1、Standard WeldingProcedureSpecification for Naval Applications(SWPS-N) for GasTungsten Arc Weldingof Austenitic StainlessSteel (S-8), 1/8 inch 3 mm through 1-1/2inch 38 mm Thick,MIL-3XX, in the As-Welded Condition,Primarily Plate andStructural NavalApplicationsAWS-NAVSEA B2.1-8-308:2016An American Na
2、tional StandardAWS-NAVSEA B2.1-8-308:2016An American National StandardApproved by theAmerican National Standards InstituteJanuary 26, 2016Standard Welding Procedure Specification for Naval Applications (SWPS-N) for Gas Tungsten Arc Welding of Austenitic Stainless Steel (S-8),1/8 inch 3 mm through 1-
3、1/2 inch 38 mm Thick, MIL-3XX, in the As-Welded Condition,Primarily Plate and Structural Naval Applications1st EditionPrepared by theAmerican Welding Society (AWS) B2 Committee on Procedure and Performance QualificationUnder the Direction of theAWS Technical Activities CommitteeApproved by theAWS Bo
4、ard of DirectorsAbstractThis standard contains the essential welding variables for austenitic stainless steel in the thickness range of 1/8 inch 3 mm through 1-1/2 inch 38 mm, using manual gas tungsten arc welding. It cites the base metals and operating con-ditions necessary to make the weldment, th
5、e filler metal specifications, and joint designs for groove and fillet welds. ThisSWPS-N was developed primarily for naval applications that require performance to NAVSEA Technical PublicationS9074-AQ-GIB-010/248, Requirements for Welding and Brazing Procedure and Performance Qualification.ISBN: 978
6、-0-87171-880-8 2016 by American Welding SocietyAll rights reservedPrinted in the United States of AmericaiiAWS-NAVSEA B2.1-8-308:2016Statement on the Use of American Welding Society StandardsAll standards (codes, specifications, recommended practices, methods, classifications, and guides) of the Ame
7、ricanWelding 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 are either incorporated in, ormade part of, documents that are included in federal or state laws
8、 and regulations, or the regulations of other governmen-tal bodies, their provisions carry the full legal authority of the statute. In such cases, any changes in those AWS standardsmust be approved by the governmental body having statutory jurisdiction before they can become a part of those laws and
9、regulations. 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 from requirements of an AWS stan-dard must be by agreement between the contracting parties.A
10、WS American National Standards are developed through a consensus standards development process that bringstogether volunteers representing varied viewpoints and interests to achieve consensus. While the AWS administers theprocess and establishes rules to promote fairness in the development of consen
11、sus, 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 to property, or other damages of any nature whatsoever, whether spe-cial, indirect, consequentia
12、l, or compensatory, directly or indirectly resulting from the publication, use of, or reliance onthis standard. AWS also makes no guarantee or warranty as to the accuracy or completeness of any information publishedherein.In issuing and making this standard available, AWS is neither undertaking to r
13、ender 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 on his or her own independent judgment or, as appropriate, seek theadvice of a competent prof
14、essional 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 personnel.This standard may be superseded by the issuance of new editions. Users should ensure that
15、 they have the latest edition.Publication of this standard does not authorize infringement of any patent or trade name. Users of this standard accept anyand all liabilities for infringement of any patent or trade name items. AWS disclaims liability for the infringement of anypatent or product trade
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17、 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 writing, to the appropriate technical committee. Such requests should be addressed to the American Welding Society,Attention: Managing Director, Technic
18、al Services Division, 8669 NW 36 St, # 130, Miami, FL 33166 (see Annex A).With regard to technical inquiries made concerning AWS standards, oral opinions on AWS standards may be rendered.These opinions are offered solely as a convenience to users of this standard, and they do not constitute professi
19、onaladvice. Such opinions represent only the personal opinions of the particular individuals giving them. These individualsdo not speak on behalf of AWS, nor do these oral opinions constitute official or unofficial opinions or interpretations ofAWS. In addition, oral opinions are informal and should
20、 not be used as a substitute for an official interpretation.This standard is subject to revision at any time by the AWS B2 Committee on Procedure and Performance Qualification.It must be reviewed every five years, and if not revised, it must be either reaffirmed or withdrawn. Comments (recom-mendati
21、ons, additions, or deletions) that may be of use in improving this standard should be sent to AWS Headquarters.Any pertinent data supporting the comments are required. Such comments will receive careful consideration by the AWSB2 Committee on Procedure and Performance Qualification and the author of
22、 the comments will be informed of theCommittees response to the comments. Guests are invited to attend all meetings of the AWS B2 Committee onProcedure and Performance Qualification to express their comments verbally. Procedures for appeal of an adverse deci-sion concerning all such comments are pro
23、vided in the Rules of Operation of the Technical Activities Committee. A copyof these Rules can be obtained from the American Welding Society, 8669 NW 36 St, # 130, Miami, FL 33166.iiiAWS-NAVSEA B2.1-8-308:2016This page is intentionally blankivAWS-NAVSEA B2.1-8-308:2016PersonnelAWS B2 Committee on P
24、rocedure and Performance QualificationJ. L. Cooley, Chair J. C. therefore, each system must be used independently.Safety. Safety and health issues and concerns are beyond the scope of this standard and therefore are not addressedherein. Safety and health information is available from the following s
25、ources:American Welding Society:(1) ANSI Z49.1, Safety in Welding, Cutting, and Allied Processes(2) AWS Safety and Health Fact Sheets(3) Other safety and health information on the AWS websiteMaterial or Equipment Manufacturers:(1) Safety Data Sheets supplied by materials manufacturers(2) Operating M
26、anuals supplied by equipment manufacturersApplicable Regulatory AgenciesWork performed in accordance with this standard may involve the use of materials that have been deemed hazardous, andmay involve operations or equipment that may cause injury or death. This standard does not purport to address a
27、ll safetyand health risks that may be encountered. The user of this standard should establish an appropriate safety program to address such risks as well as to meet applicable regulatory requirements. ANSI Z49.1 should be considered whendeveloping the safety program.AWS-NAVSEA B2.1-8-308:2016Page 2
28、of 19Permission to reproduce for intra-company use only is granted by the American Welding SocietyStandard Welding Procedure Specification for NavalApplications (SWPS-N)LIMITATIONSThis procedure is not qualified for Notch Toughness or PWHT applications.WELDING PROCESSWelding Process: GTAW (Gas Tungs
29、ten Arc Welding)Method of Application: ManualBASE METALSBase Metal:1Austenitic Stainless Steel, S-8 to S-8 (See Table 1)Thickness Range: 1/8 in 3 mm through 1-1/2 in 38 mm for groove welds,1/8 in 3 mm minimum for fillet weldsCoating: UncoatedFILLER METALSFiller Metal Specification:2MIL-E-19933, Elec
30、trodes and RodsWelding, Bare, Chromium andChromium-Nickel SteelsClassification: See Table 1 for allowable classificationsFiller Metal Grouping: A-8B in NAVSEA S9074-AQ-GIB-010/248 and A Number 8, F Number 6 in AWS B2.1/B2.1MDeposit Thickness Range: 1/8 in 3 mm through 1-1/2 in 38 mm maximum plus rei
31、nforcement forgroove welds,1/8 in 3 mm through 1-1/2 in 38 mm fillet weld size for fillet weldsConsumable Inserts: Not permittedPenetration Enhancing Flux: Not permittedJOINT DESIGNSJoint Design: See Figure 1Backing: When required by Figure 1Backing Material:1Austenitic Stainless Steel, S-8 or weld
32、metal of similar chemical analysis.Nonmetallic or nonfusing metal retainers are not permitted.POSITIONSPermitted Positions: AllVertical Progression: UphillAWS-NAVSEA B2.1-8-308:2016Page 3 of 19Permission to reproduce for intra-company use only is granted by the American Welding Society1S-1 base meta
33、ls are as detailed in NAVSEA S9074-AQ-GIB-010/248 (or approved by the Navy authorizedrepresentative). AWS B2.1/B2.1M includes a list of Navy approved S-8 materials.2Commercial filler metals may be used in place of MIL-E-19933 if purchased to the additional requirements specified inthe fabrication do
34、cument(s).AWS-NAVSEA B2.1-8-308:2016Page 4 of 19Permission to reproduce for intra-company use only is granted by the American Welding SocietyStandard Welding Procedure Specification for NavalApplications (SWPS-N)PREHEAT AND INTERPASS TEMPERATURESPreheat Temperature: 60F 15C MinimumInterpass Temperat
35、ure: 60F 15C Minimum, 350F 175C MaximumPreheat Control: Shelter the weldment from wind and inclement weather during welding anduntil the weld area has cooled to a temperature no more than 50F 28Cabove ambient temperature. When using a gas flame for low-temperaturepreheating, heat the material until
36、it is dry and warm to the touch.Preheat Maintenance: Continuous or special heating not requiredGASTorch Shielding Gas: Argon, or A5.32M/A5.32 (ISO 14175 MOD)-I1-Ar, or MIL-A-18455 ArgonTorch Shielding Gas Flow Rate: 10 ft3/h 4.7 L/min to 25 ft3/h 11.8 L/minRoot Shielding Gas: It is not necessary to
37、shield the root of fillet welds or groove welds with backingor backgouging. When used, Argon, or A5.32M/A5.32 (ISO 14175 MOD)-I1-Ar,or MIL-A-18455 Argon is to be used for root shielding (purge) gas. Gas shallremain in place until the joint is completed or at least 3/16 in 5 mm of weldmetal has been
38、deposited. When introducing root shielding gas to initiate thepurge, it is necessary to have at least 6 volume changes of atmosphere within the purged zone prior to welding. As an alternative, the oxygen content of the purge zone shall be 1% or less, as measured with an OxygenAnalyzer, prior to weld
39、ing.Root ShieldingGas Flow Rate: A typical flow rate of 5 ft3/h 2.4 L/min to 15 ft3/h 7.1 L/min may be useddepending on component configurationTorch Gas Nozzle Size: 1/4 in 6 mm to 3/4 in 19 mm inside diameterTrailing Gas: NoneTUNGSTEN ELECTRODESType: AWS A5.12M/A5.12 (ISO 6848 MOD) EWTh-2, EWCe-2,
40、or EWLa-1.5Size: 1/16 in 1.6 mm through 1/8 in 3.2 mm diameterPOSTWELD HEAT TREATMENTPostweld Heat Treatment: None (Not qualified for PWHT applications).ELECTRICAL CHARACTERISTICSElectrode CurrentBeads or Layers ClassificationaDia. in mm AmperesbPolarityTack, MIL-3XX 1/16 1.6 50100 DCEN (Straight)Ro
41、ot, MIL-3XX 3/32 2.4 70120 DCEN (Straight)Fill MIL-3XX 1/8 3.2 90140 DCEN (Straight)aSee Table 1 for allowable classifications.bValues not to exceed capacity of tungsten electrodes.GROOVE WELDS AND FILLET WELDSPulsing Current: Not permittedTECHNIQUEWeave or Stringer Bead: Either. Width of weave bead
42、s is limited to 1/2 in 13 mm.Peening: Not required. If used, proceed as permitted by the fabrication document(s).Initial Cleaning: Chemical or mechanical; joint shall be dry prior to welding. The joint members tobe welded, including the base metal surfaces, shall be cleaned to remove foreignmaterial
43、 for a minimum of 1 in 25 mm from the weld edge. Mill scale or metallicoxides shall be removed from surfaces on which weld metal will be deposited.Interpass Cleaning: Mechanical only. Weld metal and adjacent surfaces shall be cleaned prior todepositing subsequent passes or layers and upon completion
44、 of the weld.Backgouging: Mechanical or thermal when used. Before applying weld metal on the reverseside of double-welded joints, the joint shall be (1) prepared for welding bychipping, grinding, machining, or arc gouging to remove all unsound metaland (2) contoured for access and cleaned, and inspe
45、cted per NAVSEATechnical Publication T9074-AS-GIB-010/271, Requirements forNondestructive Testing Methods, to assure a sound weld.Single or Multiple Passes: Either. A minimum of two weld layers are required for (a) all pressure containing weld joints and (b) each side of tank boundary fillet weld jo
46、ints.Maximum Bead Thickness: 1/4 in 6 mmRepair: Defects in welds shall be removed by mechanical or arc gouging methodsand the excavation inspected per the fabrication document. The repair cavitymay differ in contour and dimension from a normal joint preparation and maypresent different restraint con
47、ditions. Repair of base metal defects shall be inaccordance with the requirements of the fabrication document(s).AWS-NAVSEA B2.1-8-308:2016Page 5 of 19Permission to reproduce for intra-company use only is granted by the American Welding SocietyStandard Welding Procedure Specification for NavalApplic
48、ations (SWPS-N)Table 1Base Metal and Corresponding Filler Metal ClassificationsBase Metal Grade or Type Corresponding MIL-Type or Classification304, CF8 MIL-308, MIL-308L, MIL-309, ER309L304L, CF3 MIL-308L, ER309L316, CF8M MIL-316, MIL-316L316L, CF3M MIL-316L321 MIL-321347, CF8C MIL-347348 MIL-347No
49、tes:1The specific filler metal classification from the table above or any other filler metal classification conforming to MIL-3XXmay be used when specified by the fabrication document(s).2 When two different base metal grades or types listed above are being joined, a filler metal classification permitted foreither base metal grade or type, or as specified by the fabrication document(s), may be used.3 ER309L classification to AWS A5.9/5.9M, Specification for Bare Stainless Steel Welding Electrodes and Rods. See foot
