ASTM_A_743_-_A_743M_-_19.pdf

Designation:A743/A743M19Standard 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 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.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 applicationwhich 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 castings 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;therefore,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.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 World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 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 ApplicationA494/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 Castings,Iron-Chromium-Nickel-MolybdenumCorrosion-Resistant,Duplex(Austenitic/Ferritic)for General ApplicationA957/A957M Specification for Investment Castings,Steeland Alloy,Common Requirements,for General IndustrialUse3.General Conditions for Delivery3.1 Except for investment castings,castings furnished tothis 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 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/A957M,including any supplementary requirements that areindicated in the purchase order.Failure to comply with thegeneral requirements of Specification A957/A957M consti-tutes nonconformance with this specification.In case of con-flict between the requirements of this specification and Speci-fication A957/A957M,Specification A957/A957M shallprevail.4.Ordering Information4.1 Orders for material to this specification should includethe following,as required,to describe the material adequately: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 March 1,2019.Published March 2019.Originallyapproved in 1977.Last previous edition approved in 2017 as A743/A743M 17.DOI:10.1520/A0743_A0743M-19.2For 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 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 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.1 4.1.1 Description of