1、Designation: A351/A351M 10Standard Specification forCastings, Austenitic, for Pressure-Containing Parts1This standard is issued under the fixed designation A351/A351M; 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 Department of Defense.1. Scope*1.1 This specification2covers austenitic st
3、eel castings forvalves, flanges, fittings, and other pressure-containing parts(Note 1).NOTE 1Carbon steel castings for pressure-containing parts are cov-ered by Specification A216/A216M, low-alloy steel castings by Specifi-cation A217/A217M, and duplex stainless steel castings by SpecificationA995/A
4、995M.1.2 A number of grades of austenitic steel castings areincluded in this specification. Since these grades possessvarying degrees of suitability for service at high temperaturesor in corrosive environments, it is the responsibility of thepurchaser to determine which grade shall be furnished. Sel
5、ec-tion will depend on design and service conditions, mechanicalproperties, and high-temperature or corrosion-resistant charac-teristics, or both.1.2.1 Because of thermal instability, Grades CE20N, CF3A,CF3MA, and CF8A are not recommended for service attemperatures above 800F 425C.1.2.2 Because of e
6、mbrittlement phases, Grade CD4MCu isnot recommended for service at temperatures above 600F316C.1.3 Supplementary requirements of an optional nature areprovided for use at the option of the purchaser. The Supple-mentary requirements shall apply only when specified indi-vidually by the purchaser in th
7、e purchase order or contract.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may r
8、esult in non-conformancewith the standard.1.4.1 This specification is expressed in both inch-poundunits and in SI units; however, unless the purchase order orcontract specifies the applicable M specification designation(SI units), the inch-pound units shall apply. Within the text, theSI units are sh
9、own in brackets or parentheses.2. Referenced Documents2.1 ASTM Standards:3A216/A216M Specification for Steel Castings, Carbon,Suitable for Fusion Welding, for High-Temperature Ser-viceA217/A217M Specification for Steel Castings, MartensiticStainless and Alloy, for Pressure-Containing Parts, Suit-abl
10、e for High-Temperature ServiceA488/A488M Practice for Steel Castings, Welding, Quali-fications of Procedures and PersonnelA703/A703M Specification for Steel Castings, General Re-quirements, for Pressure-Containing PartsA985/A985M Specification for Steel Investment CastingsGeneral Requirements, for P
11、ressure-Containing PartsA995/A995M Specification for Castings,Austenitic-Ferritic(Duplex) Stainless Steel, for Pressure-Containing PartsE165 Practice for Liquid Penetrant Examination for GeneralIndustryE709 Guide for Magnetic Particle Testing2.2 Manufacturers Standardization Society of the Valve and
12、Fittings Industry Standard:4SP-55 Quality Standard for Steel Castings for Valves,Flanges, and Fittings and Other Components (VisualMethod)3. General Conditions for Delivery3.1 Other than investment castings Material furnished tothis specification shall conform to the requirements of Speci-fication A
13、703/A703M, including any supplementary require-ments that are indicated in the purchase order. Failure tocomply with the general requirements of Specification A703/1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct respon
14、sibility of SubcommitteeA01.18 on Castings.Current edition approved April 1, 2010. Published April 2010. Originallyapproved in 1952. Last previous edition approved in 2006 as A351/A351M 06.DOI: 10.1520/A0351_A0351M-10.2For ASME Boiler and Pressure Vessel Code applications, see related Specifi-cation
15、 SA-351/SA-351M 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 standards Document Summary page onthe ASTM website.4Available from Ma
16、nufacturers Standardization Society of the Valve 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,
17、United States.A703M constitutes nonconformance with this specification. Incase of conflict between the requirements of this specificationand Specification A703/A703M, this specification shall pre-vail.3.2 Investment Castings Material furnished to this speci-fication shall conform to the requirements
18、 of SpecificationA985/A985M, including any supplementary requirements thatare indicated in the purchase order. Failure to comply with thegeneral requirements of SpecificationA985/A985M constitutesnonconformance with this specification. In case of conflictbetween the requirements of this specificatio
19、n and Specifica-tion A985/A985M, Specification A985/A985M shall prevail.3.3 The post weld heat treatment requirements of Supple-mentary Requirement S11 may be specified when austeniticcastings other than HK, HT, or CT15C are to be subjected tosevere corrosive service.4. Ordering Information4.1 The i
20、nquiry and order should include or indicate thefollowing:4.1.1 A description of the casting by pattern number ordrawing (dimensional tolerances shall be included on thecasting drawing),4.1.2 Grade of steel,4.1.3 Options in the specification, and4.1.4 Supplementary requirements desired, including the
21、standards of acceptance.5. Process5.1 The steel shall be made by the electric furnace processwith or without separate refining such as argon-oxygen decar-burization (AOD).6. Heat Treatment6.1 All castings shall receive a heat treatment at the tem-perature specified in Table 1, followed by a quench i
22、n water orrapid cool by other means except as noted.NOTE 2Proper heat treatment of these alloys is usually necessary toenhance corrosion resistance and in some cases to meet mechanicalproperties. Minimum heat-treat temperatures are specified; however, it issometimes necessary to heat-treat at higher
23、 temperatures, hold for someminimum time at temperature, and then rapidly cool the castings in orderto enhance the corrosion resistance and meet mechanical properties.7. Chemical Composition7.1 The steel shall conform to the requirements as tochemical composition prescribed in Table 2.8. Tensile Pro
24、perties8.1 Steel used for the castings shall conform to the require-ments as to tensile properties prescribed in Table 3.9. Quality9.1 The surface of the casting shall be examined visuallyand shall be free of adhering sand, scale, cracks, and hot tears.Other surface discontinuities shall meet the vi
25、sual acceptancestandards specified in the order. Visual Method SP-55 or othervisual standards may be used to define acceptable surfacediscontinuities and finish. Unacceptable visual surface discon-tinuities shall be removed and their removal verified by visualexamination of the resultant cavities.9.
26、2 When additional inspection is desired, SupplementaryRequirements S5, S6, and S10 may be ordered.9.3 The castings shall not be peened, plugged, or impreg-nated to stop leaks.10. Repair by Welding10.1 Repairs shall be made using procedures and weldersqualified under Practice A488/A488M.10.2 Weld rep
27、airs shall be inspected to the same qualitystandards that are used to inspect the castings. When castingsare produced with Supplementary Requirement S5 specified,weld repairs on castings that have leaked on hydrostatic test, oron castings in which the depth of any cavity prepared for repairwelding e
28、xceeds 20 % of the wall thickness or 1 in. 25 mm,whichever is smaller, or on castings in which any cavityprepared for welding is greater than approximately 10 in.265cm2, shall be radiographed to the same standards that are usedto inspect the castings. When castings are produced withSupplementary Req
29、uirement S6 specified, weld repairs shall beinspected by liquid penetrant examination to the same stan-dards that are used to inspect the castings.NOTE 3When austenitic steel castings are to be used in serviceswhere they will be subject to stress corrosion, the purchaser should soindicate in his ord
30、er and such castings should be solution-heat treatedfollowing all weld repairs.11. Keywords11.1 austenitic stainless steel; pressure containing parts;stainless steel; steel castingsTABLE 1 Heat-Treatment RequirementsGradeTemperature, minF CHK30, HK40, HT30, CT15C as-cast as-castCF3, CF3A, CF8, CF8A,
31、 CF3M,CF3MA, CF8M, CF3MN, CG3M, CF10,CF10M, CG8M1900 1040CF10SMnN, CF8C, CF10MC 1950 1065CN7M, CG6MMN, CE8MN 2050 1120CK3MCuN, CN3MN, CH8, CH10, CH20,CK202100 1150CE20NA2225 1220AGrade shall be quenched in water or the castings may be furnace cooled to2050F 1120C minimum, held for 15 min minimum and
32、 then quenched in wateror rapidly cooled by other means.A351/A351M 102TABLE 2 Chemical RequirementsNOTECD4MCu and CD3MWCuN have been deleted from this specification and added to Specification A995/A995M. They may now be suppliedand purchased in compliance with Specification A995/A995M as grades 1B a
33、nd 6A respectively.Element, %(max, ex-cept whererange isgiven)CF3,CF3AJ92700CF8,CF8AJ92600CF3M,CF3MAJ92800CF8MJ92900CF3MNJ92804CF8CJ92710CF10J92950CF10MJ92901CH8J93400CH10J93401CH20J93402CK20J94202HK30J94203HK40J94204Carbon 0.03 0.08 0.03 0.08 0.03 0.08 0.04 0.04 0.08 0.04 0.04 0.04 0.25 0.350.10 0.
34、10 0.10 0.20 0.20 0.35 0.45Manganese 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50Silicon 2.00 2.00 1.50 1.50 1.50 2.00 2.00 1.50 1.50 2.00 2.00 1.75 1.75 1.75Sulfur 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040Phosphorus 0.040 0.040 0.04
35、0 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040Chromium 17.0 18.0 17.0 18.0 17.0 18.0 18.0 18.0 22.0 22.0 22.0 23.0 23.0 23.021.0 21.0 21.0 21.0 21.0 21.0 21.0 21.0 26.0 26.0 26.0 27.0 27.0 27.0Nickel 8.012.08.011.09.013.09.012.09.013.09.012.08.011.09.012.012.015.012.015.012.015.
36、019.022.019.022.019.022.0Molybde- 0.50 0.50 2.0 2.0 2.0 0.50 0.50 2.0 0.50 0.50 0.50 0.50 0.50 0.50num 3.0 3.0 3.0 3.0Columbium . . . . . . . . . . . . . . .A. . . . . . . .(niobium)Vanadium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Nitrogen . . . . . . . . .
37、 . . . 0.10 . . . . . . . . . . . . . . . . . . . . . . . . . . .0.20Copper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Element, %(max, ex-cept whererange isgiven)HT30N08030CF10MCCN7MN08007CN3MNJ94651CE8MNCG-6MMNJ93790CG8MJ93000CF10S-MnNJ92972CT15CN08151CK-3MCu
38、NJ93254CE20NJ92802CG3MJ92999Carbon 0.25 0.10 0.07 0.03 0.08 0.06 0.08 0.10 0.05 0.025 0.20 0.030.35 max 0.15Manganese 2.00 1.50 1.50 2.00 1.00 4.00 1.50 7.00 0.15 1.20 1.50 1.50max 6.00 9.00 1.50Silicon 2.50 1.50 1.50 1.00 1.50 1.00 1.50 3.50 0.50 1.00 1.50 1.50max 4.50 1.50Sulfur 0.040 0.040 0.040
39、0.010 0.040 0.030 0.04 0.030 0.03 0.010 0.040 0.04maxPhosphorus 0.040 0.040 0.040 0.040 0.040 0.040 0.04 0.060 0.03 0.045 0.040 0.04maxChromium 13.0 15.0 19.0 20.0 22.5 20.50 18.0 16.0 19.0 19.5 23.0 18.017.0 18.0 22.0 22.0 25.5 23.50 21.0 18.0 21.0 20.5 26.0 21.0Nickel 33.037.013.016.027.530.523.52
40、5.58.011.011.5013.509.013.08.09.031.034.017.519.58.011.09.013.0Molybde- 0.50 1.75 2.0 6.0 3.0 1.50 3.0 . . . . . . 6.0 0.50 3.0num 2.25 3.0 7.0 4.5 3.00 4.0 7.0 4.0Columbium . . .B. . . 0.10 . . 0.50 . . .(niobium) 0.30 1.50Vanadium . . . . . . . . . . . . . . . 0.10 . . . . . . . . . . . . . . . .
41、. .0.30Nitrogen . . . . . . . . . 0.18 0.10 0.20 . . . 0.08 . . . 0.18 0.08 . . .0.26 0.30 0.40 0.18 0.24 0.20Copper . . . . . . 3.04.00.75max. . . . . 0.501.00. .AGrade CF8C shall have a columbium content of not less than 8 times the carbon content but not over 1.00 %.BGrade CF10MC shall have a col
42、umbium content of not less than 10 times the carbon content but not over 1.20 %.A351/A351M 103SUPPLEMENTARY REQUIREMENTSThe following supplementary requirements shall not apply unless specified in the purchase order. Alist of standardized supplementary requirements for use at the option of the purch
43、aser is included inSpecifications A703/A703M and A985/A985M. Those which are ordinarily considered suitable foruse with this specification are given below. Others enumerated in Specifications A703/A703M andA985/A985M may be used with this specification upon agreement between the manufacturer andpurc
44、haser.S2. Destruction TestsS5. Radiographic InspectionS6. Liquid Penetrant InspectionS10. Examination of Weld PreparationS10.1 The method of performing the magnetic particle orliquid penetrant test shall be in accordance with Practice E165or Practice E709.S11. Post Weld Heat TreatmentS11.1 All auste
45、nitic castings, except Grades HK, HT, andCT15C, which have been subjected to weld repairs, shall begiven a post-weld solution heat treatment.S33. Stabilization Heat Treatment of CF8CS33.1 CF8C shall be stabilized at 1600-1650F (870-900C) for a minimum time of 1 h/in. (25 mm) of thickness andwater qu
46、enched or rapidly cooled by other means. The gradedesignation symbol shall be followed by the symbol “S33.”SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue(A351/A351M 06) that may impact the use of this standard. (Approved April 1,
47、 2010.)(1) Added Supplementary Requirement S33.(2) Added reference to A985/A985M to the SUPPLEMEN-TARY REQUIREMENTS text.TABLE 3 Tensile RequirementsCF3J92700CF3AJ92700CF8J92600CF8AJ92600CF3MJ92800CF-3MAJ92800CF8MJ92900CF-3MNJ92804CF8CJ92710CF10J92950CF10MJ92901CH8J93400CH10J93401CH20J93402CK20J9420
48、2HK30J94203HK40J94204Tensile strength, 70 77 70 77 70 80 70 75 70 70 70 65 70 70 65 65 62min, ksi MPa 485 530 485 530 485 550 485 515 485 485 485 450 485 485 450 450 425Yield strength,A30 35 30 35 30 37 30 37 30 30 30 28 30 30 28 35 35min, ksi MPa 205 240 205 240 205 255 205 255 205 205 205 195 205
49、205 195 240 240Elongation in2 in. or50 mm,Bmin, %35.0 35.0 35.0 35.0 30.0 30.0 30.0 35.0 30.0 35.0 30.0 30.0 30.0 30.0 30.0 10.0 10.0HT30N08030CF-10MCCN7MN08007CN-3MNJ94651CE-8MNCG6MMNJ93790CG8MJ93000CF10S-MnNJ92972CT15CN08151CK-3MCuNJ93254CE20NJ92802CG3MJ92999Tensile strength, 65 70 62 80 95 85 75 85 63 80 80 75min, ksi MPa 450 485 425 550 655 585 515 585 435 550
