1、Designation: A389/A389M 10Standard Specification forSteel Castings, Alloy, Specially Heat-Treated, for Pressure-Containing Parts, Suitable for High-Temperature Service1This standard is issued under the fixed designation A389/A389M; the number immediately following the designation indicates the yearo
2、f 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.This standard has been approved for use by agencies of the Department
3、 of Defense.1. Scope*1.1 This specification covers alloy steel castings, whichhave been subjected to special heat treatment, for valves,flanges, fittings, and other pressure-containing parts (Note 1)intended primarily for high-temperature service.1.2 The high-temperature properties of the materials
4、cov-ered in this specification are dependent upon special heattreatment that is required. Although the high-temperatureproperties are not specified, they are implied by control ofchemistry, heat treatment, and room-temperature properties.1.3 Two grades of ferritic alloy steel are covered (Note 2).Se
5、lection will depend on the design and service conditions,mechanical properties, and high-temperature characteristics.NOTE 1Carbon steel castings for pressure-containing parts are cov-ered by Specification A216/A216M. Alloy steel castings are covered bySpecification A217/A217M.NOTE 2The grades covere
6、d by this specification represent materialsthat are generally suitable for assembly with other castings or wroughtsteel parts by fusion welding. It is not intended to imply that these gradespossess equal degrees of weldability; therefore, it is the responsibility ofthe purchaser to establish for him
7、self a suitable welding technique. Sincethese grades possess varying degrees of suitability for resistance tooxidation and for high-temperature service, it is also the responsibility ofthe purchaser to determine which grade shall be furnished, due consider-ation being given to the requirements of th
8、e applicable construction codes.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems ma
9、y result in non-conformancewith the standard.2. Referenced Documents2.1 ASTM Standards:2A216/A216M Specification for Steel Castings, Carbon,Suitable for Fusion Welding, for High-Temperature Ser-viceA217/A217M Specification for Steel Castings, MartensiticStainless and Alloy, for Pressure-Containing P
10、arts, Suit-able for High-Temperature ServiceA488/A488M Practice for Steel Castings, Welding, Quali-fications of Procedures and PersonnelA703/A703M Specification for Steel Castings, General Re-quirements, for Pressure-Containing PartsA985/A985M Specification for Steel Investment CastingsGeneral Requi
11、rements, for Pressure-Containing Parts2.2 Manufacturers Standardization Society of the Valveand Fittings Industry Standard:SP-55 Quality Standard for Steel Castings for Valves,Flanges, and Fittings and other Components (VisualMethod)33. General Conditions for Delivery3.1 Except for steel investment
12、castings, material furnishedto this specification shall conform to the requirements ofSpecification A703/A703M, including any supplementary re-quirements that are indicated in the purchase order. Failure tocomply with the general requirements of A703/A703M consti-tutes nonconformance with the specif
13、ication. In case of conflictbetween the requirements of this specification and A703/A703M, this specification shall prevail.3.2 Steel investment castings furnished to this specificationshall conform to the requirements of Specification A985/1This specification is under the jurisdiction of ASTM Commi
14、ttee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.18 on Castings.Current edition approved July 1, 2010. Published August 2010. Originallyapproved in 1955. Last previous edition approved in 2008 as A389/A389M 08.DOI: 10.1520/A0389_A0389M-10.2For
15、referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Manufacturers Standardization Society of the Valve
16、 and FittingsIndustry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.A985M, including any supplementary
17、 requirements that areindicated in the purchase order. Failure to comply with thegeneral requirements of SpecificationA985/A985M constitutesnonconformance with this specification. In case of conflictbetween the requirements of this specification and Specifica-tion A985/A985M, Specification A985/A985
18、M shall prevail.4. Ordering Information4.1 The inquiry and order should include or indicate thefollowing:4.1.1 A description of the casting by pattern number ordrawing (dimensional tolerances shall be included on thecasting drawing),4.1.2 Grade of steel,4.1.3 Options in the specification, and4.1.4 T
19、he supplementary requirements desired including thestandards of acceptance.5. Heat Treatment5.1 All castings shall receive a heat treatment proper to theirdesign and chemical composition. Heat treatment shall beperformed before machining except in instances when reheattreating is necessary. All cast
20、ings shall have been allowed tocool, after pouring, to a temperature below the critical rangebefore heat treatment.5.2 At the option of the manufacturer the castings may begiven any preliminary heat treatment that will aid in theirprocessing.5.3 All castings shall receive a final heat treatment cons
21、ist-ing of normalizing and tempering at the temperature prescribedfor each grade in Table 1.5.4 Furnace temperatures for heat treating shall be effec-tively controlled by use of pyrometers.6. Chemical Composition6.1 The steel shall conform to the requirements as tochemical composition prescribed in
22、Table 2.7. Tensile Requirements Tensile Requirements7.1 Steel used for the castings shall conform to the require-ments as to tensile properties prescribed in Table 3.8. Quality8.1 The surface of the casting shall be examined visuallyand shall be free of adhering sand, scale, cracks, and hot tears.Ot
23、her surface discontinuities shall meet the visual acceptancestandards specified in the order. Visual Method SP-55 or othervisual standards may be used to define acceptable surfacediscontinuities and finish. Unacceptable visual surface discon-tinuities shall be removed and their removal verified by v
24、isualexamination of the resultant cavities. When methods involvinghigh temperature are used in the removal of discontinuities,castings shall be preheated to at least the minimum tempera-tures in Table 4.8.2 The castings shall not be peened, plugged, or impreg-nated to stop leaks.9. Repair by Welding
25、9.1 Repair shall be made by using a welding procedure andoperators qualified in accordance with Practice A488/A488M.The composition of the deposit weld material shall be similarto that of the casting, or of other composition as may be agreedupon between the manufacturer and the purchaser. The castin
26、gsafter complement of weld repairing shall be retempered exceptthat local tempering of the weld repairs will be permitted if, inthe manufacturers opinion, complete furnace-heat treatmentwould be damaging to the finished surfaces of a machinedcasting. Heat treatments after weld repair other than temp
27、eringshall be performed only when agreed upon between themanufacturer and the purchaser.9.2 Weld repairs shall be considered major in the case of acasting that had leaked on hydrostatic test, or when the depthof cavity prepared for welding exceeds 20 % of the actual wallthickness or 1 in. 25.4 mm, w
28、hichever is smaller, or when theextent of the cavity exceeds approximately 10 in.264.5 cm2.When requested by the purchasers inspector, such weld repairsshall be subject to his approval. He shall also have the right torequire complete reheat treatment of the repaired casting inTABLE 1 Heat Treating T
29、emperaturesGrade NormalizingTemperature,FCTemperingTemperature,FCHoldingTime, hC23 18501950 12501350 1A10101065 675730C24 18501950 12501350 1210101065 675730APer inch or less of thickness.TABLE 2 Chemical RequirementsGrade (UNS No.) Composition, %C23 (J12080) C24 (J12092)Carbon, max 0.20 0.20Mangane
30、se 0.300.80 0.300.80Phosphorus, max 0.035 0.035Sulfur, max 0.035 0.035Silicon, max 0.60 0.60Chromium 1.001.50 0.801.25Molybdenum 0.450.65 0.901.20Vanadium 0.150.25 0.150.25TABLE 3 Tensile RequirementsGrade C23 C24Tensile strength, min, ksi MPa 70 80483 552Yield strength,Amin, ksi MPa 40 50276 345Elo
31、ngation in 2 in. 50 mm, min, %B18.0 15.0Reduction of area, min, % 35.0 35.0ADetermine by either 0.2 % offset or 0.5 % extension-under-load method.BWhen ICI test bars are used in tensile testing as provided for in SpecificationA703/A703M, the gage length to reduced section diameter ratio shall be 4 t
32、o 1.TABLE 4 Minimum Preheat TemperatureGrade Minimum Preheat Temperature, FCC23 300 150C24 300 150A389/A389M 102accordance with 5.3. When mutually agreed upon between thepurchaser and the manufacturer, major repair weld may beexamined at the manufacturers expense by magnetic particleexamination or r
33、adiographing, or both, to check the adequacyof the repair.10. Keywords10.1 steel castings; alloy steel; pressure containing parts;high temperature applicationsSUPPLEMENTARY REQUIREMENTSThe following supplementary requirements shall not apply unless specified in the purchase order. Alist of standardi
34、zed supplementary requirements for use at the option of the purchaser is included inSpecification A703/A703M. Those which are ordinarily considered suitable for use with thisspecification are given below. Others enumerated in SpecificationA703/A703M may be used with thisspecification upon agreement
35、between the manufacturer and purchaser.S1. Residual Elements Chemical AnalysisS2. Destruction TestsS3. Bend TestsS4. Magnetic Particle InspectionS5. Radiographic InspectionS10. Examination of Weld PreparationSUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this stan
36、dard since the last issue(A389/A389M 08) that may impact the use of this standard. (Approved July 1, 2010.)(1) Table 2, changed Phosphorus and Sulfur values.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standar
37、d. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed
38、 every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible t
39、echnical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Consho
40、hocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).A389/A389M 103
