committee CEN/TC 121 “Welding and allied processes” 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 Dec

12、ember 2013, and conflicting national standards shall be withdrawn at the latest by December 2013. 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 pat

13、ent rights. This document supersedes EN ISO 6847:2001. 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, Finl

14、and, Former Yugoslav Republic of Macedonia, 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 I

15、SO 6847:2013 has been approved by CEN as EN ISO 6847:2013 without any modification. BS EN ISO 6847:2013ISO 6847:2013(E) ISO 2013 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Base metal . 13.1 Type 13.2 Dimensions . 13.3 Surface condition 14 Method

16、 for preparing the weld metal pad . 24.1 Drying of the welding consumables . 24.2 Welding position 24.3 Type of current . 24.4 Welding conditions 24.5 Welding method . 25 Weld metal pad size . 36 Sampling 4BS EN ISO 6847:2013ISO 6847:2013(E)ForewordISO (the International Organization for Standardiza

17、tion) 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

18、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

19、 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 Internati

20、onal 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.International Sta

21、ndard ISO 6847 was prepared by the International Institute of Welding, which has been approved as an international standardizing body in the field of welding by the ISO Council.This third edition cancels and replaces the second edition (ISO 6847:2000), of which it constitutes a minor revision.Reques

22、ts for official interpretations of any aspect of this International Standard should be directed to the ISO Central Secretariat, who will forward them to the IIW Secretariat for an official response.iv ISO 2013 All rights reservedBS EN ISO 6847:2013ISO 6847:2013(E)IntroductionISO 6847:1985 addressed

23、only the deposition of a weld metal pad for chemical analysis using covered electrodes for manual arc welding. This pad preparation was expensive to execute. IIW Commission II conducted testing of several methods of weld pad preparation that were less costly to execute than that of ISO 6847:1985 and

24、 yet produced equivalent results. Further, these methods were applicable to solid wires for gas shielded welding, to tubular cored wires for arc welding with or without gas shielding, and to wires and fluxes for submerged arc welding, as well as being applicable to covered electrodes. Accordingly, t

25、his revision simplifies weld pad preparation and broadens the range of welding processes and filler metals. ISO 2013 All rights reserved vBS EN ISO 6847:2013BS EN ISO 6847:2013Welding consumables Deposition of a weld metal pad for chemical analysis1 ScopeThis International Standard specifies the pro

26、cedure to be used for deposition of a weld metal pad for chemical analysis. This International Standard applies to deposition of a weld metal pad by use of covered electrodes, wire electrodes for gas shielded metal arc welding, tubular cored electrodes for gas shielded metal arc welding and for non-

27、gas shielded metal arc welding, tubular cored rods for gas tungsten arc welding, and wire-flux combinations for submerged arc welding. This International Standard is applicable to welding consumables for non-alloy and fine grain steels, high strength steels, creep-resisting steels, stainless and hea

28、t-resisting steels, nickel and nickel alloys, and copper and copper alloys.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated refe

29、rences, the latest edition of the referenced document (including any amendments) applies.ISO 6947, Welds Working positions Definitions of angles of slope and rotationISO 14175, Welding consumables Gases and gas mixtures for fusion welding and allied processes3 Base metal3.1 TypeThe base metal shall

30、have a composition similar to that of the deposited metal or be a weldable carbon manganese structural steel with a carbon content of less than 0,2 %.3.2 DimensionsThe minimum dimensions of the base metal are given in Table 1.3.3 Surface conditionThe surface of the base metal on to which the weld me

31、tal is to be deposited shall be cleaned by grinding or other means in order to remove any rust, scale, grease, or paint.INTERNATIONAL STANDARD ISO 6847:2013(E) ISO 2013 All rights reserved 1BS EN ISO 6847:2013ISO 6847:2013(E)Table 1 Minimum dimensions of the base metalDimensions in millimetresWeldin

32、g consumables Size of welding consumablesPlate sizeaLength ThicknessCovered electrodes and tubular cored rods for gas tungsten arc welding1,6 but 4 4 but 855 6510Wire electrodes for gas shielded arc welding0,6 but 2,5 100 10Tubular cored electrodes for gas shielded or non-gas shielded arc welding0,6

33、 but 4 100 10Wire-flux combinations for sub-merged arc welding1,2 but 4 4 but 6,4200 30015aPlate width should be appropriate for the pass sequence method chosen (see Figure 1).4 Method for preparing the weld metal pad4.1 Drying of the welding consumablesDrying of the welding consumables (covered ele

34、ctrodes, fluxes for submerged arc welding) shall be performed using conditions indicated by the manufacturer. Tubular cored electrodes on metal supports may be dried.4.2 Welding positionThe weld metal pad shall be welded in the flat position (PA position in ISO 6947).4.3 Type of currentThe weld meta

35、l shall be deposited using the type of current (and, if appropriate, the polarity) indicated by the manufacturer. However, if both DC operation and AC operation are claimed, then the test shall be performed using AC.4.4 Welding conditionsThe welding conditions used, such as current, voltage, welding

36、 speed, etc., shall be in accordance with the limits specified in the relevant standard. If the welding conditions are not specified in the relevant standard, each pass shall be welded with a welding current of 70 % to 90 % of the maximum current indicated by the manufacturer. The welding conditions

37、 used to produce the weld metal pad shall be reported.4.5 Welding method4.5.1 GeneralVarious methods for building up a weld metal pad have been shown to be acceptable and the weld metal pad shall be prepared using one of the methods shown in Figure 1. After the welding of each pass, the test piece m

38、ay be cooled in water for about 30 s, then dried sufficiently before proceeding with the 2 ISO 2013 All rights reservedBS EN ISO 6847:2013ISO 6847:2013(E)next pass. The slag shall be removed from each pass. The welding shall be performed by alternating the direction of welding for each layer.Base me

39、tal Method ABase metal Method BBase metal Method CBase metal Method DBase metal Method EBase metal Method FaBase metal Method GaaThe blocks on both sides of the weld deposits of methods F and G are copper.Figure 1 Examples of pass sequence4.5.2 Covered electrodesThe arc length shall be maintained as

40、 short as possible such that the arc remains stable. The maximum weave width shall be 2,5 times the diameter of the electrode core.4.5.3 Solid wires and tubular cored wiresThe number and size of the beads will vary according to the size of the electrodes and the width of the weave as well as the amp

41、erage employed. The electrode extension (stickout) shall be as indicated by the manufacturer 3 mm. The weld metal pad shall be deposited using the type of shielding gas indicated by the manufacturer; otherwise, the type of shielding gas used shall be selected from those specified in ISO 14175. In th

42、e case of submerged arc welding, the appropriate flux shall be used.5 Weld metal pad sizeThe minimum dimensions of the weld metal pad shall be as given in Table 2. ISO 2013 All rights reserved 3BS EN ISO 6847:2013ISO 6847:2013(E)6 SamplingThe surface oxide on the sampling portion of the specimen for

43、 chemical analysis shall be removed by machining or grinding. When taking chips by a milling, a shaping, or a drilling machine, the use of cutting fluid shall be avoided. The specimen for chemical analysis shall be taken from the weld metal of the fifth layer or higher. The specimen shall not includ

44、e the start or the crater.Table 2 Minimum dimensions of the weld metal padWelding consumablesSize of welding consumables mmSampling portionMinimum number of weld layersWidth mmLength mmCovered electrodes and tubular cored rods for gas tungsten arc welding1,6 but 2,6 2,6 but 5 5 but 812 12 1230 40 55

45、5 5 5Wire electrodes for gas shielded arc welding0,6 but 2,5 12 80 5Tubular cored electrodes for gas shielded or non-gas shielded arc welding0,6 but 4 12 80 5Wire-flux combinations for submerged arc welding1,2 but 6,4 12 150 54 ISO 2013 All rights reservedBS EN ISO 6847:2013This page deliberately le

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