1、Designation: A 351/A 351M 06Standard Specification forCastings, Austenitic, for Pressure-Containing Parts1This standard is issued under the fixed designationA 351/A 351M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of
2、last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) 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 austeniti
3、c steel castings forvalves, flanges, fittings, and other pressure-containing parts(Note 1).NOTE 1Carbon steel castings for pressure-containing parts are cov-ered by Specification A 216/A 216M, low-alloy steel castings by Speci-fication A 217/A 217M, and duplex stainless steel castings by Specifica-t
4、ion A 995/A 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 fu
5、rnished. Selec-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
6、Because of embrittlement 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 pur
7、chaser in the purchase order or contract.1.4 This specification is expressed in both inch-pound unitsand in SI units; however, unless the purchase order or contractspecifies the applicable M specification designation (SI units),the inch-pound units shall apply. The values stated in eitherinch-pound
8、units or SI units are to be regarded separately asstandard. Within the text, the SI units are shown in brackets.The values stated in each system may not be exact equivalents;therefore, each system shall be used independently of the other.Combining values from the two systems may result in noncon-for
9、mance with the standard.2. Referenced Documents2.1 ASTM Standards:3A 216/A 216M Specification for Steel Castings, Carbon,Suitable for Fusion Welding, for High-Temperature Ser-viceA 217/A 217M Specification for Steel Castings, MartensiticStainless and Alloy, for Pressure-Containing Parts, Suit-able f
10、or High-Temperature ServiceA 488/A 488M Practice for Steel Castings, Welding, Quali-fications of Procedures and PersonnelA 703/A 703M Specification for Steel Castings, GeneralRequirements, for Pressure-Containing PartsA 985/A 985M Specification for Steel Investment CastingsGeneral Requirements, for
11、Pressure-Containing PartsA 995/A 995M Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-ContainingPartsE 165 Test Method for Liquid Penetrant ExaminationE 709 Guide for Magnetic Particle Examination2.2 Manufacturers Standardization Society of the Valve andFitting
12、s 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 703/A
13、703M, including any supplementary require-ments that are indicated in the purchase order. Failure tocomply with the general requirements of Specification A 703/1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel, and Related Alloys and is the direct responsib
14、ility of SubcommitteeA01.18 on Castings.Current edition approved March 1, 2006. Published March 2006. Originallyapproved in 1952. Last previous edition approved in 2005 as A 351/A 351M 05.2For ASME Boiler and Pressure Vessel Code applications, see related Specifi-cation SA-351/SA-351M in Section II
15、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 Manufacturers Standardization So
16、ciety of the Valve and FittingsIndustry (MSS), 127 Park St., NE, Vienna, VA 22180-4602.1*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.A 703M constitutes nonconformanc
17、e with this specification. Incase of conflict between the requirements of this specificationand Specification A 703/A 703M, this specification shall pre-vail.3.2 Investment Castings Material furnished to this speci-fication shall conform to the requirements of SpecificationA 985/A 985M, including an
18、y supplementary requirementsthat are indicated in the purchase order. Failure to comply withthe general requirements of Specification A 985/A 985M con-stitutes nonconformance with this specification. In case ofconflict between the requirements of this specification andSpecification A 985/A 985M, Spe
19、cification A 985/A 985Mshall 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 inquiry and order should include or
20、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 thestandards of acceptance.5. Process5
21、.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 in water orrapid cool by other means
22、 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 temperatures, hold for someminimum
23、 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 Properties8.1 Steel used for the casti
24、ngs 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 visual acceptancestandards specified
25、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.9.2 When additional inspection is des
26、ired, 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 A 488/A 488M.10.2 Weld repairs shall be inspected to the sa
27、me 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 exceeds 20 % of the wall thickness
28、 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 Requirement S6 specified, weld repai
29、rs 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 order and such castings should be so
30、lution-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, CF3M,CF3MA, CF8M, CF3MN, CG3M, C
31、F10,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 then quenched in wateror rapidly
32、 cooled by other means.A 351/A 351M 062TABLE 2 Chemical RequirementsNOTECD4MCu and CD3MWCuN have been deleted from this specification and added to Specification A 995/A 995M. They may now be suppliedand purchased in compliance with Specification A 995/A 995M as grades 1B and 6A respectively.Element,
33、 %(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 0.10 0.10 0.20 0.20 0.35 0.45
34、Manganese 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 0.040 0.040 0.040 0.040 0.040 0
35、.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 8.012.08.011.09.013.09.012.09.013.09.012.08.011.09.012.012.015.012.015.012.015.019.022.019.022.019.022.0Mo
36、lybde- 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 . . . . . . . . . . . . 0.10 . . . . . . . .
37、 . . . . . . . . . . . . . . . . . . .0.20Copper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Element, %(max, ex-cept whererange isgiven)HT30N08030CF10MCCN7MN08007CN3MNJ94651CE8MNCG-6MMNJ93790CG8MJ93000CF10S-MnNJ92972CT15CN08151CK-3MCuNJ93254CE20NJ92802CG3MJ9299
38、9Carbon 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 0.010 0.040 0.030 0.04 0.03
39、0 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 33.037.013.016.027.530.523.525.58.011.011.5013.509.013.0
40、8.09.031.034.017.519.58.011.09.013.0Molybde- 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 . . . . . . . . . . . . . . . . . .0.30Nitrogen . . . . . .
41、 . . . 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 columbium content of not less
42、than 10 times the carbon content but not over 1.20 %.A 351/A 351M 063SUPPLEMENTARY 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 purchaser is included inSpecif
43、ication A 703/A 703M. Those which are ordinarily considered suitable for use with thisspecification are given below. Others enumerated in Specification A 703/A 703M may be used withthis specification upon agreement between the manufacturer and purchaser.S2. Destruction TestsS5. Radiographic Inspecti
44、onS6. Liquid Penetrant InspectionS10. Examination of Weld PreparationS10.1 The method of performing the magnetic particle orliquid penetrant test shall be in accordance with Practice E 165or Practice E 709.S11. Post Weld Heat TreatmentS11.1 All austenitic castings, except Grades HK, HT, andCT15C, wh
45、ich have been subjected to weld repairs, shall begiven a post-weld solution heat treatment.TABLE 3 Tensile RequirementsCF3J92700CF3AJ92700CF8J92600CF8AJ92600CF3MJ92800CF-3MAJ92800CF8MJ92900CF-3MNJ92804CF8CJ92710CF10J92950CF10MJ92901CH8J93400CH10J93401CH20J93402CK20J94202HK30J94203HK40J94204Tensile s
46、trength, 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 205 240 205 240 205 255 205 255 205 205 205 195 205 205 195 240 240Elongation in2
47、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
48、 485 425 550 655 585 515 585 435 550 550 515Yield strength,A28 30 25 38 65 42.5 35 42.5 25 38 40 35min, ksi MPa 195 205 170 260 450 295 240 295 170 260 275 240Elongation in2 in. or50 mm,Bmin, %15.0 20.0 35.0 35 25.0 30.0 25.0 30.0 20.0 35 30.0 25ADetermine by the 0.2 % offset method.BWhen ICI test b
49、ars are used in tensile testing as provided for in Specification A 985/A 985M, the gage length to reduced section diameter ratio shall be 4 to 1.A 351/A 351M 064SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue(A 351/A 351M 05) that may impact the use of this standard. (Appro
