1、Designation: A297/A297M 17Standard Specification forSteel Castings, Iron-Chromium and Iron-Chromium-Nickel,Heat Resistant, for General Application1This standard is issued under the fixed designation A297/A297M; the number immediately following the designation indicates the yearof original adoption o
2、r, 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 iron-chromium and iron-chromium-nickel alloy castin
3、gs for heat-resistant service. Thegrades covered by this specification are general purpose alloysand no attempt has been made to include heat-resisting alloysused for special production application.NOTE 1For heat-resisting alloys used for special product application,reference should be made to Speci
4、fications A351/A351M, A217/A217M,and A447/A447M.1.2 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 th
5、e two systems may result in nonconformancewith the standard.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations
6、 issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A217/A217M Specification for Steel Castings, MartensiticStainless and Alloy, for Pressure-Containing Parts, Suit-able for High-Temperature ServiceA351/A351M Specification for
7、 Castings, Austenitic, forPressure-Containing PartsA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA447/A447M Specification for Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class), for High-TemperatureServiceA781/A781M Specification for Castings, Steel and Alloy,Common
8、Requirements, for General Industrial UseA957/A957M Specification for Investment Castings, Steeland Alloy, Common Requirements, for General IndustrialUse3. General Conditions for Delivery3.1 Except for investment castings, material furnished tothis specification shall conform to the requirements of S
9、peci-fication A781/A781M, including any supplementary require-ments that are indicated in the purchase order. Failure tocomply with the general requirements of Specification A781/A781M constitutes nonconformance with this specification. Incase of conflict between the requirements of this specificati
10、onand Specification A781/A781M, this specification shall pre-vail.3.2 Investment castings furnished to this specification shallconform to the requirements of Specification A957/A957M,including any supplementary requirements that are indicated inthe purchase order. Failure to comply with the general
11、require-ments of Specification A957/A957M constitutes nonconfor-mance with this specification. In case of conflict between therequirements of this specification and Specification A957/A957M, Specification A957/A957M shall prevail.4. Ordering Information4.1 The inquiry and order should include or ind
12、icate 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 The supplementary requirements desired including thestandards of acceptance.5. Process5
13、.1 Alloys shall be made by the following processes:electric-arc, electric-induction, or other approved processes.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.Current
14、edition approved May 1, 2017. Published May 2017. Originallyapproved in 1946. Last previous edition approved in 2014 as A297/A297M 14.DOI: 10.1520/A0297_A0297M-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book
15、 of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international s
16、tandard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.16.
17、 Heat Treatment6.1 Castings for heat-resistant service may be shipped in theas-cast condition without heat treatment. If heat treatment isrequired, the treatment shall be established by mutual agree-ment between the manufacturer and the purchaser and shall beso specified in the inquiry, contract, or
18、 order.7. Chemical Composition7.1 Alloys shall conform to the requirements as to chemicalcomposition prescribed in Table 1.8. Repair by Welding8.1 Except for Grade HG10MNN, the composition of thedeposited weld metal shall be similar to the composition of thecasting. For Grade HG10MNN, the filler met
19、al to be used shallbe established by mutual agreement between the manufacturerand the purchaser. All weld repairs shall be subjected to thesame inspection standards as the casting.8.2 Castings with major weld repairs shall be heat treated inaccordance with Section 6.8.3 Weld repairs shall be conside
20、red major when the depthof the cavity after preparation for repair exceeds 20 % of theactual wall thickness, or 1 in. 25 mm, whichever is smaller,or when the extent of the cavity exceeds approximately10 in.265 cm2.8.3.1 When Supplementary Requirement S7 is specified onthe purchase order or inquiry,
21、major weld repairs shall besubject to the prior approval of the purchaser.8.4 All other weld repairs shall be considered minor andmay be made at the discretion of the manufacturer withoutprior approval of the purchaser.TABLE 1 Chemical RequirementsAGrade/UNS NumberTypeComposition, % (max, except whe
22、re range is given)Carbon Manganese Silicon Phosphorus Sulfur Chromium Nickel MolybdenumBOtherCHFJ9260319 Chromium,9 Nickel0.20 0.40 2.00 2.00 0.04 0.04 18.0 23.0 8.0 12.0 0.50HHJ9350325 Chromium,12 Nickel0.20 0.50 2.00 2.00 0.04 0.04 24.0 28.0 11.0 14.0 0.50HIJ9400328 Chromium,15 Nickel0.20 0.50 2.0
23、0 2.00 0.04 0.04 26.0 30.0 14.0 18.0 0.50HKJ9422425 Chromium,20 Nickel0.20 0.60 2.00 2.00 0.04 0.04 24.0 28.0 18.0 22.0 0.50HEJ9340329 Chromium,9 Nickel0.20 0.50 2.00 2.00 0.04 0.04 26.0 30.0 8.0 11.0 0.50HTN0860515 Chromium,35 Nickel0.35 0.75 2.00 2.50 0.04 0.04 15.0 19.0 33.0 37.0 0.50HUN0800419 C
24、hromium,39 Nickel0.35 0.75 2.00 2.50 0.04 0.04 17.0 21.0 37.0 41.0 0.50HWN0800112 Chromium,60 Nickel0.35 0.75 2.00 2.50 0.04 0.04 10.0 14.0 58.0 62.0 0.50HXN0600617 Chromium,66 Nickel0.35 0.75 2.00 2.50 0.04 0.04 15.0 19.0 64.0 68.0 0.50HCJ9260528 Chromium 0.50 max 1.00 2.00 0.04 0.04 26.0 30.0 4.00
25、 0.50HDJ9300528 Chromium,5 Nickel0.50 max 1.50 2.00 0.04 0.04 26.0 30.0 4.0 7.0 0.50HLN0860429 Chromium,20 Nickel0.20 0.60 2.00 2.00 0.04 0.04 28.0 32.0 18.0 22.0 0.50HNJ9421320 Chromium,25 Nickel0.20 0.50 2.00 2.00 0.04 0.04 19.0 23.0 23.0 27.0 0.50HPN0870526 Chromium,35 Nickel0.35 0.75 2.00 2.50 0
26、.04 0.04 24 28 33 37 0.50HG10MNNJ9260419 Chromium,12 Nickel,4 Manganese0.07 0.11 3.0 5.0 0.70 0.040 0.03 18.5 20.5 11.5 13.5 0.25 0.45 Cu 0.50Nb(Cb)DN0.200.30CT15CN0815120 Chromium,33 Nickel,1 Niobium0.05 0.150.15 1.500.15 1.500.03 0.03 19.0 21.0 31.0 34.0 . . . Nb 0.50 1.50AWhere ellipses (. . .) a
27、ppear in this table there is no requirement, and the element need not be analyzed or reported.BCastings having a specified molybdenum range agreed upon by the manufacturer and the purchaser may also be furnished under these specifications.CNiobium (Nb) and Columbium (Cb) both designate element 41.DG
28、rade HG10MNN shall have a niobium content of not less than 8 the carbon, but not over 1.00 %.A297/A297M 172SUPPLEMENTARY REQUIREMENTSThe following supplementary requirements shall not apply unless specified in the purchase order. Alist of standardized supplementary requirements for use at the option
29、 of the purchaser is included inSpecification A781/A781M or A957/A957M. Those which are ordinarily considered suitable for usewith this specification are given below. Others enumerated in Specification A781/A781M orA957/A957M may be used with this specification upon agreement between the manufacture
30、r andpurchaser.S1. Magnetic Particle ExaminationS2. Radiographic ExaminationS3. Liquid Penetrant ExaminationS4. Ultrasonic ExaminationS5. Examination of Weld PreparationS6. CertificationS7. Prior Approval of Major Weld RepairsS8. MarkingS14. Tension TestS14.1 One tension test shall be made from mate
31、rial repre-senting each heat. The bar from which the test specimen istaken shall be heat treated in production furnaces to the sameprocedure as the castings it represents. The results shallconform to the requirements specified in Table S14.1.S14.2 Test bars shall be poured in separately cast keelblo
32、cks shown in Specification A781/A781M, unless the pur-chase order is for investment castings, in which case, testmaterial shall be poured in accordance with the requirements ofSpecification A957/A957M.S14.3 Tension test specimens may be cut from heat-treatedcastings; or from as-cast castings if no h
33、eat treatment isspecified for the castings, instead of from test bars when agreedupon between the manufacturer and the purchaser or at theoption of the producer if suitable separately cast test material isnot available.S14.4 Test specimens shall be the standard round 2-in.50-mm gage length specimen
34、shown in Specification A370,unless the purchase order is for investment castings, in whichcase, the specimen shall be in accordance with SpecificationA957/A957M.S14.5 If the results of the mechanical tests for any heat donot conform to the requirements specified, the castings may bere-heat treated a
35、nd retested, but may not be solution heattreated or re-austenitized more than twice.S14.6 If any test specimen shows defective machining ordevelops flaws, it may be discarded and another specimensubstituted from the same heat.TABLE S14.1 Tensile RequirementsAGradeTypeTensileStrength, minYield Point,
36、minElongationin 2in.50mm,min,%Bksi (MPa) ksi (MPa)HF 19 Chromium, 9Nickel70 (485) 35 (240) 25HH 25 Chromium, 12Nickel75 (515) 35 (240) 10HI 28 Chromium, 15Nickel70 (485) 35 (240) 10HK 25 Chromium, 20Nickel65 (450) 35 (240) 10HE 29 Chromium, 9Nickel85 (585) 40 (275) 9HT 15 Chromium, 35Nickel65 (450)
37、. . . . . . 4HU 19 Chromium, 39Nickel65 (450) . . . . . . 4HW 12 Chromium, 60Nickel60 (415) . . . . . . . . .HX 17 Chromium, 66Nickel60 (415) . . . . . . . . .HC 28 Chromium 55 (380) . . . . . . . . .HD 28 Chromium, 5Nickel75 (515) 35 (240) 8HL 29 Chromium, 20Nickel65 (450) 35 (240) 10HN 20 Chromium
38、, 25Nickel63 (435) . . . . . . 8HP 26 Chromium, 35Nickel62.5 (430) 34 (235) 4.5HG10MNN19 Chromium, 12Nickel,4 Manganese76 (525) 33 (225) 20CT15C 20 Chromium, 33Nickel,1 Niobium63 435 25 170 20.0AWhere ellipses (. . .) appear in this table there is no requirement, and the elementneed not be analyzed
39、or reported.BWhen ICI test bars are used in tensile testing as provided for in this specification,the gage length to reduced section diameter ratio shall be 4 to 1.A297/A297M 173SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue(A297
40、/A297M 14) that may impact the use of this standard. (Approved May 1, 2017.)(1) “Solution treated” changed to “solution heat treated” inparagraph S14.5 for consistency with Terminology A941.ASTM International takes no position respecting the validity of any patent rights asserted in connection with
41、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 responsibility.This standard is subject to revision at any time by the responsible technic
42、al 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 addressed to ASTM International Headquarters. Your comments will receive careful consideration
43、 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 the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbo
44、r 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). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 174
