1、AWS A5.12M/A5.12:2009An American National Standard(ISO 6848:2004 MOD)SpecificationforTungsten andElectrodes forArcWeldingand CuttingOxide DispersedTungsten550 N.W. LeJeune Road, Miami, FL 33126AWS A5.12M/A5.12:2009 (ISO 6848:2004 MOD)An American National StandardApproved by theAmerican National Stan
2、dards InstituteApril 17, 2009Specification for Tungsten andOxide Dispersed Tungsten Electrodesfor Arc Welding and Cutting7th EditionSupersedes ANSI/AWS A5.12/A5.12M-98Prepared by theAmerican Welding Society (AWS) A5 Committee on Filler Metals and Allied MaterialsUnder the Direction of theAWS Technic
3、al Activities CommitteeApproved by theAWS Board of DirectorsAbstractThis specification prescribes the requirements for the classification of bare tungsten and oxide dispersed tungstenelectrodes for gas tungsten arc welding and cutting and plasma arc welding and cutting. Classification is based upon
4、thechemical composition of the electrode. Standard sizes, finish, lengths, quantities, product identification, color coding,and chemical composition limits are specified.This specification makes use of both U.S. Customary Units and the International System of Units (SI). Since these arenot equivalen
5、t, each system must be used independently of the other.This specification adopts the requirements of ISO 6848:2004 and incorporates the provisions of earlier versions of AWSA5.12, allowing for classifications under both specifications.iiAWS A5.12M/A5.12:2009 (ISO 6848:2004 MOD)International Standard
6、 Book Number: 978-0-87171-747-4American Welding Society550 N.W. LeJeune Road, Miami, FL 33126 2009 by American Welding SocietyAll rights reservedPrinted in the United States of AmericaPhotocopy Rights. No portion of this standard may be reproduced, stored in a retrieval system, or transmitted in any
7、form, including mechanical, photocopying, recording, or otherwise, without the prior written permission of the copyrightowner.Authorization to photocopy items for internal, personal, or educational classroom use only or the internal, personal, oreducational classroom use only of specific clients is
8、granted by the American Welding Society provided that the appropriatefee is paid to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, tel: (978) 750-8400; Internet:.iiiAWS A5.12M/A5.12:2009 (ISO 6848:2004 MOD)Statement on the Use of American Welding Society StandardsAll standard
9、s (codes, specifications, recommended practices, methods, classifications, and guides) of the AmericanWelding Society (AWS) are voluntary consensus standards that have been developed in accordance with the rules of theAmerican National Standards Institute (ANSI). When AWS American National Standards
10、 are either incorporated in, ormade part of, documents that are included in federal or state laws and regulations, or the regulations of other govern-mental bodies, their provisions carry the full legal authority of the statute. In such cases, any changes in those AWSstandards must be approved by th
11、e governmental body having statutory jurisdiction before they can become a part ofthose laws and regulations. In all cases, these standards carry the full legal authority of the contract or other documentthat invokes the AWS standards. Where this contractual relationship exists, changes in or deviat
12、ions from requirementsof an AWS standard must be by agreement between the contracting parties.AWS American National Standards are developed through a consensus standards development process that bringstogether volunteers representing varied viewpoints and interests to achieve consensus. While the AW
13、S administers theprocess and establishes rules to promote fairness in the development of consensus, it does not independently test, evalu-ate, or verify the accuracy of any information or the soundness of any judgments contained in its standards.AWS disclaims liability for any injury to persons or t
14、o property, or other damages of any nature whatsoever, whetherspecial, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, or relianceon this standard. AWS also makes no guarantee or warranty as to the accuracy or completeness of any informationpu
15、blished herein.In issuing and making this standard available, AWS is neither undertaking to render professional or other services for oron behalf of any person or entity, nor is AWS undertaking to perform any duty owed by any person or entity to someoneelse. Anyone using these documents should rely
16、on his or her own independent judgment or, as appropriate, seek theadvice of a competent professional in determining the exercise of reasonable care in any given circumstances. It isassumed that the use of this standard and its provisions are entrusted to appropriately qualified and competent person
17、nel.This standard may be superseded by the issuance of new editions. Users should ensure that they have the latest edition.Publication of this standard does not authorize infringement of any patent or trade name. Users of this standard acceptany and all liabilities for infringement of any patent or
18、trade name items. AWS disclaims liability for the infringement ofany patent or product trade name resulting from the use of this standard.Finally, the AWS does not monitor, police, or enforce compliance with this standard, nor does it have the power to do so.On occasion, text, tables, or figures are
19、 printed incorrectly, constituting errata. Such errata, when discovered, are postedon the AWS web page (www.aws.org).Official interpretations of any of the technical requirements of this standard may only be obtained by sending a request, inwriting, to the appropriate technical committee. Such reque
20、sts should be addressed to the American Welding Society,Attention: Managing Director, Technical Services Division, 550 N.W. LeJeune Road, Miami, FL 33126 (see Annex C).With regard to technical inquiries made concerning AWS standards, oral opinions on AWS standards may be rendered.These opinions are
21、offered solely as a convenience to users of this standard, and they do not constitute professionaladvice. Such opinions represent only the personal opinions of the particular individuals giving them. These individuals donot speak on behalf of AWS, nor do these oral opinions constitute official or un
22、official opinions or interpretations ofAWS. In addition, oral opinions are informal and should not be used as a substitute for an official interpretation.This standard is subject to revision at any time by the AWS A5 Committee on Filler Metals and Allied Materials. It mustbe reviewed every five year
23、s, and if not revised, it must be either reaffirmed or withdrawn. Comments (recommendations,additions, or deletions) and any pertinent data that may be of use in improving this standard are required and should beaddressed to AWS Headquarters. Such comments will receive careful consideration by the A
24、WS A5 Committee on FillerMetals and Allied Materials and the author of the comments will be informed of the Committees response to thecomments. Guests are invited to attend all meetings of the AWS A5 Committee on Filler Metals and Allied Materials toexpress their comments verbally. Procedures for ap
25、peal of an adverse decision concerning all such comments areprovided in the Rules of Operation of the Technical Activities Committee. A copy of these Rules can be obtained fromthe American Welding Society, 550 N.W. LeJeune Road, Miami, FL 33126.This page is intentionally blank.ivAWS A5.12M/A5.12:200
26、9 (ISO 6848:2004 MOD)vAWS A5.12M/A5.12:2009 (ISO 6848:2004 MOD)PersonnelAWS A5 Committee on Filler Metals and Allied MaterialsJ. S. Lee, Chair ChevronH. D. Wehr, 1st Vice Chair Arcos Industries, LLCJ. J. DeLoach, Jr. 2nd Vice Chair Naval Surface Warfare Center R. K. Gupta, Secretary American Welding
27、 SocietyT. Anderson ESAB Welding and Cutting ProductsJ. M. Blackburn Department of the NavyR. S. Brown RSB Alloy Applications, LLCJ. C. Bundy Hobart Brothers CompanyD. D. Crockett The Lincoln Electric CompanyD. A. DelSignore ConsultantJ. DeVito ESAB Welding and Cutting ProductsH. W. Ebert Consultant
28、 D. M. Fedor The Lincoln Electric CompanyJ. G. Feldstein Foster Wheeler North AmericaS. E. Ferree ESAB Welding and Cutting ProductsD. A. Fink The Lincoln Electric CompanyG. L. Franke Naval Surface Warfare CenterR. D. Fuchs Bhler Welding Group USA, Incorporated C. E. Fuerstenau Lucas-Milhaupt, Incorp
29、orated J. A. Henning DeltakR. M. Henson J. W. Harris Company, IncorporatedS. D. Kiser Special MetalsP. J. Konkol Concurrent Technologies Corporation D. J. Kotecki Damian Kotecki Welding ConsultantsL. G. Kvidahl Northrop Grumman Ship Systems A. Y. Lau Canadian Welding BureauA. S. Laurenson Consultant
30、 W. A. Marttila Chrysler LLC T. Melfi The Lincoln Electric CompanyR. Menon Stoody Company M. T. Merlo HyperTech Research, Incorporated D. R. Miller ABS Americas Materials DepartmentB. Mosier Polymet Corporation A. K. Mukherjee Siemens Power Generation, IncorporatedC. L. Null ConsultantM. P. Parekh C
31、onsultantR. L. Peaslee Wall Colmonoy Corporation K.C. Pruden Hydril CompanyS. D. Reynolds, Jr. ConsultantP. K. Salvesen Det Norske Veritas (DNV) K. Sampath ConsultantW. S. Severance ESAB Welding and Cutting ProductsM. J. Sullivan NASSCONational Steel and Shipbuilding R. C. Sutherlin ATI Wah Chang vi
32、AWS A5.12M/A5.12:2009 (ISO 6848:2004 MOD)R. A. Swain Euroweld, LimitedK. P. Thornberry Care Medical, IncorporatedM. D. Tumuluru U.S. Steel CorporationAdvisors to the AWS A5 Committee on Filler Metals and Allied MaterialsR. L. Bateman Electromanufacturas, S. A.R. A. Daemen La Grande TuiliereJ. P. Hun
33、t ConsultantS. Imaoka Kobe Steel LimitedM. A. Quintana The Lincoln Electric Company E. R. Stevens Stevens Welding ConsultingE. S. Surian National University of Lomas de Zamora AWS A5I Subcommittee on Tungsten ElectrodesW. S. Severance, Chair ESAB Welding and Cutting ProductsR. K. Gupta, Secretary Am
34、erican Welding SocietyS. G. Caldwell ATI Firth SterlingM. E. Gedgaudas Arc Machines, Incorporated R. A. Swain Euroweld, LimitedAWS A5 Committee on Filler Metals and Allied Materials (Continued)viiAWS A5.12M/A5.12:2009 (ISO 6848:2004 MOD)ForewordThis foreword is not part of AWS A5.12M/A5.12:2009 (ISO
35、 6848:2004 MOD), Specification for Tungsten andOxide Dispersed Tungsten Electrodes for Arc Welding and Cutting, but is included for informational purposes only.This document is the first AWS adoption of ISO 6848:2004, Arc welding and cutting Nonconsumable tungstenelectrodes Classification. With its
36、insertion of references and additional informative annexes it replaces ANSI/AWSA5.12/A5.12M-98, Specification for Tungsten and Tungsten-Alloy Electrodes for Arc Welding and Cutting. The “MOD”in the designation of this document shows that this is a modified adoption of the ISO document. All changes a
37、re listed inAnnex D. The modifications to ISO 6848:2004 are shown in Italic font.Color code for classification EWCe-2 has been changed from orange to grey. Color code for classification EWG used tobe grey, but now the manufacturer may select any color for this classification not already in use.Pleas
38、e note that ISO uses commas (,) and AWS uses periods (.) for decimals. The ISO decimal commas have been replacedby periods in this document for consistency.Document DevelopmentThe current document is the sixth revision of the initial AWS/ASTM document issued in 1955. The evolution took placeas follo
39、ws:ASTM B297-55T Tentative Specifications for Tungsten Arc-Welding ElectrodesAWS A5.12-55T ASTM B297-65T Tentative Specifications for Tungsten Arc-Welding ElectrodesAWS A5.12-65TANSI/AWS A5.12-69 Specification for Tungsten Arc-Welding ElectrodesW3.12-73ANSI/AWS A5.12-80 Specification for Tungsten Ar
40、c Welding ElectrodesANSI/AWS A5.12-92 Specification for Tungsten and Tungsten Alloy Electrodes for Arc Welding and CuttingANSI/AWS A5.12/A5.12M-98 Specification for Tungsten and Tungsten Alloy Electrodes for Arc Welding and CuttingAttention is drawn to the possibility that some of the elements of th
41、is part of ISO 6848 may be the subject of patentrights. AWS and ISO shall not be held responsible for identifying any or all such patent rights.Comments and suggestions for the improvement of this standard are welcome. They should be sent to the Secretary,AWS A5 Committee on Filler Metals and Allied
42、 Materials, American Welding Society, 550 N.W. LeJeune Road, Miami,FL 33126.This page is intentionally blank.viiiAWS A5.12M/A5.12:2009 (ISO 6848:2004 MOD)ixAWS A5.12M/A5.12:2009 (ISO 6848:2004 MOD)Table of ContentsPage No.Personnel vForeword.viiList of Tables.xList of Figures.x1. Scope.12. Normative
43、 references 13. Classification24. Acceptance .25. Chemical analysis 26. Retest 27. Marking28. Standard sizes and tolerances 88.1 Electrode diameters, lengths, and tolerances.88.2 Finish .98.3 Electrode straightness 98.4 Electrode roundness.59. Rounding-off procedure510. Electrode quality511. Packagi
44、ng .511.1 Marking of packages511.2 Packing 611.3 Marking of overpacking.611.4 Warning label.6Annex A (informative)Conditions of use .7National AnnexesAnnex B (Informative)Guide to AWS Specification for Tungsten and Oxide Dispersed TungstenAnnex B (Informative)Electrodes for Arc Welding and Cutting 1
45、1Annex C (Informative)Guidelines for the Preparation of Technical Inquiries .19Annex D (Informative)List of Deviations from ISO 6848:2004 21AWS Filler Metal Specifications by Material and Welding Process 23AWS Filler Metal Specifications and Related Documents.25xAWS A5.12M/A5.12:2009 (ISO 6848:2004
46、MOD)List of TablesTable Page No.1 Chemical composition requirements for tungsten electrodes .32 Standard diameters and lengths 4A.1 Suitability of current supply type7A.2 Approximate current ranges depending upon the electrode diameter 9List of FiguresFigure Page No.1 Measurement procedure for strai
47、ghtness 5AWS A5.12M/A5.12:2009 (ISO 6848:2004 MOD)1Specification for tungsten and oxide dispersed tungsten electrodes for arc welding and cutting1 ScopeThis standard specifies requirements for classification of nonconsumable tungsten electrodes for inert gasshielded arc welding, and for plasma weldi
48、ng, cutting, and thermal spraying.This specification makes use of both International System of Units (SI) and the U.S. Customary Units. Themeasurements are not exact equivalents; therefore, each system must be used independently of the otherwithout combining in any way when referring to material pro
49、perties. The specification designated A5.12Muses SI Units; and the specification designated A5.12 uses U.S. Customary Units. The later units are shownwithin brackets or in appropriate columns in tables and figures. Standard dimensions based on eithersystem may be used for sizing of tungsten electrodes or packaging or both under A5.12M or A5.12specification.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenc
