1、Designation: A351/A351M 12 A351/A351M 12aStandard 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 cove
3、rs 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 Spec
4、ification 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 shall
5、 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.1
6、.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 th
7、e 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 t
8、hetwo 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 te
9、xt, 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-Con
10、taining 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 General
11、 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 S
12、ociety of the Valve and Fittings Industry Standard:4SP-55 Quality Standard for Steel Castings for Valves, Flanges, and Fittings and Other Components (Visual Method)1 This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct resp
13、onsibility of Subcommittee A01.18on Castings.Current edition approved March 1, 2012Sept. 1, 2012. Published April 2012October 2012. Originally approved in 1952. Last previous edition approved in 20102012 asA351/A351M 10.A351/A351M 12. DOI: 10.1520/A0351_A0351M-12.10.1520/A0351_A0351M-12A.2 For ASME
14、Boiler and Pressure Vessel Code applications, see related Specification SA-351/SA-351M in Section II of that 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
15、the standards Document Summary page on the ASTM website.4 Available from Manufacturers Standardization Society of the Valve and Fittings Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-.This document is not an ASTM standard and is intended only to provide the user of an ASTM s
16、tandard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by
17、ASTM is to be considered the official document.*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 States13. General Conditions for Delivery3.1 Other than investment castings Mater
18、ial furnished to this specification shall conform to the requirements 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 specifi
19、cation. In case of conflict betweenthe requirements of this specification 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 requirem
20、ents that are indicated in the purchase order. Failure to comply with thegeneral requirements of Specification A985/A985M constitutes nonconformance with this specification. In case of conflict betweenthe requirements of this specification and Specification A985/A985M, Specification A985/A985M shall
21、 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 severe corrosive service.4. Ordering Information4.1 The inquiry and order should include or indicate the following:4.1.1
22、 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, and4.1.4 Supplementary requirements desired, including the standards of acceptance.5. Process5.1 The steel shall be mad
23、e 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 temperature specified in Table 1, followed by a quench in water or rapidcool by other means except as noted.NOTE 2Prop
24、er 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; however, it is sometimes necessary to heat-treat at higher temperatures, hold for some minimum time attemperature, and
25、 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 to chemical composition prescribed in Table 2.8. Tensile Properties8.1 Steel used for the castings shall conform to th
26、e 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, and hot tears. Othersurface discontinuities shall meet the visual acceptance standards specified in the order. Visual M
27、ethod SP-55 or other visualstandards may be used to define acceptable surface discontinuities and finish. Unacceptable visual surface discontinuities shall beremoved and their removal verified by visual examination of the resultant cavities.TABLE 1 Heat-Treatment RequirementsGrade Temperature, minF
28、CHK30, HK40, HT30, CT15C as-cast as-castCF3, CF3A, CF8, CF8A, CF3M,CF3MA, CF8M, CF3MN, CG3M, CF10,CF10M, CG8M1900 1040CF10SMnN, CF8C, CF10MC 1950 1065CN7M, CG6MMN, CE8MN 2050 1120CN7M, CG6MMN 2050 1120CK3MCuN, CN3MN, CH8, CH10, CH20,CK202100 1150CE20NA 2225 1220A Grade shall be quenched in water or
29、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 12a2TABLE 2 Chemical RequirementsNOTE 1CE8MN, CD4MCu and CD3MWCuN have been deleted from this specification and added to Specification A995/A995M. T
30、hey 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,CF3AJ92700CF8,CF8AJ92600CF3M,CF3MAJ92800CF8MJ92900 CF3MNJ92804CF8CJ92710CF10J92950 CF10MJ92901CH8J93400CH10J93401CH20J93402 CK20J94202
31、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 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
32、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 0.040Chromium 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 2
33、6.0 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 0.50 0.50 0.50 0.50 0.50 0.50num 3.0 3.0 3.0 3.0Columbium . . . . . . . . . . . . . . . A . . . . . . . . . . . . . . . . . .
34、. . . . . .(niobium)Vanadium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Nitrogen . . . . . . . . . . . . 0.10 . . . . . . . . . . . . . . . . . . . . . . . . . . .0.20Copper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Ele
35、ment, %(max, ex-cept whererange isgiven)HT30N08030CF10MCCN7MN08007CN3MNJ94651 CE8MNCG-6MMNJ93790CG8MJ93000CF10S-MnNJ92972CT15CN08151CK-3MCuNJ93254CE20NJ92802CG3MJ92999Carbon 0.25 0.10 0.07 0.03 0.08 0.06 0.08 0.10 0.05 0.025 0.20 0.03Carbon 0.25 0.10 0.07 0.03 0.06 0.08 0.10 0.05 0.025 0.20 0.030.35
36、 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 1.50Manganese 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 1.50max 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 1.50Silicon 2.50 1.50 1.50 1.00 1.00 1.50 3.50 0.50 1.00 1.
37、50 1.50max 4.50 1.50Sulfur 0.040 0.040 0.040 0.010 0.040 0.030 0.04 0.030 0.03 0.010 0.040 0.04Sulfur 0.040 0.040 0.040 0.010 0.030 0.04 0.030 0.03 0.010 0.040 0.04maxmaxPhosphorus 0.040 0.040 0.040 0.040 0.040 0.040 0.04 0.060 0.03 0.045 0.040 0.04Phosphorus 0.040 0.040 0.040 0.040 0.040 0.04 0.060
38、 0.03 0.045 0.040 0.04maxmaxChromium 13.0 15.0 19.0 20.0 22.5 20.5018.0 16.0 19.0 19.5 23.0 18.0Chromium 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 25.5 23.50 21.0 18.0 21.0 20.5 26.0 21.017.0 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
39、.530.523.525.58.011.011.5013.509.013.08.09.031.034.017.519.58.011.09.013.0Nickel 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 6.0 3.0 1.50 3.0 . . . . . . 6.0 0.50 3.0Molybde- 0.50 1.75 2.0 6.0 1.50 3.0 . . . . . . 6.0 0.50 3.0num 2.25 3
40、.0 7.0 4.5 3.00 4.0 7.0 4.0num 2.25 3.0 7.0 3.00 4.0 7.0 4.0Columbium . . . B . . . . . . . . . 0.10 . . . . . . 0.50 . . . . . . . . .Columbium . . . B . . . . . . 0.10 . . . . . . 0.50 . . . . . . . . .(niobium) 0.30 1.50Vanadium . . . . . . . . . . . . . . . 0.10 . . . . . . . . . . . . . . . . .
41、 .Vanadium . . . . . . . . . . . . 0.10 . . . . . . . . . . . . . . . . . .0.300.30Nitrogen . . . . . . . . . 0.18 0.10 0.20 . . . 0.08 . . . 0.18 0.08 . . .A351/A351M 12a39.2 When additional inspection is desired, Supplementary Requirements S5, S6, and S10 may be ordered.9.3 The castings shall not
42、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.10.2 Weld repairs shall be inspected to the same quality standards that are used to inspect the castings. When castings areproduced with S
43、upplementary Requirement S5 specified, weld repairs on castings that have leaked on hydrostatic test, or oncastings in which 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 wel
44、ding is greater than approximately 10 in.2 65 cm2, shallbe radiographed to the same standards that are used to inspect the castings. When castings are produced with SupplementaryRequirement S6 specified, weld repairs shall be inspected by liquid penetrant examination to the same standards that are u
45、sed toinspect the castings.NOTE 3When austenitic steel castings are to be used in services where they will be subject to stress 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 s
46、teel; pressure containing parts; stainless steel; steel castingsTABLE 2 ContinuedElement, %(max, ex-cept whererange isgiven)HT30N08030CF10MCCN7MN08007CN3MNJ94651 CE8MNCG-6MMNJ93790CG8MJ93000CF10S-MnNJ92972CT15CN08151CK-3MCuNJ93254CE20NJ92802CG3MJ92999Nitrogen . . . . . . . . . 0.18 0.20 . . . 0.08 .
47、 . . 0.18 0.08 . . .0.26 0.30 0.40 0.18 0.24 0.200.26 0.40 0.18 0.24 0.20Copper . . . . . . 3.04.00.75max. . . . . . . . . . . . . . . 0.501.00. . . . . .Copper . . . . . . 3.04.00.75max. . . . . . . . . . . . 0.501.00. . . . . .A Grade CF8C shall have a columbium content of not less than 8 times th
48、e carbon content but not over 1.00 %.B Grade CF10MC shall have a columbium content of not less than 10 times the carbon content but not over 1.20 %.TABLE 3 Tensile RequirementsCF3J92700CF3AJ92700CF8J92600CF8AJ92600CF3MJ92800CF-3MAJ92800CF8MJ92900CF-3MNJ92804CF8CJ92710CF10J92950CF10MJ92901CH8J93400CH
49、10J93401CH20J93402CK20J94202HK30J94203HK40J94204Tensile 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 205 240 205 240 205 255 205 255 205 205 205 195 205 205 195 240 240
