ANSI AWS A5.20-2005 Carbon Steel Electrodes for Flux Cored Arc Welding Specification for《助熔芯电弧焊用碳钢电极规范》.pdf

1、Specificationfor Carbon SteelElectrodes for FluxCored Arc WeldingAWS A5.20/A5.20M:2005An American National StandardCopyright American Welding Society Provided by IHS under license with AWSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Reproduced by Global Engineer

2、ing Documents With the Permission of AWS Under Royalty Agreement 550 N.W. LeJeune Road, Miami, Florida 33126AWS A5.20/A5.20M:2005An American National StandardApproved byAmerican National Standards InstituteJanuary 12, 2005Specification forCarbon Steel Electrodes forFlux Cored Arc WeldingSupersedes A

3、NSI/AWS A5.20-95Prepared byAWS A5 Committee on Filler Metals and Allied MaterialsUnder the Direction ofAWS Technical Activities CommitteeApproved byAWS Board of DirectorsAbstractThis specification prescribes the requirements for classification of carbon steel electrodes for flux cored arc welding.Th

4、e requirements include chemical composition and mechanical properties of the weld metal and certain usability char-acteristics. The AWS A5.20/A5.20M specification also includes optional, supplemental designators for improved tough-ness and diffusible hydrogen and to indicate conformance to special m

5、echanical property requirements when the weldmetal is deposited using both low heat input, fast cooling rate and high heat input, slow cooling rate procedures. Addi-tional requirements are included for standard sizes, marking, manufacturing and packaging. A guide is appended to thespecification as a

6、 source of information concerning the classification system employed and the intended use of carbonsteel flux cored electrodes.This specification makes use of both U.S. Customary Units and the International System of Units (SI). Since these arenot equivalent, each system must be used independently o

7、f the other.Key WordsCarbon steel, flux cored electrodes, flux cored arc welding, arc weldingCopyright American Welding Society Provided by IHS under license with AWSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-iiStatement on Use of AWS American National Standar

8、dsAll standards (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 standards are

9、 either incorporated in, or made part of,documents that are included in federal or state laws and regulations, or the regulations of other governmental bodies,their provisions carry the full legal authority of the statute. In such cases, any changes in those AWS standards must beapproved by the gove

10、rnmental body having statutory jurisdiction before they can become a part of those laws andregulations. In all cases, these standards carry the full legal authority of the contract or other document that invokes theAWS standards. Where this contractual relationship exists, changes in or deviations f

11、rom requirements of an AWSstandard must be by agreement between the contracting parties.International Standard Book Number: 0-87171-003-XAmerican Welding Society, 550 N.W. LeJeune Road, Miami, FL 33126 2005 by American Welding Society. All rights reservedPrinted in the United States of AmericaAWS Am

12、erican National Standards are developed through a consensus standards development process that bringstogether volunteers representing varied viewpoints and interests to achieve consensus. While AWS administers the processand establishes rules to promote fairness in the development of consensus, it d

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15、al or other services for or onbehalf 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 on his or her own independent judgment or, as appropriate, seek the adviceof a competent professional in dete

16、rmining the exercise of reasonable care in any given circumstances.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 a

17、cceptany and all liabilities for infringement of any patent or trade name items. AWS disclaims liability for the infringement ofany patent or product trade name resulting from the use of this standard.Finally, AWS does not monitor, police, or enforce compliance with this standard, nor does it have t

18、he power to do so.On occasion, text, tables, or figures are 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, in

19、 writ-ing, to the Managing Director, Technical Services Division, American Welding Society, 550 N.W. LeJeune Road, Miami, FL33126 (see Annex B). With regard to technical inquiries made concerning AWS standards, oral opinions on AWS standardsmay be rendered. However, such opinions represent only the

20、personal opinions of the particular individuals giving them. Theseindividuals do not speak on behalf of AWS, nor do these oral opinions constitute official or unofficial opinions or interpreta-tions of AWS. In addition, oral opinions are informal and should not be used as a substitute for an officia

21、l 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 years, and if not revised, it must be either reaffirmed or withdrawn. Comments (recommenda-tions, additions, or deletions) and any pertinent

22、data that may be of use in improving this standard are requiredand should be addressed to AWS Headquarters. Such comments will receive careful consideration by the AWS A5Committee on Filler Metals and Allied Materials and the author of the comments will be informed of the Committeesresponse to the c

23、omments. Guests are invited to attend all meetings of the AWS A5 Committee on Filler Metals andAllied Materials to express their comments verbally. Procedures for appeal of an adverse decision concerning all suchcomments are provided in the Rules of Operation of the Technical Activities Committee. A

24、 copy of these Rules can beobtained from the American Welding Society, 550 N.W. LeJeune Road, Miami, FL 33126.Photocopy RightsAuthorization to photocopy items for internal, personal, or educational classroom use only, or the internal, personal, oreducational classroom use only of specific clients, i

25、s granted by the American Welding Society (AWS) provided that theappropriate fee is paid to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, Tel: 978-750-8400;online: http:/.Copyright American Welding Society Provided by IHS under license with AWSNot for ResaleNo reproduction o

26、r networking permitted without license from IHS-,-,-iiiPersonnelAWS A5 Committee on Filler Metals and Allied MaterialsD. A. Fink, Chair The Lincoln Electric CompanyJ. S. Lee, 1st Vice Chair Chicago Bridge therefore, each system must be used inde-pendently of the other, without combining values in an

27、y way. In selecting rational metric units, AWS A1.1, Metric Prac-tice Guide for the Welding Industry, and ISO 554, Welding consumablesTechnical delivery conditions for weldingfiller metalsType of product, dimensions, tolerances and markings, are used where suitable. Tables and figures makeuse of bot

28、h U.S. Customary and SI Units, which, with the application of the specified tolerances, provides for inter-changeability of products in both the U.S. Customary and SI Units.The current document is the third revision of the initial joint ASTM/AWS document issued in 1969. Since it was de-veloped by a

29、subcommittee of the AWS Committee on Filler Metals and Allied Materials, the use of flux cored elec-trodes has been stimulated by developments in electrode manufacturing technology that have permitted the productionof smaller diameter electrodes and by improvements in formulation of the core ingredi

30、ents. This 2005 revision includesthe following significant changes:(1) Heat input limits are now applied to the preparation of mechanical property test assemblies.(2) Maximum tensile strength limits have been added for all multiple pass classifications.(3) Mechanical property tests are required on a

31、dditional electrode sizes.(4) Chemical composition limits have been modified.(5) Welding parameters are specified for diffusible hydrogen testing.(6) Optional supplemental designators (D and Q) have been added to identify high and low cooling rate mechanicalproperty testing for FEMA and Navy applica

32、tions.The evolution took place as follows:Historical BackgroundAWS A5.20-69 Specifications for Mild Steel Electrodes for Flux Cored Arc WeldingANSI W3.20-1973ANSI/AWS A5.20-79 Specification for Carbon Steel Electrodes for Flux Cored Arc WeldingANSI/AWS A5.20-95 Specification for Carbon Steel Electro

33、des for Flux Cored Arc WeldingComments 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 Materials, American Welding Society, 550 N.W. LeJeune Road, Miami,FL 33126.Official interpretations of any of the

34、 technical requirements of this standard may only be obtained by sending a request, inwriting, to the Managing Director, Technical Services Division, American Welding Society. A formal reply will be issued afterit has been reviewed by the appropriate personnel following established procedures (see A

35、nnex B).AWS A5.20/A5.20M:2005Copyright American Welding Society Provided by IHS under license with AWSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-This page is intentionally blank.viAWS A5.20/A5.20M:2005Copyright American Welding Society Provided by IHS under li

36、cense with AWSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-viiTable of ContentsPage No.Personnel iiiForeword vList of Tables viiiList of Figures. viii1. Scope .12. Normative References .13. Classification.24. Acceptance 25. Certification.66. Rounding-Off Procedu

37、re .67. Summary of Tests68. Retest.69. Test Assemblies.710. Chemical Analysis.1311. Radiographic Test .1412. Tension Test 1413. Bend Test.1414. Impact Test1515. Fillet Weld Test.1516. Diffusible Hydrogen Test1517. “D” and “Q” Optional Supplemental Designator Tests 1918. Method of Manufacture.2019. S

38、tandard Sizes .2120. Finish and Uniformity .2121. Standard Package Forms .2122. Winding Requirements2123. Filler Metal Identification .2324. Packaging 2425. Marking of Packages.24Nonmandatory Annexes25Annex AGuide to AWS Specification for Carbon Steel Electrodes for Flux Cored Arc Welding.25Annex BG

39、uidelines for Preparation of Technical Inquiries for AWS Technical Committees 35AWS Filler Metal Specifications by Material and Welding Process37AWS Filler Metal Specifications and Related Documents .39AWS A5.20/A5.20M:2005Copyright American Welding Society Provided by IHS under license with AWSNot

40、for ResaleNo reproduction or networking permitted without license from IHS-,-,-viiiList of TablesTable Page No.1U A5.20 Mechanical Property Requirements 31M A5.20M Mechanical Property Requirements.32 Electrode Usability Requirements .53 Tests Required for Classification.74 Base Metal for Test Assemb

41、lies.125 Heat Input Requirements and Suggested Pass and Layer Sequence for Multiple Pass ElectrodeClassifications 126 Weld Metal Chemical Composition Requirements for Classification to A5.20/A5.20M .137 Dimensional Requirements for Fillet Weld Usability Test Specimens .168 Diffusible Hydrogen Limits

42、 for Weld Metal .179 Procedure Requirements for “D” and “Q” Optional Supplemental Designators.1910 Mechanical Property Requirements for “D” and “Q” Optional Supplemental Designators2111 Standard Sizes and Tolerances of Electrodes 2212 Packaging Requirements22A1 Comparison of Classifications .27List

43、of FiguresFigure Page No.1 A5.20/A5.20M Classification System .42 Pad for Chemical Analysis of Deposited Weld Metal .83 Test Assembly for Mechanical Properties and Soundness of Weld Metal 94 Test Assembly for Transverse Tension and Longitudinal Guided Bend Tests for Welds Madewith Single-Pass Electr

44、odes .105 Fillet Weld Test Assembly.116 Dimensions of Fillet Welds167 Alternate Methods for Facilitating Fillet Weld Fracture .178 Radiographic Standards for Test Assembly in Figure 3 189 Standard SpoolsDimensions of 4, 8, 12, and 14 in 100, 200, 300, and 350 mm Spools.2310 Standard SpoolsDimensions

45、 of 22, 24, and 30 in 560, 610, and 760 mm Spools.24AWS A5.20/A5.20M:2005Copyright American Welding Society Provided by IHS under license with AWSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AWS A5.20/A5.20M:200511. Scope1.1 This specification prescribes require

46、ments for theclassification of carbon steel electrodes for flux cored arcwelding (FCAW) either with or without shielding gas.(Metal cored carbon steel electrodes are classifiedaccording to AWS A5.18/A5.18M.)11.2 Safety and health issues and concerns are beyond thescope of this standard and, therefor

47、e, are not fullyaddressed herein. Some safety and health informationcan be found in the nonmandatory Annex Sections A5and A9. Safety and health information is available fromother sources, including, but not limited to, ANSI Z49.12and applicable federal and state regulations.1.3 This specification ma

48、kes use of both U.S. CustomaryUnits and the International System of Units (SI). Themeasurements are not exact equivalents; therefore, eachsystem must be used independently of the other withoutcombining in any way when referring to weld metalproperties. The specification with the designation A5.20use

49、s U.S. Customary Units. The specification A5.20Muses SI Units. The latter are shown within brackets orin appropriate columns in tables and figures. Standarddimensions based on either system may be used for thesizing of electrodes or packaging or both under theA5.20 and A5.20M specifications.1. AWS standards can be obtained from Global EngineeringDocuments, an Information Handling Services (IHS) GroupCompany,