1、Designation:A297/A297M17Standard 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 or,in
2、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 castings for heat
3、-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.NOTE1For heat-resisting alloys used for special product application,reference should be made to Specifications A35
4、1/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 the two systems may
5、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 issued by the Worl
6、d 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 Castings,Austenitic,forP
7、ressure-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 Requirements,for General Indust
8、rial 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 Speci-fication A781/A781M,including an
9、y 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 specificationand Specification A781/A781M,this spec
10、ification 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 require-ments of Specification A957/A957M
11、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 indicate thefollowing:4.1.1 A description of the
12、 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.Process5.1 Alloys shall be made by the following process
13、es: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 edition approved May 1,2017.Published May 2017.Ori
14、ginallyapproved 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 of ASTMStandards volume information,refer to the standards
15、 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 standard was developed in accordance with internationally recogniz
16、ed 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.1 6.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 specifie
