1、Designation: A351/A351M 12bA351/A351M 13Standard 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, t
2、he 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 cover
3、s 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 Speci
4、fication A995/A995M.1.2 Anumber 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 b
5、e 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.1.3
6、 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 the purchaser in the purchase order or contract.1.4 The values stated in either SI units or inch-pound units are to be
7、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 thetwo systems may result in non-conformance with the standard.1.4.1 This specification is expressed in both inch-poun
8、d 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 text, the SI units areshown in brackets or parentheses.2. Referenced Documents2.1 ASTM Standards:3A216/A216M Specificat
9、ion for Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature ServiceA217/A217M Specification for Steel Castings, Martensitic Stainless and Alloy, for Pressure-Containing Parts, Suitable forHigh-Temperature ServiceA488/A488M Practice for Steel Castings, Welding, Qualifications of
10、 Procedures and PersonnelA703/A703M Specification for Steel Castings, General Requirements, for Pressure-Containing PartsA985/A985M Specification for Steel Investment Castings General Requirements, for Pressure-Containing PartsA995/A995M Specification for Castings, Austenitic-Ferritic (Duplex) Stain
11、less Steel, for Pressure-Containing PartsE165 Practice for Liquid Penetrant Examination for General IndustryE709 Guide for Magnetic Particle Testing2.2 Manufacturers Standardization Society of the Valve and Fittings Industry Standard:4SP-55 Quality Standard for Steel Castings for Valves, Flanges, an
12、d Fittings and Other Components (Visual Method)1 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.18on Castings.Current edition approved Nov. 1, 2012May 1, 2013. Published November 2012M
13、ay 2013. Originally approved in 1952. Last previous edition approved in 2012 asA351/A351M 12a.A351/A351M 12b. DOI: 10.1520/A0351_A0351M-12B.10.1520/A0351_A0351M-13.2 For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-351/SA-351M in Section II of that code.3 For refer
14、encedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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 Society of the Valve and
15、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 standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequ
16、ately 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 ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM I
17、nternational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13. General Conditions for Delivery3.1 Other than investment castings Material furnished to this specification shall conform to the requirements of SpecificationA703/A703M, including any supplementary re
18、quirements 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 specification and Specification A703/A703M, this specification shall
19、 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 comply with thegeneral requirements of Specification A985/A985M consti
20、tutes nonconformance with this specification. In case 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 casting
21、sother 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 A description of the casting by pattern number or drawing (dimensional tolerances shall be included on the castingdrawing),4.1.
22、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 made by the electric furnace process with or without separate refining such as argon-oxygendecarburization (AOD).6. Heat Treatment6
23、.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 2Proper heat treatment of these alloys is usually necessary to enhance corrosion resistance and in some cases to meet mechanical prop
24、erties.Minimum heat-treat temperatures are specified; 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 Composit
25、ion7.1 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 the requirements as to tensile properties prescribed in Table 3.9. Quality9.1 The surface of the casting shall be examined visuall
26、y 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 Method SP-55 or other visualstandards may be used to define acceptable surface discontinuities and finish. Unacceptable visual su
27、rface discontinuities shall beremoved and their removal verified by visual examination of the resultant cavities.TABLE 1 Heat-Treatment RequirementsGrade Temperature, minF CHK30, HK40, HT30, CT15C as-cast as-castHK30, HK40, HT30, CT15C, HG10MNN as-cast as-castCF3, CF3A, CF8, CF8A, CF3M,CF3MA, CF8M,
28、CF3MN, CG3M, CF10,CF10M, CG8M1900 1040CF10SMnN, CF8C, CF10MC 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 watero
29、r rapidly cooled by other means.A351/A351M 132TABLE 2 Chemical RequirementsNOTE 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 respe
30、ctively.Element, %(max, ex-cept whererange isgiven)CF3,CF3AJ92700CF8,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 0.1
31、0 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 0.040 0.04
32、0 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 8.012.08.011.09.013.09.012.09.013.09.012.08.011.09.012.012.015.012.015.012.015.019.02
33、2.019.022.019.022.0Molybde- 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34、 .Nitrogen . . . . . . . . . . . . 0.10 . . . . . . . . . . . . . . . . . . . . . . . . . . .0.20Copper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Element, %(max, ex-cept whererange isgiven)HT30N08030 CF10MCCN7MN08007 CN3MNJ94651CG-6MMNJ93790CG8MJ93000CF10S-Mn
35、NJ92972CT15CN08151CK-3MCuNJ93254CE20NJ92802CG3MJ92999Carbon 0.25 0.10 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.
36、040 0.040 0.010 0.030 0.04 0.030 0.03 0.010 0.040 0.04maxPhosphorus 0.040 0.040 0.040 0.040 0.040 0.04 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 33.037.013.016.027.530.523.525.511.5013.5
37、09.013.08.09.031.034.017.519.58.011.09.013.0Molybde- 0.50 1.75 2.0 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.
38、30Nitrogen . . . . . . . . . 0.18 0.20 . . . 0.08 . . . 0.18 0.08 . . .0.26 0.40 0.18 0.24 0.20Copper . . . . . . 3.04.00.75max. . . . . . . . . . . . 0.501.00. . . . . .TABLE 2 Chemical RequirementsNOTE 1CE8MN and CD3MWCuN have been deleted from this specification and added to Specification A995/A9
39、95M as Grades 2A and 6Arespectively. CD4MCu has also been removed. Specification A995/A995M Grade 1B, CD4MCuN, is an acceptable substitute.Element, %(max, ex-cept whererange isgiven)CF3,CF3AJ92700CF8,CF8AJ92600CF3M,CF3MAJ92800CF8MJ92900 CF3MNJ92804CF8CJ92710CF10J92950 CF10MJ92901CH8J93400CH10J93401C
40、H20J93402 CK20J94202 HG10MNNJ92604 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 0.07 0.25 0.350.10 0.10 0.10 0.20 0.20 0.11 0.35 0.45A351/A351M 1339.2 When additional inspection is desired, Supplementary Requirements S5, S6, and S10 may be ordered.9.3 The c
41、astings 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.10.2 Weld repairs shall be inspected to the same quality standards that are used to inspect the castings. When castings
42、areproduced with Supplementary 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 cavit
43、y prepared for welding is greater than approximately 10 in.2 65 cm2, shallTABLE 2 ContinuedElement, %(max, ex-cept whererange isgiven)CF3,CF3AJ92700CF8,CF8AJ92600CF3M,CF3MAJ92800CF8MJ92900 CF3MNJ92804CF8CJ92710CF10J92950 CF10MJ92901CH8J93400CH10J93401CH20J93402 CK20J94202 HG10MNNJ92604 HK30J94203 HK
44、40J94204Manganese 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 3.0 1.50 1.505.0Silicon 2.00 2.00 1.50 1.50 1.50 2.00 2.00 1.50 1.50 2.00 2.00 1.75 0.70 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 0.030 0.040 0.040Phosphorus 0.040 0.040 0.040
45、 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 18.5 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 20.5 27.0 27.0Nickel 8.012.08.011.09.013.09.012.09.013.09.012.08.011.09.012.012.015.0
46、12.015.012.015.019.022.011.513.519.022.019.022.0Molybde- 0.50 0.50 2.0 2.0 2.0 0.50 0.50 2.0 0.50 0.50 0.50 0.50 0.25 0.50 0.50num 3.0 3.0 3.0 3.0 0.45Columbium . . . . . . . . . . . . . . . A . . . . . . . . . . . . . . . . . . C . . . . . .(niobium)Vanadium . . . . . . . . . . . . . . . . . . . .
47、. . . . . . . . . . . . . . . . . . . . . . . . .Nitrogen . . . . . . . . . . . . 0.10 . . . . . . . . . . . . . . . . . . . . . 0.20 . . . . . .0.20 0.30Copper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.50 . . . . . .Element, %(max, ex-cept whererange isgiven)HT30N080
48、30 CF10MCCN7MN08007 CN3MNJ94651CG-6MMNJ93790CG8MJ93000CF10S-MnNJ92972CT15CN08151CK-3MCuNJ93254CE20NJ92802CG3MJ92999Carbon 0.25 0.10 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
49、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 0.04maxPhosphorus 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 33.037.013.016.027.530.523.525.511.5013.509.013.08.09.031.034.017.519.58.0
