1、Designation: A403/A403M 18aStandard Specification forWrought Austenitic Stainless Steel Piping Fittings1This standard is issued under the fixed designation A403/A403M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of las
2、t revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope*1.1 This specification covers wrought
3、stainless steel fittingsfor pressure piping applications.21.2 Several grades of austenitic stainless steel alloys areincluded in this specification Grades are designated with aprefix, WP or CR, based on the applicable ASME or MSSdimensional and rating standards, respectively.1.3 For each of the WP s
4、tainless grades, several classes offittings are covered, to indicate whether seamless or weldedconstruction was utilized. Class designations are also utilizedto indicate the nondestructive test method and extent ofnondestructive examination (NDE). Table 1 is a generalsummary of the fitting classes a
5、pplicable to all WP grades ofstainless steel covered by this specification. There are noclasses for the CR grades. Specific requirements are coveredelsewhere.1.4 This specification is expressed in both inch-pound unitsand in SI units. However, unless the order specifies theapplicable “M” specificati
6、on designation (SI units), the mate-rial shall be furnished to inch-pound units.1.5 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem may not be exact equivalents; the
7、refore, each systemshall be used independently of the other. Combining valuesfrom the two systems may result in non-conformance with thestandard.1.6 This specification does not apply to cast steel fittings.Austenitic stainless steel castings are covered in SpecificationsA351/A351M, A743/A743M, and A
8、744/A744M.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalB
9、arriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3A351/A351M Specification for Castings, Austenitic, forPressure-Containing PartsA743/A743M Specification for Castings, Iron-Chromium,Iron-Chromium-Nickel, Corrosion Resistant, for GeneralApplicationA744/A744M Specification fo
10、r Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe ServiceA751 Test Methods, Practices, and Terminology for Chemi-cal Analysis of Steel ProductsA960/A960M Specification for Common Requirements forWrought Steel Piping FittingsE112 Test Methods for Determining Average Grain SizeE165/E16
11、5M Practice for Liquid Penetrant Examination forGeneral Industry2.2 ASME Standards:4ASME B16.9 Factory-Made Wrought Steel Butt-WeldingFittingsASME B16.11 Forged Steel Fittings, Socket-Welding andThreaded2.3 MSS Standards:5MSS SP-25 Standard Marking System for Valves, Fittings,Flanges, and UnionsMSS
12、SP-43 Standard Practice for Light Weight StainlessSteel Butt-Welding FittingsMSS SP-79 Socket-Welding Reducer Inserts1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.22 on Steel Forging
13、s and Wrought Fittings for PipingApplications and BoltingMaterials for Piping and Special Purpose Applications.Current edition approved Sept. 1, 2018. Published September 2018. Originallyapproved in 1956. Last previous edition approved in 2018 as A403/A403M 18.DOI: 10.1520/A0403_A0403M-18A.2For ASME
14、 Boiler and Pressure Vessel Code applications see related Specifi-cation SA-403 in Section II of that Code.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the stand
15、ards Document Summary page onthe ASTM website.4Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Two Park Ave., New York, NY 10016-5990, http:/www.asme.org.5Available from Manufacturers Standardization Society of the Valve and FittingsIndustry (MSS), 127
16、 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internat
17、ionally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1MSS SP-83 Steel Pipe Unions, Socket-Welding andThre
18、adedMSS SP-95 Swage(d) Nipples and Bull PlugsMSS SP-97 Integrally Reinforced Forged Branch OutletFittingsSocket Welding, Threaded and ButtweldingEnds2.4 ASME Boiler and Pressure Vessel Code:4Section VIII Division ISection IX2.5 AWS Standards:6A 5.4 Specification for Corrosion-Resisting Chromium andC
19、hromium-Nickel Steel Covered Welding ElectrodesA 5.9 Specification for Corrosion-Resisting Chromium andChromium-Nickel Steel Welding Rods and Bare Elec-trodesA 5.11 Specification for Nickel and Nickel-Alloy WeldingElectrodes for Shielded Metal Arc WeldingA5.14 Specification for Nickel and Nickel-All
20、oy Bare Weld-ing Rods and Electrodes2.6 ASNT:7SNT-TC-1A (1984) Recommended Practice for Nondestruc-tive Testing Personnel Qualification and Certification3. Common Requirements and Ordering Information3.1 Material furnished to this specification shall conform tothe requirements of Specification A960/
21、A960M including anysupplementary requirements that are indicated in the purchaseorder. Failure to comply with the common requirements ofSpecification A960/A960M constitutes nonconformance withthis specification. In case of conflict between this specificationand Specification A960/A960M, this specifi
22、cation shall pre-vail.3.2 Specification A960/A960M identifies the ordering infor-mation that should be complied with when purchasing materialto this specification.4. Material4.1 The material for fittings shall consist of forgings, bars,plates, or seamless or welded tubular products that conform toth
23、e chemical requirements in Table 2. See Table 3 for a list ofcommon names.4.2 The steel shall be melted by one of the followingprocesses:4.2.1 Electric furnace (with separate degassing and refiningoptional),4.2.2 Vacuum furnace, or4.2.3 One of the former followed by vacuum or electroslag-consumable
24、remelting.4.3 If secondary melting is employed, the heat shall bedefined as all ingots remelted from a primary heat.4.4 Grain SizeAnnealed Alloys UNS N08810 and UNSN08811 shall conform to an average grain size of ASTM No.5 or coarser.5. Manufacture5.1 FormingForging or shaping operations may be per-
25、formed by hammering, pressing, piercing, extruding, upsetting,rolling, bending, fusion welding, machining, or by a combina-tion of two or more of these operations. The forming procedureshall be so applied that it will not produce injurious defects inthe fittings.5.2 All fittings shall be heat treate
26、d in accordance withSection 6.5.3 Grade WP fittings ordered as Class S shall be ofseamless construction and shall meet all requirements ofASME B16.9, ASME B16.11, MSS SP-79, MSS SP-83, MSSSP-95, or MSS SP-97.5.4 Grade WP fittings ordered as Class W shall meet therequirements of ASME B16.9 and:5.4.1
27、Shall have all pipe welds made by mill or the fittingmanufacturer with the addition of filler metal radiographicallyexamined throughout the entire length in accordance with theCode requirements stated in 5.5, and,5.4.2 Radiographic inspection is not required on singlelongitudinal seam welds made by
28、the starting pipe manufac-turer if made without the addition of filler metal; and5.4.3 Radiographic inspection is not required on longitudi-nal seam fusion welds made by the fitting manufacturer whenall of the following conditions have been met:5.4.3.1 No addition of filler metal,5.4.3.2 Only one we
29、lding pass per weld seam, and,5.4.3.3 Fusion welding from one side only.5.4.4 In place of radiographic examination, welds made bythe fitting manufacturer may be ultrasonically examined inaccordance with the Code requirements stated in 5.6.5.5 Grade WP fittings ordered as Class WX shall meet therequi
30、rements ofASME B16.9 and shall have all welds, whethermade by the fitting manufacturer or the starting materialmanufacturer, radiographically examined throughout their en-tire length in accordance with Paragraph UW-51 of SectionVIII, Division I, of theASME Boiler and Pressure Vessel Code.5.6 Grade W
31、P fittings ordered as Class WU shall meet therequirements ofASME B16.9 and shall have all welds, whethermade by the fitting manufacturer or the starting materialmanufacturer, ultrasonically examined throughout their entirelength in accordance with Appendix 12 of Section VIII,Division 1 of ASME Boile
32、r and Pressure Vessel Code.5.7 The radiography or ultrasonic examination of welds forthis class of fittings may be done at the option of themanufacturer, either prior to or after forming.6Available from American Welding Society (AWS), 550 NW LeJeune Rd.,Miami, FL 33126, http:/www.aws.org.7Available
33、fromAmerican Society for Nondestructive Testing (ASNT), P.O. Box28518, 1711 Arlingate Ln., Columbus, OH 43228-0518, http:/www.asnt.org.TABLE 1 Fitting Classes for WP GradesClass Construction Nondestructive ExaminationS Seamless NoneW Welded Radiography or UltrasonicWX Welded RadiographyWU Welded Ult
34、rasonicA403/A403M 18a2TABLE2ChemicalRequirementsNOTE1Whereanellipsis(.)appearsinthistable,thereisnorequirementandtheelementneedneitherbeanalyzedfororreported.GradeAComposition,%GradeWPGradeCRUNSDes-ignationCarbonBManga-neseBPhos-phorousBSul-phurBSiliconBNickelChromiumMolybdenumTitaniumNitrogenCOther
35、sWPXM-19CRXM-19S209100.064.06.00.0450.0301.0011.513.520.523.51.503.00.0.200.40EWP20CBCR20CBN080200.072.000.0450.0351.0032.038.019.021.02.003.00.Cu3.04.0NbD8XCmin,1.00maxWP6XNCR6XNN083670.0302.000.0400.0301.0023.525.520.022.06.07.0.0.180.25Cu0.75WP700CR700N087000.042.000.0400.0301.0024.026.019.023.04
36、.35.0Cu0.50NbD8XCminWPNICCRNICN088000.101.500.0450.0151.0030.035.019.023.0.0.150.60.Al0.150.60Cu0.75Fe39.5minWPNIC10CRNIC10N088100.050.101.500.0450.0151.0030.035.019.023.0.0.150.60.Al0.150.60Cu0.75Fe39.5minWPNIC11CRNIC11N088110.060.101.500.0400.0151.0030.035.019.023.0.0.150.60.Al0.150.60Cu0.75Fe39.5
37、minWP904LCR904LN089040.0202.000.0450.0351.0023.028.019.023.04.05.0.0.10Cu1.02.0WP1925CR1925N089250.0201.000.0450.0300.5024.026.019.021.06.07.00.100.20Cu0.81.5WP1925NCR1925NN089260.0202.000.0300.0100.5024.026.019.021.06.07.0.0.150.25Cu0.51.5WP304CR304S304000.082.000.0450.0301.008.011.018.020.0.WP304L
38、CR304LS304030.030F2.000.0450.0301.008.012.018.020.0.WP304HCR304HS304090.040.102.000.0450.0301.008.011.018.020.0.WP304NCR304NS304510.082.000.0450.0301.008.011.018.020.0.0.100.16.WP304LNCR304LNS304530.0302.000.0450.0301.008.011.018.020.0.0.100.16.WP309CR309S309000.202.000.0450.0301.0012.015.022.024.0.
39、WP310SCR310SS310080.082.000.0450.0301.0019.022.024.026.0.WP310HCR310HS310090.040.102.000.0450.0301.0019.0022.024.026.0.WPS31254CRS31254S312540.0201.000.0300.0100.8017.518.519.520.56.06.5.0.180.25Cu0.501.00WPS31266CRS31266S312660.0302.004.000.0350.0201.0021.0024.0023.0025.005.26.2.0.350.60Cu1.002.50W
40、1.502.50WP316CR316S316000.082.000.0450.0301.0010.014.016.018.02.003.00.WP316LCR316LS316030.030F2.000.0450.0301.0010.014.0G16.018.02.003.00.WP316HCR316HS316090.040.102.000.0450.0301.0010.014.016.018.02.003.00.WP316NCR316NS316510.082.000.0450.0301.0010.013.016.018.02.003.00.0.100.16.WP316LNCR316LNS316
41、530.0302.000.0450.0301.0010.013.016.018.02.003.00.0.100.16.WP317CR317S317000.082.000.0450.0301.0011.015.018.020.03.04.0.WP317LCR317LS317030.0302.000.0450.0301.0011.015.018.020.03.04.0.WPS31725CRS31725S317250.0302.000.0450.0301.0013.517.518.020.04.05.0.0.20.WPS31726CRS31726S317260.0302.000.0450.0301.
42、0013.517.517.020.04.05.0.0.100.20.WPS31727CRS31727S317270.0301.000.0300.0301.0014.516.517.519.03.84.5.0.150.21Cu2.84.0WPS31730CRS31730S317300.0302.000.0400.0101.0015.016.517.019.03.04.0.0.045Cu4.05.0WPS32053CRS32053S320530.0301.000.0300.0101.0024.026.022.024.05.06.0.0.170.22.WP321CR321S321000.082.00
43、0.0450.0301.009.012.017.019.0.H.WP321HCR321HS321090.040.102.000.0450.0301.009.012.017.019.0.I.WPS33228CRS33228S332280.040.081.000.0200.0150.3031.033.026.028.0.Ce0.050.10A403/A403M 18a3TABLE2ContinuedGradeAComposition,%GradeWPGradeCRUNSDes-ignationCarbonBManga-neseBPhos-phorousBSul-phurBSiliconBNicke
44、lChromiumMolybdenumTitaniumNitrogenCOthersAl0.025NbD0.61.0WPS34565CRS34565S345650.0305.07.00.0300.0101.0016.018.023.025.04.05.0.0.400.60NbD0.10WP347CR347S347000.082.000.0450.0301.009.012.017.019.0.JWP347HCR347HS347090.040.102.000.0450.0301.009.012.017.019.0.KWP347LNCR347LNS347510.005 0.0202.000.0450
45、.0301.009.013.017.019.0.NbD0.200.50,LN0.060.10CWP348CR348S348000.082.000.0450.0301.009.012.017.019.0.NbD+Ta=10(C)1.10Ta0.10Co0.20WP348HCR348HS348090.040.102.000.0450.0301.009.012.017.019.0.NbD+Ta=8(C)1.10Ta0.10Co0.20WPS38815CRS38815S388150.0302.000.0400.0205.56.515.017.013.015.00.751.50.Cu0.751.50Al
46、0.30ASeeSection15formarkingrequirements.BMaximum,unlessotherwiseindicated.CThemethodofanalysisfornitrogenshallbeamatterofagreementbetweenthepurchaserandmanufacturer.DNiobiumandcolumbiumareinterchangeablenamesforthesameelementandbothnamesareacceptableforuseinA01.22specifications.ENiobium(columbium)0.
47、100.30%;Vanadium,0.100.30%.FForsmalldiameterorthinwalls,orboth,wheremanydrawingpassesarerequired,acarbonmaximumof0.040%isnecessaryingradesTP304LandTP316L.Smalloutsidediametertubesaredefinedasthoselessthan0.500in.12.7mminoutsidediameterandlightwalltubesasthoselessthan0.049in.1.24mminaveragewallthickn
48、ess.GOnpiercedtubing,thenickelmaybe11.016.0%.H5X(C+N)min0.70max.I4X(C+N)min0.70max.JTheniobium(columbium)contentshallbenotlessthantentimesthecarboncontentandnotmorethan1.10%.KTheniobium(columbium)contentshallbenotlessthaneighttimesthecarboncontentandnotmorethan1.10%.LTheniobium(columbium)contentshallbenotlessthan15timesthecarboncontent.A403/A403M 18a45.8 Personnel performing NDE examinations shall be quali-fied in accordance with SNT-TC-1A.5.9 Grade CR fittings shall meet the req
