1、Designation: A890/A890M 13A890/A890M 18Standard Specification forCastings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic) for GeneralApplication1This standard is issued under the fixed designation A890/A890M; the number immediately following the designation indicat
2、es the yearof original adoption or, in the case of revision, 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.1. Scope*1.1 This specification covers a group of cast du
3、plex stainless steels (austenitic/ferritic).1.2 The duplex stainless steel alloys offer a combination of enhanced mechanical properties and corrosion resistance whenproperly balanced in composition and properly heat treated. Ferrite levels are not specified, but these alloys will develop a rangeof a
4、pproximately 30 to 60 % ferrite with the balance austenite. It is the responsibility of the purchaser to determine which gradeshall be furnished depending on design and service conditions, mechanical properties, and corrosion-resistant characteristics.NOTE 1Because of the possibility of precipitatio
5、n of embrittling phases, the grades included in this specification are not recommended for serviceat temperatures above 600F 315C.600 F 315 C.1.3 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 equiv
6、alents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformancenonconformance with the standard.1.3.1 Within the text, the SI units are shown in brackets.1.4 This international standard was developed in accordance with inter
7、nationally 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. Referenced Documents2.1 ASTM Standards:2A370 Te
8、st Methods and Definitions for Mechanical Testing of Steel ProductsA732/A732M Specification for Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloyfor High Strength at Elevated TemperaturesA781/A781M Specification for Castings, Steel and Alloy, Common Requireme
9、nts, for General Industrial UseE29A957/A957M Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsSpecificationfor Investment Castings, Steel and Alloy, Common Requirements, for General Industrial UseE562 Test Method for Determining Volume Fraction by System
10、atic Manual Point CountE1245 Practice for Determining the Inclusion or Second-Phase Constituent Content of Metals by Automatic Image Analysis3. Ordering Information3.1 Orders for material to this specification shall include the following, as required, to describe the material adequately:3.1.1 Descri
11、ption of casting by pattern or drawing number (dimensional tolerance shall be included on the casting drawing),3.1.2 Specification designation and grade, including year of issue,3.1.3 Options in the specification (See(see 9.1), and3.1.4 Supplementary requirements desired, including the standards of
12、acceptance.1 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloysand is the direct responsibility of Subcommittee A01.18on Castings.Current edition approved Dec. 1, 2013May 1, 2018. Published December 2013May 2018. Originally approved in 1988.
13、 Last previous edition approved in 20122013 asA890/A890M 12a.A890/A890M 13. DOI: 10.1520/A0890_A0890M-13.10.1520/A0890_A0890M-18.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume informatio
14、n, refer to the standards Document Summary page on the ASTM website.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
15、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 International,
16、 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14. Process4.1 The steel shall be made by the electric furnace process, with or without separate refining such as argon-oxygen-decarburization (AOD).5. Heat Treatment5.1 Castings shall be heat treated in accordance w
17、ith the requirements in Table 1.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; however, it is sometimes necessary to heat-treat heat treat at higher temp
18、eratures, hold for some minimumtime at temperature, and then rapidly cool the castings in order to enhance the corrosion resistance and meet mechanical properties.6. Chemical Composition6.1 The steel shall conform to the requirements as to chemical composition prescribed in Table 2.7. General Requir
19、ements7.1 Material furnished to this specification shall conform to the requirements of Specification A781/A781M, including anysupplementary requirements that are indicated in the purchase order. Failure to comply with the general requirements ofTABLE 1 Heat Treatment RequirementsGrade Heat Treatmen
20、t1B, 1C Heat to 1900F 1040C minimum, hold for sufficient time toheat casting uniformly to temperature, quench in water or rapidcool by other means.1B, 1C Heat to 1900 F 1040 C minimum, hold for sufficient time toheat casting uniformly to temperature, quench in water or rapidcool by other means.2A He
21、at to 2050F 1120C minimum, hold for sufficient time toheat casting uniformly to temperature, quench in water or rapidcool by other means.2A Heat to 2050 F 1120 C minimum, hold for sufficient time toheat casting uniformly to temperature, quench in water or rapidcool by other means.3A Heat to 1950F 10
22、70C minimum, hold for sufficient time toheat casting uniformly to temperature, quench in water or rapidcool by other means.3A Heat to 1950 F 1070 C minimum, hold for sufficient time toheat casting uniformly to temperature, quench in water or rapidcool by other means.4A Heat to 2050F 1120C minimum fo
23、r sufficient time to heatcasting uniformly to temperature and water quench, or thecasting may be furnace cooled to 1850F 1010C minimum,hold for 15 min minimum and then water quench. A rapid coolby other means may be employed in lieu of water quench.4A Heat to 2050 F 1120 C minimum, hold for sufficie
24、nt time toheat casting uniformly to temperature, and water quench, or thecasting may be furnace cooled to a temperature no lower than1850 F 1010 C, hold for 15 min minimum and then waterquench. A rapid cool by other means may be employed in lieu ofwater quench.5A Heat to 2050F 1120C minimum, hold fo
25、r sufficient time toheat casting to temperature, furnace cool to 1910F 1045Cminimum, quench in water or rapid cool by other means.5A Heat to 2050 F 1120 C minimum, hold for sufficient time toheat casting to temperature, furnace cool to a temperature nolower than 1910 F 1045 C, then quench in water o
26、r rapid coolby other means.6A Heat to 2010F 1100C minimum, hold for sufficient time toheat casting uniformly to temperature, quench in water or coolrapidly by other means.6A Heat to 2010 F 1100 C minimum, hold for sufficient time toheat casting uniformly to temperature, quench in water or coolrapidl
27、y by other means.7A Heat to 2065F 1130C minimum, hold for sufficient time toheat casting to temperature, furnace cool to 1940F 1060Cminimum, quench in water or rapid cool by other means.7A Heat to 2065 F 1130 C minimum, hold for sufficient time toheat casting to temperature, furnace cool to a temper
28、ature nolower than 1940 F 1060 C, then quench in water or rapid coolby other means.A890/A890M 182TABLE 2 Chemical RequirementsGrade 1BA 1CB 2AType 25Cr-5Ni-M0-Cu-N 25Cr-6Ni-Mo-Cu-N 24Cr-10Ni-Mo-NUNS J93372 J93373 J93345ACI CD4MCuN CD3MCuN CE8MNComposition:Carbon, max 0.04 0.030 0.08Manganese, max 1.
29、0 1.20 1.00Silicon, max 1.0 1.10 1.50Phosphorus, max 0.04 0.030 0.04Sulfur, max 0.04 0.030 0.04Chromium 24.526.5 24.0-26.7 22.525.5Nickel 4.76.0 5.6-6.7 8.011.0Molybdenum 1.72.3 2.9-3.8 3.04.5Copper 2.73.3 1.40-1.90 . . .Tungsten . . . . . . . . .Nitrogen 0.100.25 0.22-0.33 0.100.30Grade 3A 4A5AB6AB
30、7ACType 25Cr-5Ni-Mo-N22Cr-5Ni-Mo-N25Cr-7Ni-Mo-N25Cr-7Ni-Mo-N27Cr-7Ni-Mo-W-NUNS J93371 J92205 J93404 J93380 J93379ACI CD6MN CD3MN CE3MN CD3MWCuN CD3MWNComposition:Carbon, max 0.06 0.03 0.03 0.03 0.030Manganese, max 1.00 1.50 1.50 1.00 1.00-3.00Silicon, max 1.00 1.00 1.00 1.00 1.00Phosphorus, max 0.04
31、0 0.04 0.04 0.030 0.030Sulfur, max 0.040 0.020 0.04 0.025 0.020Chromium 24.027.0 21.023.5 24.026.0 24.026.0 26.028.0Nickel 4.06.0 4.56.5 6.08.0 6.58.5 6.08.0Molybdenum 1.752.5 2.53.5 4.05.0 3.04.0 2.03.5Copper . . . 1.00, max . . . 0.51.0 1.00, maxTungsten . . . . . . . . . 0.51.0 3.04.0Nitrogen 0.1
32、50.25 0.100.30 0.100.30 0.200.30 0.300.40Boron . . . . . . . . . . . . 0.0010-0.0100Barium . . . . . . . . . . . . 0.0002-0.0100Ce +La . . . . . . . . . . . . 0.0050.030TABLE 2 Chemical RequirementsA,BMaterial GradeTypeUNSElement, %Carbon Manganese Phosphorus Sulfur Silicon Chromium Nickel Molybdenu
33、m Nitrogen Copper Tungsten OtherCD4MCuN (1B)C25Cr-5Ni-M0-Cu-NJ933720.04 1.0 0.04 0.04 1.0 24.526.5 4.76.0 1.72.3 0.100.25 2.73.3 . . . . . .CD3MCuN (1C)D25Cr-6Ni-Mo-Cu-NJ933730.030 1.20 0.030 0.030 1.10 24.026.7 5.66.7 2.93.8 0.220.33 1.401.90 . . . . . .A890/A890M183CE8MN (2A)24Cr-10Ni-Mo-NJ933450.
34、08 1.00 0.04 0.04 1.50 22.525.5 8.011.0 3.04.5 0.100.30 . . . . . . . . .CD6MN (3A)25Cr-5Ni-Mo-NJ933710.06 1.00 0.040 0.040 1.00 24.027.0 4.06.0 1.752.5 0.150.25 . . . . . . . . .CD3MN (4A)22Cr-5Ni-Mo-NJ922050.03 1.50 0.04 0.020 1.00 21.023.5 4.56.5 2.53.5 0.100.30 1.00 . . . . . .CE3MN (5A)D25Cr-7N
35、i-Mo-NJ934040.03 1.50 0.04 0.04 1.00 24.026.0 6.08.0 4.05.0 0.100.30 . . . . . . . . .CD3MWCuN (6A)E25Cr-7Ni-Mo-NJ933800.03 1.00 0.030 0.025 1.00 24.026.0 6.58.5 3.04.0 0.200.30 0.51.0 0.51.0 . . .CD3MWN (7A)F27Cr-7Ni-Mo-W-NJ933790.030 1.003.00 0.030 0.020 1.00 26.028.0 6.08.0 2.03.5 0.300.40 1.00 3
36、.04.0B: 0.00100.0100Ba: 0.00020.0100Ce + La:0.0050.030A All values are maximums, except where a range is provided.B Where ellipses () appear in this table, there is no requirement, and the element need not be analyzed for or reported.C CD4MCu CD4MCu has been removed from thethis standard. CD4MCuN is
37、 an acceptable substitute for CD4MCu.D % Cr + 3.3 % Mo + 16 % N $ 40. %Cr + 3.3 %Mo + 16 %N $ 40.E %Cr+3.3(%Mo+0.5%W)+16%N $ 45. %Cr + 3.3 (%Mo + (0.5 %W) + 16 %N $ 40.F %Cr + 3.3 (%Mo + (0.5 %W) + 16 %N $ 45.A890/A890M184Specification A781/A781M constitutes nonconformance with this specification. I
38、n case of conflict between the requirements of thisspecification and Specification A781/A781M, this specification shall prevail.7.2 Steel investment castings furnished to this specification shall conform to the requirements of Specification A957/A957M,including any supplementary requirements that ar
39、e indicated in the purchase order. Failure to comply with the general requirementsof Specification A957/A957M constitutes nonconformance with this specification. In case of conflict between the requirements ofthis specification and Specification A957/A957M, Specification A957/A957M shall prevail.8.
40、Repair by Welding8.1 The composition of the deposited weld metal may be similar to that of the casting, or may be suitably alloyed to achievethe desired corrosion resistance and mechanical properties.8.2 Weld repairs shall be subject to the same quality standards as are used to inspect the castings.
41、8.3 When post weld/heatpost-weld heat treatment is believed necessary for adequate corrosion resistance or impact resistance,Sup-plementary Requirement S33 Post Weld/Heat TreatmentSupplementary Requirement S33, Post-Weld Heat Treatment, shall beincluded in the purchase order.9. Product Marking9.1 Ca
42、stings shall be marked for material identification with the specification designation and grade. In addition, themanufacturersmanufacturers name or identification mark and the pattern number shall be cast or stamped using low-stress stampson all castings. Small-size castings may be such that marking
43、 must be limited, consistent with the available area. The marking ofheat numbers on individual castings shall be agreed upon between the manufacturer and the purchaser. Marking shall be in suchposition as not to injure the usefulness of the casting.10. Keywords10.1 austenite; duplex stainless steel;
44、 ferrite; stainless steel; steel castingsSUPPLEMENTARY 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 inSpecificationSpecifications A781/A7
45、81M and A957/A957M. Those that are ordinarily consideredsuitable for use with this specification are listed below by title only. Others enumerated inSpecificationSpecifications A781/A781M and A957/A957M may be used with this specification uponagreement between the manufacturer and purchaser.A890/A89
46、0M 185S2. Radiographic ExaminationS3. Liquid Penetrant ExaminationS5. Examination of Weld PreparationS6. CertificationS7. Prior Approval of Major Weld RepairsS9. Charpy Impact TestS10. Hardness TestS12. Test ReportS13. Unspecified ElementsS31. Estimating Ferrite ContentS31.1 Ferrite contents shall b
47、e determined by point count (Practice (Test Method E562), by other quantitative metallographicmethods such as image analysis (Practice E1245), by measurement of magnetic response, or by other methods upon agreementbetween the manufacturer and the purchaser. Frequency of testing and location of tests
48、 shall be by agreement between themanufacturer and the purchaser.S32. Tensile RequirementsS32.1 One tensile test shall be made from each heat and shall conform to the tensile requirements specified in Table S32.1. Testbars shall be poured in special blocks from the same heat as the castings represen
49、ted. (See S32.4.)S32.2 The bar from which the test specimen is removed shall be heat-treated in production furnaces to the same procedure asthe castings it represents.S32.3 TestS32.2 Test specimens may be cut from heat-treated castings, at the producers option, instead of from test bars.S32.4 Test S32.3 Test coupons may be cast integrally or as separate cast blocks in accordance with Figs. 1
