1、Designation: A351/A351M 12a A351/A351M 12bStandard 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,
2、 the year of last 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 specification2 cov
3、ers austenitic steel castings for valves, flanges, fittings, and other pressure-containing parts (Note 1).NOTE 1Carbon steel castings for pressure-containing parts are covered by Specification A216/A216M, low-alloy steel castings by SpecificationA217/A217M, and duplex stainless steel castings by Spe
4、cification A995/A995M.1.2 A number of grades of austenitic steel castings are included in this specification. Since these grades possess varying degreesof suitability for service at high temperatures or in corrosive environments, it is the responsibility of the purchaser to determinewhich grade shal
5、l be furnished. Selection will depend on design and service conditions, mechanical properties, andhigh-temperature or corrosion-resistant characteristics, or both.1.2.1 Because of thermal instability, Grades CE20N, CF3A, CF3MA, and CF8A are not recommended for service attemperatures above 800F 425C.
6、1.2.2 Because of embrittlement phases, Grade CD4MCu is not recommended for service at temperatures above 600F 316C.1.3 Supplementary requirements of an optional nature are provided for use at the option of the purchaser. The Supplementaryrequirements shall apply only when specified individually by t
7、he purchaser in the purchase order or contract.1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from
8、thetwo systems may result in non-conformance with the standard.1.4.1 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contractspecifies the applicable M specification designation (SI units), the inch-pound units shall apply. Within the t
9、ext, the SI units areshown in brackets or parentheses.2. Referenced Documents2.1 ASTM Standards:3A216/A216M Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature ServiceA217/A217M Specification for Steel Castings, Martensitic Stainless and Alloy, for Pressure-Co
10、ntaining Parts, Suitable forHigh-Temperature ServiceA488/A488M Practice for Steel Castings, Welding, Qualifications of Procedures and PersonnelA703/A703M Specification for Steel Castings, General Requirements, for Pressure-Containing PartsA985/A985M Specification for Steel Investment Castings Genera
11、l Requirements, for Pressure-Containing PartsA995/A995M Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing PartsE165 Practice for Liquid Penetrant Examination for General IndustryE709 Guide for Magnetic Particle Testing2.2 Manufacturers Standardization
12、Society of the Valve and Fittings Industry Standard:4SP-55 Quality Standard for Steel Castings for Valves, Flanges, and Fittings and Other Components (Visual Method)3. General Conditions for Delivery3.1 Other than investment castings Material furnished to this specification shall conform to the requ
13、irements of SpecificationA703/A703M, including any supplementary requirements that are indicated in the purchase order. Failure to comply with thegeneral requirements of Specification A703/A703M constitutes nonconformance with this specification. In case of conflict betweenthe requirements of this s
14、pecification and Specification A703/A703M, this specification shall prevail.3.2 Investment Castings Material furnished to this specification shall conform to the requirements of SpecificationA985/A985M, including any supplementary requirements that are indicated in the purchase order. Failure to com
15、ply with the*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 States1general requirements of Specification A985/A985M constitutes nonconformance with this specification. In case
16、of conflict betweenthe requirements of this specification and Specification A985/A985M, Specification A985/A985M shall prevail.3.3 The post weld heat treatment requirements of Supplementary Requirement S11 may be specified when austenitic castingsother than HK, HT, or CT15C are to be subjected to se
17、vere corrosive service.4. Ordering Information4.1 The inquiry and order should include or indicate the following:4.1.1 A description of the casting by pattern number or drawing (dimensional tolerances shall be included on the castingdrawing),4.1.2 Grade of steel,4.1.3 Options in the specification, a
18、nd4.1.4 Supplementary requirements desired, including the standards of acceptance.5. Process5.1 The steel shall be made by the electric furnace process with or without separate refining such as argon-oxygendecarburization (AOD).6. Heat Treatment6.1 All castings shall receive a heat treatment at the
19、temperature specified in Table 1, followed by a quench in water or rapidcool by other means except as noted.NOTE 2Proper heat treatment of these alloys is usually necessary to enhance corrosion resistance and in some cases to meet mechanical properties.Minimum heat-treat temperatures are specified;
20、however, it is sometimes necessary to heat-treat at higher temperatures, hold for some minimum time attemperature, and then rapidly cool the castings in order to enhance the corrosion resistance and meet mechanical properties.7. Chemical Composition7.1 The steel shall conform to the requirements as
21、to chemical composition prescribed in Table 2.8. Tensile Properties8.1 Steel used for the castings shall conform to the requirements as to tensile properties prescribed in Table 3.9. Quality9.1 The surface of the casting shall be examined visually and shall be free of adhering sand, scale, cracks, a
22、nd hot tears. Othersurface discontinuities shall meet the visual acceptance standards specified in the order. Visual Method SP-55 or other visualstandards may be used to define acceptable surface discontinuities and finish. Unacceptable visual surface discontinuities shall beremoved and their remova
23、l verified by visual examination of the resultant cavities.1 This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.18on Castings.Current edition approved Sept. 1, 2012Nov. 1, 2012. Publishe
24、d October 2012November 2012. Originally approved in 1952. Last previous edition approved in 2012 asA351/A351M 12.A351/A351M 12a. DOI: 10.1520/A0351_A0351M-12A.10.1520/A0351_A0351M-12B.2 For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-351/SA-351M in Section II of t
25、hat code.3 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.4 Available from Manufacturers Standardization So
26、ciety of the Valve and Fittings Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-.TABLE 1 Heat-Treatment RequirementsGrade Temperature, minF CHK30, HK40, HT30, CT15C as-cast as-castCF3, CF3A, CF8, CF8A, CF3M,CF3MA, CF8M, CF3MN, CG3M, CF10,CF10M, CG8M1900 1040CF10SMnN, CF8C, CF1
27、0MC 1950 1065CN7M, CG6MMN 2050 1120CK3MCuN, CN3MN, CH8, CH10, CH20,CK202100 1150CE20NA 2225 1220A Grade 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 cooled by other means.A351/A351M 12b29.2 When a
28、dditional inspection is desired, Supplementary Requirements S5, S6, and S10 may be ordered.9.3 The castings shall not be peened, plugged, or impregnated to stop leaks.10. Repair by Welding10.1 Repairs shall be made using procedures and welders qualified under Practice A488/A488M.TABLE 2 Chemical Req
29、uirementsNOTE 1CE8MN, CD4MCu and CD3MWCuN have been deleted from this specification and added to Specification A995/A995M. They may nowbe supplied and purchased in compliance with Specification A995/A995M as grades 2A, 1B and 6A respectively.Element, %(max, ex-cept whererange isgiven)CF3,CF3AJ92700C
30、F8,CF8AJ92600CF3M,CF3MAJ92800CF8MJ92900 CF3MNJ92804CF8CJ92710CF10J92950 CF10MJ92901CH8J93400CH10J93401CH20J93402 CK20J94202 HK30J94203 HK40J94204Carbon 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 0.45Manganese 1.50 1.50 1.50 1.50 1.50 1.50 1.50
31、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 0.040 0.040 0.040 0.040 0.040 0.040 0.040Chrom
32、ium 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 8.012.08.011.09.013.09.012.09.013.09.012.08.011.09.012.012.015.012.015.012.015.019.022.019.022.019.022.0Molybde- 0.50 0.50 2.0 2.0 2.0 0.50 0.50 2.0 0.
33、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 . . . . . . . . . . . . .
34、. . . . . . . . . . . . . .0.20Copper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Element, %(max, ex-cept whererange isgiven)HT30N08030 CF10MCCN7MN08007 CN3MNJ94651CG-6MMNJ93790CG8MJ93000CF10S-MnNJ92972CT15CN08151CK-3MCuNJ93254CE20NJ92802CG3MJ92999Carbon 0.25 0
35、.10 0.07 0.03 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 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 1.00 1.50 3.50 0.50 1.00 1.50 1.50max 4.50 1.50Sulfur 0.040 0.040 0.040 0.010 0.030 0.04 0.030 0.03 0.010 0.040 0.04maxPhosphoru
36、s 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 20.50 18.0 16.0 19.0 19.5 23.0 18.017.0 18.0 22.0 22.0 23.50 21.0 18.0 21.0 20.5 26.0 21.0Nickel 33.037.013.016.027.530.523.525.511.5013.509.013.08.09.031.034.017.519.58.011.09.013.0Molybde- 0.50 1.75 2.0
37、 6.0 1.50 3.0 . . . . . . 6.0 0.50 3.0num 2.25 3.0 7.0 3.00 4.0 7.0 4.0Columbium . . . B . . . . . . 0.10 . . . . . . 0.50 . . . . . . . . .(niobium) 0.30 1.50Vanadium . . . . . . . . . . . . 0.10 . . . . . . . . . . . . . . . . . .0.30Nitrogen . . . . . . . . . 0.18 0.20 . . . 0.08 . . . 0.18 0.08
38、. . .0.26 0.40 0.18 0.24 0.20Copper . . . . . . 3.04.00.75max. . . . . . . . . . . . 0.501.00. . . . . .A Grade CF8C shall have a columbium content of not less than 8 times the carbon content but not over 1.00 %.B Grade CF10MC shall have a columbium content of not less than 10 times the carbon conte
39、nt but not over 1.20 %.A351/A351M 12b310.2 Weld repairs shall be inspected to the same quality standards that are used to inspect the castings. When castings areproduced with Supplementary Requirement S5 specified, weld repairs on castings that have leaked on hydrostatic test, or oncastings in which
40、 the depth of any cavity prepared for repair welding exceeds 20 % of the wall thickness or 1 in. 25 mm,whichever is smaller, or on castings in which any cavity prepared for welding is greater than approximately 10 in.2 65 cm2, shallbe radiographed to the same standards that are used to inspect the c
41、astings. When castings are produced with SupplementaryRequirement S6 specified, weld repairs shall be inspected by liquid penetrant examination to the same standards that are used toinspect the castings.NOTE 3When austenitic steel castings are to be used in services where they will be subject to str
42、ess corrosion, the purchaser should so indicate inhis order and such castings should be solution-heat treated following all weld repairs.11. Keywords11.1 austenitic stainless steel; pressure containing parts; stainless steel; steel castingsSUPPLEMENTARY REQUIREMENTSThe following supplementary requir
43、ements shall not apply unless specified in the purchase order. Alist of standardized supplementary requirements for use at the option of the purchaser is included inSpecifications A703/A703M and A985/A985M. Those which are ordinarily considered suitable foruse with this specification are given below
44、. Others enumerated in Specifications A703/A703M andA985/A985M may be used with this specification upon agreement between the manufacturer andpurchaser.TABLE 3 Tensile RequirementsCF3J92700CF3AJ92700CF8J92600CF8AJ92600CF3MJ92800CF-3MAJ92800CF8MJ92900CF-3MNJ92804CF8CJ92710CF10J92950CF10MJ92901CH8J934
45、00CH10J93401CH20J93402CK20J94202HK30J94203HK40J94204Tensile 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,A 30 35 30 35 30 37 30 37 30 30 30 28 30 30 28 35 35min, ksi MPa 205 240 205 240 205
46、255 205 255 205 205 205 195 205 205 195 240 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-3MNJ94651CG6MMNJ93790CG8MJ93000CF10S-MnNJ92972CT15CN08151CK-3MCuNJ93254CE20NJ92802CG3MJ92999Tensile stren
47、gth, 65 70 62 80 85 75 85 63 80 80 75min, ksi MPa 450 485 425 550 585 515 585 435 550 550 515Yield strength,A 28 30 25 38 42.5 35 42.5 25 38 40 35min, ksi MPa 195 205 170 260 295 240 295 170 260 275 240Elongation in2 in. or50 mm,Bmin, %15.0 20.0 35.0 35 30.0 25.0 30.0 20.0 35 30.0 25A Determine by t
48、he 0.2 % offset method.B When ICI test bars are used in tensile testing as provided for in Specification A985/A985M, the gage length to reduced section diameter ratio shall be 4 to 1.A351/A351M 12b4S2. Destruction TestsS5. Radiographic InspectionS6. Liquid Penetrant InspectionS10. Examination of Wel
49、d PreparationS10.1 The method of performing the magnetic particle or liquid penetrant test shall be in accordance with Practice E165 orPractice E709.S11. Post Weld Heat TreatmentS11.1 All austenitic castings, except Grades HK, HT, and CT15C, which have been subjected to weld repairs, shall be givena post-weld solution heat treatment.S33. St
