ASTM_A_957_-_A_957M_-_15a.pdf

Designation:A957/A957M15aStandard Specification forInvestment Castings,Steel and Alloy,CommonRequirements,for General Industrial Use1This standard is issued under the fixed designation A957/A957M;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.1.Scope*1.1 This specification covers a group of requirements thatare mandatory for castings produced by the investment castingprocess to meet the metallurgical requirements of the followingsteel casting specifications issued by ASTM.ASTM DesignationTitle of SpecificationA27/A27MSteel Castings,Carbon,for General Ap-plicationA128/A128MSteel Castings,Austenitic ManganeseA148/A148MSteel Castings,High-Strength,for Struc-tural PurposesA297/A297MSteel Castings,Iron-Chromium and Iron-Chromium-Nickel,Heat-Resistant,forGeneral ApplicationA447/A447MSteel Castings,Chromium-Nickel-Iron Al-loy(25-12 Class),for High-TemperatureServiceA494/A494MCastings,Nickel and Nickel AlloyA560/A560MCastings,Chromium-Nickel AlloyA732/A732MCastings,Investment,Carbon and LowAlloy Steel for General Application,andCobalt Alloy for High Strength at ElevatedTemperaturesA743/A743MCastings,Iron-Chromium,Iron-Chromium-Nickel,Corrosion-Resistant,for GeneralApplicationA744/A744MCastings,Iron-Chromium-Nickel,Corro-sion Resistant,for Severe ServiceA747/A747MSteel Castings,Stainless,PrecipitationHardeningA890/A890MCastings,Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant,Duplex(Austenitic/Ferritic)for General Applica-tionA915/A915MSteel Castings,Carbon and Alloy,Chemi-cal Requirements Similar to StandardWrought GradesA958Steel Castings,Carbon and Alloy,withTensile Requirements,Chemical Require-ments Similar to Standard WroughtGradesA1002Castings,Nickel-Aluminum Ordered Alloy1.2 This specification also covers a group of supplementaryrequirements that may be applied to the above specifications asindicated therein.These are provided for use when additionaltesting or inspection is desired and apply only when specifiedindividually by the purchaser in the order.1.3 When investment castings are ordered,the requirementsstated in this specification form an integral part of the materialspecification.In cases of conflict,the requirements of thisspecification shall take precedence over the individual materialspecification requirements.1.4 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 result in non-conformancewith the standard.2.Referenced Documents2.1 ASTM Standards:2A27/A27M Specification for Steel Castings,Carbon,forGeneral ApplicationA128/A128M Specification for Steel Castings,AusteniticManganeseA148/A148M Specification for Steel Castings,HighStrength,for Structural PurposesA297/A297M Specification for Steel Castings,Iron-Chromium and Iron-Chromium-Nickel,Heat Resistant,for General ApplicationA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA380 Practice for Cleaning,Descaling,and Passivation ofStainless Steel Parts,Equipment,and SystemsA447/A447M Specification for Steel Castings,Chromium-Nickel-Iron Alloy(25-12 Class),for High-TemperatureServiceA488/A488M Practice for Steel Castings,Welding,Qualifi-cations of Procedures and PersonnelA494/A494M Specification for Castings,Nickel and NickelAlloyA560/A560M Specification for Castings,Chromium-NickelAlloy1This 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 Nov.1,2015.Published November 2015.Originallyapproved in 1996.Last previous edition approved in 2015 as A957/A957M 15.DOI:10.1520/A0957_A0957M-15A.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 States1 A609/A609M Practice for Castings,Carbon,Low-Alloy,and Martensitic Stainless Steel,Ultrasonic ExaminationThereofA732/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,Corrosion Resistant,for GeneralApplicationA744/A744M Specification for Castings,Iron-Chromium-Nickel,Corrosion Resistant,for Severe ServiceA747/A747M Specification for Steel Castings,Stainless,Precipitation Harde