1、Designation: A403/A403M 10Standard 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 last
2、 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 Department of Defense.1. Scope*1.1 This specification covers wrought stainl
3、ess 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 stainle
4、ss 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 applica
5、ble 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” specification des
6、ignation (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; therefore
7、, 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 A744/A7
8、44M.2. Referenced Documents2.1 ASTM Standards:3A351/A351M Specification for Castings, Austenitic, forPressure-Containing PartsA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA743/A743M Specification for Castings, Iron-Chromium,Iron-Chromium-Nickel, Corrosion Resistant, for G
9、eneralApplicationA744/A744M Specification for 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 Method
10、s for Determining Average Grain SizeE165 Practice for Liquid Penetrant Examination for GeneralIndustry2.2 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 Va
11、lves, Fittings,Flanges, and UnionsMSS 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
12、of SubcommitteeA01.22 on Steel Forgings and Wrought Fittings for PipingApplications and BoltingMaterials for Piping and Special Purpose Applications.Current edition approved May 1, 2010. Published June 2010. Originallyapproved in 1956. Last previous edition approved in 2009 as A403/A403M09.DOI: 10.1
13、520/A0403_A0403M-10.2For ASME 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 in
14、formation, refer to the standards Document Summary page onthe ASTM website.4Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.asme.org.5Available from Manufacturers Standardization Society of the Valve
15、and FittingsIndustry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.MSS SP-83 Steel Pipe Unions, Socket
16、-Welding andThreadedMSS 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 I, Pressure VesselsSection IX, Welding Qualifications2.5 AWS Standards:
17、6A 5.4 Specification for Corrosion-Resisting Chromium andChromium-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 Meta
18、l Arc Welding2.6 ASNT:7SNT-TC-1A (1984) Recommended Practice for Nonde-structive Testing Personnel Qualification and Certification3. Common Requirements and Ordering Information3.1 Material furnished to this specification shall conform tothe requirements of Specification A960/A960M including anysupp
19、lementary 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 specification shall pre-vail.3
20、.2 SpecificationA960/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 tothe chemical requirements
21、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 remelting.4.3 If seconda
22、ry melting is employed, the heat shall bedefined as all ingots remelted from a primary heat.5. Manufacture5.1 FormingForging or shaping operations may be per-formed by hammering, pressing, piercing, extruding, upsetting,rolling, bending, fusion welding, machining, or by a combina-tion of two or more
23、 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 treated in accordance withSection 6.5.3 Grade WP fittings ordered as Class S shall be ofseamless construction and shall meet all requirements ofASME
24、 B16.9, ASME B16.11, MSS SP-79, MSS SP-83, MSSSP-95,orMSS SP-97.5.4 Grade WP fittings ordered as Class W shall meet therequirements of ASME B16.9 and:5.4.1 Shall have all pipe welds made by mill or the fittingmanufacturer with the addition of filler metal radiographicallyexamined throughout the enti
25、re 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 the starting pipe manufac-turer if made without the addition of filler metal; and5.4.3 Radiographic inspection is not required on longitudi-nal
26、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 welding 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 man
27、ufacturer may be ultrasonically examined inaccordance with the Code requirements stated in 5.6.5.5 Grade WP fittings ordered as Class WX shall meet therequirements of ASME B16.9 and shall have all welds,whether made by the fitting manufacturer or the startingmaterial manufacturer, radiographically e
28、xamined throughouttheir entire length in accordance with Paragraph UW-51 ofSection VIII, Division I, of the ASME Boiler and PressureVessel Code.5.6 Grade WP fittings ordered as Class WU shall meet therequirements of ASME B16.9 and shall have all welds,whether made by the fitting manufacturer or the
29、startingmaterial manufacturer, ultrasonically examined throughouttheir entire length in accordance with Appendix 12 of SectionVIII, Division 1 of ASME Boiler and Pressure Vessel Code.5.7 The radiography or ultrasonic examination of welds forthis class of fittings may be done at the option of themanu
30、facturer, either prior to or after forming.5.8 Personnel performing NDE examinations shall be quali-fied in accordance with SNT-TC-1A.5.9 Grade CR fittings shall meet the requirements of MSSSP-43 and do not require nondestructive examination.5.10 All fittings shall have the welders, welding operator
31、s,and welding procedures qualified under the provisions ofSection IX of the ASME Boiler and Pressure Vessel Code6Available from American Welding Society (AWS), 550 NW LeJeune Rd.,Miami, FL 33126, http:/www.aws.org.7Available fromAmerican Society for Nondestructive Testing (ASNT), P.O. Box28518, 1711
32、 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 UltrasonicA403/A403M 102except that starting pipe welds made without the addit
33、ion offiller metal do not require such qualification.5.11 All joints welded with filler metal shall be finished inaccordance with the requirements of Paragraph UW-35 (a) ofSection VIII, Division I, of the ASME Boiler and PressureVessel Code.5.12 Fittings machined from bar shall be restricted to NPS
34、4or smaller. Elbows, return bends, tees, and header tees shall notbe machined directly from bar stock.5.12.1 All caps machined from bar shall be examined byliquid penetrant in accordance with Supplementary Require-ment S52 in Specification A960/A960M.TABLE 2 Chemical RequirementsNOTE 1Where an ellip
35、sis (.) appears in this table, there is no requirement.GradeAComposition, %Grade WP Grade CR UNS Des-ignationCBMnBPBSBSiBNi Cr Mo Ti N2CCOthersWPXM-19 CRXM-19 S20910 0.06 4.06.0 0.045 0.030 1.00 11.513.5 20.523.5 1.503.00 . . . 0.200.40DWP304 CR304 S30400 0.08 2.00 0.045 0.030 1.00 8.011.0 18.020.0
36、. . . . . . . . . . . .WP304L CR304L S30403 0.030E2.00 0.045 0.030 1.00 8.012.0 18.020.0 . . . . . . . . . . . .WP304H CR304H S30409 0.040.10 2.00 0.045 0.030 1.00 8.011.0 18.020.0 . . . . . . . . . . . .WP304N CR304N S30451 0.08 2.00 0.045 0.030 1.00 8.011.0 18.020.0 . . . . . . 0.100.16.WP304LN CR
37、304LN S30453 0.030 2.00 0.045 0.030 1.00 8.011.0 18.020.0 . . . . . . 0.100.16.WP309 CR309 S30900 0.20 2.00 0.045 0.030 1.00 12.015.0 22.024.0 . . . . . . . . . . . .WP310S CR310S S31008 0.08 2.00 0.045 0.030 1.00 19.022.0 24.026.0 . . . . . . . . . . . .WPS31254 CRS31254 S31254 0.020 1.00 0.030 0.0
38、10 0.80 17.518.5 19.520.5 6.06.5 . . . 0.180.22Cu 0.501.00WP316 CR316 S31600 0.08 2.00 0.045 0.030 1.00 10.014.0 16.018.0 2.003.00 . . . . . . . . .WP316L CR316L S31603 0.030E2.00 0.045 0.030 1.00 10.014.0F16.018.0 2.003.00 . . . . . . . . .WP316H CR316H S31609 0.040.10 2.00 0.045 0.030 1.00 10.014.
39、0 16.018.0 2.00-3.00 . . . . . . . . .WP316N CR316N S31651 0.08 2.00 0.045 0.030 1.00 10.013.0 16.018.0 2.003.00 . . . 0.10-0.16.WP316LN CR316LN S31653 0.030 2.00 0.045 0.030 1.00 10.013.0 16.018.0 2.003.00 . . . 0.100.16.WP317 CR317 S31700 0.08 2.00 0.045 0.030 1.00 11.015.0 18.020.0 3.04.0 . . . .
40、 . . . . .WP317L CR317L S31703 0.030 2.00 0.045 0.030 1.00 11.015.0 18.020.0 3.04.0 . . . . . . . . .WPS31725 CRS31725 S31725 0.030 2.00 0.045 0.030 1.00 13.517.5 18.020.0 4.05.0 . . . 0.20 . . .WPS31726 CRS31726 S31726 0.030 2.00 0.045 0.030 1.00 13.517.5 17.020.0 4.05.0 . . . 0.100.20.WPS31727 CRS
41、31727 S31727 0.030 1.00 0.030 0.030 1.00 14.516.5 17.519.0 3.84.5 . . . 0.150.21Cu 2.84.0WPS32053 CRS32053 S32053 0.030 1.00 0.030 0.010 1.00 24.026.0 22.024.0 5.06.0 . . . 0.170.22.WP321 CR321 S32100 0.08 2.00 0.045 0.030 1.00 9.012.0 17.019.0 . . .G. .WP321H CR321H S32109 0.040.10 2.00 0.045 0.030
42、 1.00 9.012.0 17.019.0 . . .H. .WPS33228 CRS33228 S33228 0.040.08 1.00 0.020 0.015 0.30 31.033.0 26.028.0 . . . . . . . . . Ce 0.050.10Al 0.025Cb 0.61.0WPS34565 CRS34565 S34565 0.030 5.07.0 0.030 0.010 1.00 16.018.0 23.025.0 4.05.0 . . . 0.400.60Cb 0.10WP347 CR347 S34700 0.08 2.00 0.045 0.030 1.00 9
43、.012.0 17.019.0 . . . . . . . . .IWP347H CR347H S34709 0.040.10 2.00 0.045 0.030 1.00 9.012.0 17.019.0 . . . . . . . . .JWP348 CR348 S34800 0.08 2.00 0.045 0.030 1.00 9.012.0 17.019.0 . . . . . . . . . Cb+Ta=103(C)1.10Ta 0.10Co 0.20WP348H CR348H S34809 0.040.10 2.00 0.045 0.030 1.00 9.012.0 17.019.0
44、 . . . . . . . . . Cb+Ta=83(C)1.10Ta 0.10Co 0.20WPS38815 CRS38815 S38815 0.030 2.00 0.040 0.020 5.5-6.5 13.0-17.0 13.0-15.0 0.75-1.50 . . . . . . Cu 0.75-1.50Al 0.30ASee Section 15 for marking requirements.BMaximum, unless otherwise indicated.CThe method of analysis for nitrogen shall be a matter of
45、 agreement between the purchaser and manufacturer.DColumbium 0.100.30 %; Vanadium, 0.100.30 %.EFor small diameter or thin walls, or both, where many drawing passes are required, a carbon maximum of 0.040 % is necessary in grades TP304L and TP316L. Smalloutside diameter tubes are defined as those les
46、s than 0.500 in. 12.7 mm in outside diameter and light wall tubes as those less than 0.049 in. 1.24 mm in average wallthickness.FOn pierced tubing, the nickel may be 11.016.0 %.G5X(C+N2)0.70.H4X(C+N2)0.70.IThe columbium content shall be not less than ten times the carbon content and not more than 1.
47、10 %.JThe columbium content shall be not less than eight times the carbon content and not more than 1.10 %.A403/A403M 1035.13 Weld buildup is permitted to dimensionally correctunfilled areas produced during cold forming of stub ends.Radiographic examination of the weld buildup shall not berequired p
48、rovided that all the following steps are adhered to:5.13.1 The weld procedure and welders or welding opera-tors meet the requirements of 5.10.5.13.2 Annealing is performed after welding and prior tomachining.5.13.3 All weld surfaces are liquid penetrant examined inaccordance with Appendix 8 of Secti
49、on VIII, Division 1 of theASME Boiler and Pressure Vessel Code.5.13.4 Repair of areas in the weld is permitted, but 5.13.1,5.13.2, and 5.13.3 must be repeated.5.14 Stub ends may be produced with the entire lap added asweld metal to a straight pipe section provided the weldingsatisfies the requirements of 5.10 for qualifications and Section6 for post weld heat treatment.5.14.1 Grade WP Class WRadiographic inspection of theweld is required. See 5.4.5.14.2 Grade WP Class
