1、Designation:A744/A744M13Standard Specification forCastings,Iron-Chromium-Nickel,Corrosion Resistant,forSevere Service1This standard is issued under the fixed designation A744/A744M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the
2、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 Department of Defense.1.Scope*1.1 This specification covers iron-c
3、hromium-nickel alloy,stainless steel castings intended for particularly severe corro-sive applications.1.2 This specification requires postweld heat-treatment ofall weld repairs affecting surfaces intended to be wetted by thecorrosive medium.For applications for which postweld heat-treatment is not
4、considered mandatory for retention of accept-able corrosion resistance,refer to Specification A743/A743M.NOTE1For general corrosion-resistant alloy castings,referenceshould be made to Specification A743/A743M.For general heat-resistantalloy castings,reference should be made to Specification A297/A29
5、7M.For nickel-base alloy castings,refer to Specification A494/A494M.1.3 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.Combini
6、ngvalues from the two systems may result in non-conformancewith the standard.1.3.1 Within the text,the SI units are shown in brackets.1.3.2 Inch-pound units are applicable for material ordered toSpecification A744 and SI units for material ordered toSpecification A744M.2.Referenced Documents2.1 ASTM
7、 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 Steel Produ
8、ctsA494/A494M Specification for Castings,Nickel and NickelAlloyA732/A732M Specification for Castings,Investment,Car-bon and Low Alloy Steel for General Application,andCobalt Alloy for High Strength at Elevated TemperaturesA743/A743M Specification for Castings,Iron-Chromium,Iron-Chromium-Nickel,Corro
9、sion Resistant,for GeneralApplicationA781/A781M Specification for Castings,Steel and Alloy,Common Requirements,for General Industrial UseA957 Specification for Investment Castings,Steel andAlloy,Common Requirements,for General Industrial UseE29 Practice for Using Significant Digits in Test Data toDe
10、termine Conformance with Specifications2.2 American Welding Society Standards:3AWS A5.11 Specification for Nickel and Nickel Alloy Cov-ered Welding ElectrodesAWS A5.14 Specification for Nickel and Nickel Alloy BareWelding Rods and Electrodes3.Terminology3.1 Definitions of Terms Specific to This Stan
11、dard:3.1.1 wetted surface,none that contacts a corrosive envi-ronment.4.General Conditions for Delivery4.1 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 indicate
12、d 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.1This specification is
13、 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 15,2013.Published June 2013.Originallyapproved in 1977.Last previous edition approved in 2011 as A744/A744M 101.DO
14、I:10.1520/A0744_A0744M-13.2For 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.3Available from The American Welding Soc
15、iety(AWS),550 NW LeJeune Rd.,Miami,FL 33126.*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 States1Copyright by ASTM Intl(all rights reserved);4.2 Steel investment castings furnishe
16、d to this specificationshall conform to the requirements of Specification A957,including any supplementary requirements that are indicated inthe 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.5.Ordering Information5.1 Orders for material to this specification should includethe following,as
