1、Designation:A743/A743M13a1Standard Specification forCastings,Iron-Chromium,Iron-Chromium-Nickel,CorrosionResistant,for General Application1This standard is issued under the fixed designation A743/A743M;the number immediately following the designation indicates the yearof original adoption or,in the
2、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 U.S.Department of Defense.1NOTETable 2 and Ta
3、ble S12.1 were editorially corrected in January 2014.1.Scope*1.1 This specification covers iron-chromium and iron-chromium-nickel alloy castings for general corrosion-resistantapplication.The grades covered by this specification representtypes of alloy castings suitable for broad ranges of applicati
4、onwhich are intended for a wide variety of corrosion environ-ments.NOTE1For alloy castings for severe corrosion-resistant service,reference should be made to Specification A744/A744M.For generalheat-resistant alloy castings,reference should be made to SpecificationA297/A297M.For nickel alloy casting
5、s for corrosion-resistant service,reference should be made to Specification A494/A494M.1.2 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;the
6、refore,each system mustbe used independently of the other.Combining values from thetwo systems may result in nonconformance with the specifi-cation.Inch-pound units are applicable for material ordered toSpecification A743 and SI units for material ordered toSpecification A743M.2.Referenced Documents
7、2.1 ASTM Standards:2A262 Practices for Detecting Susceptibility to IntergranularAttack in Austenitic Stainless SteelsA297/A297M Specification for Steel Castings,Iron-Chromium and Iron-Chromium-Nickel,Heat Resistant,for General ApplicationA370 Test Methods and Definitions for Mechanical Testingof Ste
8、el ProductsA494/A494M Specification for Castings,Nickel and NickelAlloyA744/A744M Specification for Castings,Iron-Chromium-Nickel,Corrosion Resistant,for Severe ServiceA781/A781M Specification for Castings,Steel and Alloy,Common Requirements,for General Industrial UseA890/A890M Specification for Cas
9、tings,Iron-Chromium-Nickel-MolybdenumCorrosion-Resistant,Duplex(Austenitic/Ferritic)for General ApplicationA957 Specification for Investment Castings,Steel andAlloy,Common Requirements,for General Industrial Use3.General Conditions for Delivery3.1 Except for investment castings,castings furnished to
10、this specification shall conform to the requirements of Speci-fication A781/A781M,including any supplementary require-ments that are indicated on the purchase order.Failure tocomply with the general requirements of Specification A781/A781M constitutes nonconformance with this specification.Incase of
11、 conflict between the requirements of this specificationand Specification A781/A781M,this specification shall pre-vail.3.2 Steel investment castings furnished to this specificationshall conform to the requirements of Specification A957,including any supplementary requirements that are indicated inth
12、e purchase order.Failure to comply with the general require-ments of Specification A957 constitutes nonconformance withthis specification.In case of conflict between the requirementsof this specification and Specification A957,SpecificationA957 shall prevail.4.Ordering Information4.1 Orders for mate
13、rial to this specification should includethe following,as required,to describe the material adequately:4.1.1 Description of the casting by pattern number ordrawing,4.1.2 Grade,1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the d
14、irect responsibility of SubcommitteeA01.18 on Castings.Current edition approved May 15,2013.Published June 2013.Originallyapproved in 1977.Last previous edition approved in 2013 as A743/A743M 13.DOI:10.1520/A0743_A0743M-13AE01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcont
15、act ASTM Customer Service at serviceastm.org.For Annual Book 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 Consho
16、hocken,PA 19428-2959.United States1 4.1.3 Heat treatment,4.1.4 Options in the specification,4.1.5 Whether castings are to be produced using the invest-ment casting process,and4.1.6 Supplementary requirements desired,including thestandards of acceptance.5.Process5.1 The steel shall be made by the electric furnace processwith or without separate refining such as argon-oxygen decar-burization(AOD).6.Heat Treatment6.1 Castings shall be heat treated in accordance with therequirements in Table 1.NOTE2
