1、Designation: A351/A351M 16A351/A351M 18Standard 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, th
2、e 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 U.S. Department of Defense.1. Scope*1.1 This specification2 c
3、overs 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 S
4、pecification 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 sha
5、ll 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、.800 F 425 C.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 the purchaser in the purchase order or contract.1.4 The values stated in either SI units or inch-pound
7、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 thetwo systems may result in non-conformance with the standard.1.4.1 This specification is expressed i
8、n both inch-pound units and in SI units; however, unless the purchase order or contractspecifies the applicable M specification M-specification designation (SI units), the inch-pound units shall apply. Within the text,the SI units are shown in brackets or parentheses.1.5 This international standard
9、was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Reference
10、d 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-Containing Parts, Suitable forHigh-Temperature ServiceA488/A488M Pra
11、ctice 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 Requirements, for Pressure-Containing PartsA995/A995M Specificat
12、ion for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts2.2 Manufacturers Standardization 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)1 This s
13、pecification 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 May 1, 2016May 1, 2018. Published May 2016May 2018. Originally approved in 1952. Last previous edition a
14、pproved in 20152016 asA351/A351M 15.A351/A351M 16. DOI: 10.1520/A0351_A0351M-16.10.1520/A0351_A0351M-18.2 For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-351/SA-351M in Section II of that code.3 For referencedASTM standards, visit theASTM website, www.astm.org, or
15、 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 Fittings Industry (MSS), 127 Park St., NE, Vienna, VA 22180-
16、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 adequately depict all changes accurately, ASTM recommends that us
17、ers 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 International, 100 Barr Harbor Drive, PO Box C700, West Consh
18、ohocken, PA 19428-2959. United States13. General Conditions for Delivery3.1 Other Than Investment CastingsOther than investment castings Material Material furnished to this specification shallconform to the requirements of Specification A703/A703M, including any supplementary requirements that are i
19、ndicated in thepurchase order. Failure to comply with the general requirements of Specification A703/A703M constitutes nonconformance withthis specification. In case of conflict between the requirements of this specification and Specification A703/A703M, thisspecification shall prevail.3.2 Investmen
20、t CastingsInvestment Castings Material Material furnished to this specification shall conform to therequirements of Specification A985/A985M, including any supplementary requirements that are indicated in the purchase order.Failure to comply with the general requirements of Specification A985/A985M
21、constitutes nonconformance with this specification.In case of conflict between the requirements of this specification and Specification A985/A985M, Specification A985/A985M shallprevail.3.3 The post weld post-weld heat treatment requirements of Supplementary Requirement S11S50 may be specified whena
22、ustenitic castings other 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 ca
23、stingdrawing),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 made by the electric furnace process with or without separate refining such as argon-oxygendecarburization (AOD).
24、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 2Proper heat treatment of these alloys is usually necessary to enhance corrosion resistance and, in some cases, to
25、meet mechanical properties.Minimum heat-treat temperatures are specified; however, it is sometimes necessary to heat-treat heat treat at higher temperatures, hold for some minimumtime at temperature, and then rapidly cool the castings in order to enhance the corrosion resistance and meet mechanical
26、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 the requirements as to tensile properties prescribed in Table 3.TABLE 1 Heat-Treatment Requirements
27、Grade Temperature, minF CHK30, HK40, HT30, CT15C, HG10MnN as-cast as-castCF3, CF3A, CF8, CF8A, CF3M,CF3MA, CF8M, CF3MN, CG3M, CF10,CF10M, CG8M1900 1040CF10SMnN, CF8C, CF10MC 1950 1065CN7M, CG6MMnN 2050 1120CH8, CH10, CH20, CK20 2100 1150CK3MCuN, CN3MNB 2200 1200CE20NA 2225 1220A Grade shall be quenc
28、hed in water or the castings may be furnace cooled to2050F 1120C2050 F 1120 C minimum, held for 15 min minimum, and thenquenched in water or rapidly cooled by other means.B Castings of these grades shall be held at the specified temperature for aminimum of 4 hours.h.A351/A351M 182TABLE 2 Chemical Re
29、quirementsNOTE 1CE8MN and CD3MWCuN have been deleted from this specification and added to Specification A995/A995M as Grades 2A and 6A, respectively. CD4MCu has also been removed.Specification A995/A995M Grade 1B, CD4MCuN, is an acceptable substitutesubstitute.Element, % (max, except where range is
30、given)Material Grade Carbon Manganese Silicon Sulfur Phosphorus Chromium Nickel Molybdenum Columbium(Niobium)DVanadium Nitrogen CopperCE20NJ928020.20 1.50 1.50 0.040 0.040 23.026.0 8.011.0 0.50 . . 0.080.20 .CF3, CF3AJ927000.03 1.50 2.00 0.040 0.040 17.021.0 8.012.0 0.50 . . . .CF8, CF8AJ926000.08 1
31、.50 2.00 0.040 0.040 18.021.0 8.011.0 0.50 . . . .CF3M,CF3MAJ928000.03 1.50 1.50 0.040 0.040 17.021.0 9.013.0 2.03.0 . . . .CF8MJ929000.08 1.50 1.50 0.040 0.040 18.021.0 9.012.0 2.03.0 . . . .CF3MNJ928040.03 1.50 1.50 0.040 0.040 17.021.0 9.013.0 2.03.0 . . 0.100.20 .CF8CJ927100.08 1.50 2.00 0.040 0
32、.040 18.021.0 9.012.0 0.50 A . . .CF10J929500.040.10 1.50 2.00 0.040 0.040 18.021.0 8.011.0 0.50 . . . .CF10MJ929010.040.10 1.50 1.50 0.040 0.040 18.021.0 9.012.0 2.03.0 . . . .CF10MC 0.10 1.50 1.50 0.040 0.040 15.018.0 13.016.0 1.752.25 B . . .CF10SMnNJ929720.10 7.009.00 3.504.50 0.030 0.060 16.018
33、.0 8.09.0 . . . 0.080.18 .CG3MJ929990.03 1.50 1.50 0.04 0.04 18.021.0 9.013.0 3.04.0 . . . .CG6MMnNJ937900.06 4.06.0 1.00 0.030 0.040 20.523.5 11.513.5 1.503.00 0.100.30 0.100.30 0.200.40 .CG8MJ930000.08 1.50 1.50 0.04 0.04 18.021.0 9.013.0 3.04.0 . . . .CH8J934000.08 1.50 1.50 0.040 0.040 22.026.0
34、12.015.0 0.50 . . . .CH10J934010.040.10 1.50 2.00 0.040 0.040 22.026.0 12.015.0 0.50 . . . .CH20J934020.040.20 1.50 2.00 0.040 0.040 22.026.0 12.015.0 0.50 . . . .A351/A351M183TABLE 2 ContinuedElement, % (max, except where range is given)Material Grade Carbon Manganese Silicon Sulfur Phosphorus Chro
35、mium Nickel Molybdenum Columbium(Niobium)DVanadium Nitrogen CopperCK20J942020.040.20 1.50 1.75 0.040 0.040 23.027.0 19.022.0 0.50 . . . .CK3MCuNJ932540.025 1.20 1.00 0.010 0.045 19.520.5 17.519.5 6.07.0 . . 0.180.24 0.501.00CN3MNJ946510.03 2.00 1.00 0.010 0.040 20.022.0 23.525.5 6.07.0 . . 0.180.26
36、0.75CN7MN080070.07 1.50 1.50 0.040 0.040 19.022.0 27.530.5 2.03.0 . . . 3.04.0CT15CN081510.050.15 0.151.50 0.501.50 0.03 0.03 19.021.0 31.034.0 . 0.501.50 . . .HG10MnNJ926040.070.11 3.05.0 0.70 0.030 0.040 18.520.5 11.513.5 0.250.45 C . 0.200.30 0.50HK30J942030.250.35 1.50 1.75 0.040 0.040 23.027.0
37、19.022.0 0.50 . . . .HK40J942040.350.45 1.50 1.75 0.040 0.040 23.027.0 19.022.0 0.50 . . . .HT30N080300.250.35 2.00 2.50 0.040 0.040 13.017.0 33.037.0 0.50 . . . .A Grade CF8C shall have a columbium (niobium) content of not less than 8 times the carbon content but not over 1.00 %.B Grade CF10MC shal
38、l have a columbium (niobium) content of not less than 10 times the carbon content but not over 1.20 %.C Grade HG10MnN shall have a columbium (niobium) content of not less than 8 times the carbon, but not over 1.00 %.D Columbium (Cb) and niobium (Nb) are alternate names for Element 41.A351/A351M184TA
39、BLE 3 Tensile RequirementsMaterial Grade Tensile strength,min, ksi MPaYield strength,Amin, ksi MPaElongation in 2 in. or50 mm,B min, %CE20N 80 40 30J92802 550 275CF3 70 30 35J92700 485 205CF3A 77 35 35J92700 530 240CF8 70 30 35J92600 485 205CF8A 77 35 35J92600 530 240CF3M 70 30 30J92800 485 205CF3MA
40、 80 37 30J92800 550 255CF8M 70 30 30J92900 485 205CF3MN 75 37 35J92804 515 255CF8C 70 30 30J92710 485 205CF10 70 30 35J92950 485 205CF10M 70 30 30J92901 485 205CF10MC 70 30 20485 205CF10SMnN 85 42.5 30J92972 585 295CG3M 75 35 25J92999 515 240CG6MMnN 85 42.5 30J93790 585 295CG8M 75 35 25J93000 515 24
41、0CH8 65 28 30J93400 450 195CH10 70 30 30J93401 485 205CH20 70 30 30J93402 485 205CK20 65 28 30J94202 450 195CK3MCuN 80 38 35J93254 550 260CN3MN 80 38 35J94651 550 260CN7M 62 25 35N08007 425 170CT15C 63 25 20N08151 435 170A351/A351M 1859. Quality9.1 The surface of the casting shall be examined visual
42、ly 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 s
43、urface discontinuities shall beremoved and their removal verified by visual examination of the resultant cavities.9.2 When additional 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. Repai
44、r 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 Supplementary Requirement S5 specified, weld repairs on cas
45、tings 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 welding is greater than approximately 10 in.2 65 cm2, shallbe
46、 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 used toinspect the castings.10.3 For Grade HG10MnN, the fil
47、ler metal to be used shall be established by mutual agreement between the manufacturer andthe purchaser.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-he
48、at solution heat treated following all weld repairs.11. Keywords11.1 austenitic stainless steel; pressure containing parts; stainless steel; steel castingsSUPPLEMENTARY REQUIREMENTSThe following supplementary requirements shall not apply unless specified in the purchase order.Alist of standardized s
49、upplementary 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. Others enumerated in Specifications A703/A703M andA985/A985M may be used with this specification upon agreement between the manufa
