1、Designation: A 389/A 389M 03Standard Specification forSteel Castings, Alloy, Specially Heat-Treated, for Pressure-Containing Parts, Suitable for High-Temperature Service1This standard is issued under the fixed designation A 389/A 389M; the number immediately following the designation indicates the y
2、earof 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 (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Depar
3、tment 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 mater
4、ials 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
5、2).Selection 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 A 216/A 216M. Alloy steel castings are covered bySpecification A 217/A 217M.NOTE 2The grad
6、es covered 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 establis
7、h for himself 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 requireme
8、nts of the applicable construction codes.1.4 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem are not exact equivalents; therefore, each system mustbe used independen
9、tly of the other. Combining values from thetwo systems may result in nonconformance with the specifi-cation.2. Referenced Documents2.1 ASTM Standards:A 216/A 216M Specification for Steel Castings, Carbon,Suitable for Fusion Welding, for High-Temperature Ser-vice2A 217/A 217M Specification for Steel
10、Castings, MartensiticStainless and Alloy, for Pressure-Containing Parts, Suit-able for High-Temperature Service2A 488/A 488M Practice for Steel Castings, Welding, Quali-fications of Procedures and Personnel2A 703/A 703M Specification for Steel Castings, GeneralRequirements, for Pressure-Containing P
11、arts22.2 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 Material furnished to this specification shall conform tothe
12、requirements of Specification A 703/A 703M, includingany supplementary requirements that are indicated in thepurchase order. Failure to comply with the general require-ments of A 703/A 703M constitutes nonconformance with thisspecification. In case of conflict between the requirements ofthis specifi
13、cation and A 703/A 703M, this specification shallprevail.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
14、 Options in the specification, and4.1.4 The supplementary requirements desired including thestandards of acceptance.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.18 on Castings.Curre
15、nt edition approved April 10, 2003. Published April 2003. Originallyapproved in 1955. Last previous edition approved in 1998 as A 389 93 (1998).2Annual Book of ASTM Standards, Vol 01.02.3Available from Manufacturers Standardization Society of the Valve and FittingsIndustry (MSS), 127 Park St., NE, V
16、ienna, VA 22180-4602.1*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.5. Heat Treatment5.1 All castings shall receive a heat treatment proper to theirdesign and chemica
17、l composition. Heat treatment shall beperformed before machining except in instances when reheattreating is necessary. All castings 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 beg
18、iven any preliminary heat treatment that will aid in theirprocessing.5.3 All castings shall receive a final heat treatment consist-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 us
19、e of pyrometers.6. Chemical Composition6.1 The steel shall conform to the requirements as tochemical composition prescribed in 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. Qual
20、ity8.1 The surface of the casting shall be examined visuallyand shall be free of adhering sand, scale, cracks, and hot tears.Other surface discontinuities shall meet the visual acceptancestandards specified in the order. Visual Method SP-55 or othervisual standards may be used to define acceptable s
21、urfacediscontinuities and finish. Unacceptable visual surface discon-tinuities shall be removed and their removal verified by visualexamination of the resultant cavities. When methods involvinghigh temperature are used in the removal of discontinuities,castings shall be preheated to at least the min
22、imum tempera-tures in Table 4.8.2 The castings shall not be peened, plugged, or impreg-nated to stop leaks.9. Repair by Welding9.1 Repair shall be made by using a welding procedure andoperators qualified in accordance with PracticeA 488/A 488M.The composition of the deposit weld material shall be si
23、milarto that of the casting, or of other composition as may be agreedupon between the manufacturer and the purchaser. The castingsafter complement of weld repairing shall be retempered exceptthat local tempering of the weld repairs will be permitted if, inthe manufacturers opinion, complete furnace-
24、heat treatmentwould be damaging to the finished surfaces of a machinedcasting. Heat treatments after weld repair other than temperingshall 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 o
25、n hydrostatic test, or when the depthof cavity prepared for welding exceeds 20 % of the actual wallthickness or 1 in. 25.4 mm, whichever 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
26、his approval. He shall also have the right torequire complete reheat treatment of the repaired casting inaccordance 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 radiogra
27、phing, or both, to check the adequacyof the repair.10. Keywords10.1 steel castings; alloy steel; pressure containing parts;high temperature applicationsTABLE 1 Heat Treating TemperaturesGrade NormalizingTemperature,FCTemperingTemperature,FCHoldingTime, hC23 18501950 12501350 1A10101065 675730C24 185
28、01950 12501350 1210101065 675730APer inch or less of thickness.TABLE 2 Chemical RequirementsGrade (UNS No.) Composition, %C23 (J12080) C24 (J12092)Carbon, max 0.20 0.20Manganese 0.300.80 0.300.80Phosphorus, max 0.04 0.04Sulfur, max 0.045 0.045Silicon, max 0.60 0.60Chromium 1.001.50 0.801.25Molybdenu
29、m 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 345Elongation 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
30、-under-load method.BWhen ICI test bars are used in tensile testing as provided for in SpecificationA 703/A 703M, the gage length to reduced section diameter ratio shall be 4 to 1.TABLE 4 Minimum Preheat TemperatureGrade Minimum Preheat Temperature, FCC23 300 150C24 300 150A 389/A 389M 032SUPPLEMENTA
31、RY 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 inSpecification A 703/A 703M. Those which are ordinarily considered suitable for use wit
32、h thisspecification are given below. Others enumerated in Specification A 703/A 703M may be used withthis specification upon agreement between the manufacturer and purchaser.S1. Residual Elements Chemical AnalysisS2. Destruction TestsS3. Bend TestsS4. Magnetic Particle InspectionS5. Radiographic Ins
33、pectionS10. Examination of Weld PreparationSUMMARY OF CHANGESCommittee A01 has identified the location of selected changes made to this standard since the last issue(A 389/A 389M93 (1998) that may impact the use of this standard.(1) Added the UNS Numbers to the grades in Table 2.ASTM International t
34、akes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. 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
35、responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed 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 addr
36、essed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical 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
37、the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, 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).A 389/A 389M 033
