ASTM_A_765_-_A_765M_-_07_2017.pdf

Designation:A765/A765M07(Reapproved 2017)Standard Specification forCarbon Steel and Low-Alloy Steel Pressure-Vessel-Component Forgings with Mandatory ToughnessRequirements1This standard is issued under the fixed designation A765/A765M;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.Scope1.1 This specification2covers heat-treated carbon steel andalloy steel forgings with mandatory toughness requirements.These forgings are intended for pressure vessels,feedwaterheaters,and similar uses.1.2 These forgings include tube sheets,covers,channelbarrels,integral forged channels,rings,nozzles,flanges,andsimilar parts.1.3 All grades are considered weldable under proper condi-tions.1.4 The maximum thickness of forgings produced to thisspecification is limited only by the capacity of the selectedgrade to respond to any heat treatment specified and to meet thespecified mechanical tests,including impact tests at the speci-fied temperature.1.5 Material supplied to this specification shall conform tothe requirements of Specification A788/A788M,which out-linesadditionalorderinginformation,manufacturingrequirements,testing and retesting methods and procedures,marking,certification,product analysis variations,and addi-tional supplementary requirements.1.6 If the requirements of this specification are in conflictwith the requirements of Specification A788/A788M,therequirements of this specification shall prevail.1.7 The values stated in either inch-pound units or SImetric units are to be regarded separately as the standard;within the text and tables,the SI units are shown in brackets.The values stated in each system are not exact equivalents;therefore,each system must be used independently of the other.Combining values from the two systems may result in noncon-formance with the specification.1.8 Unless the order specifies the applicable“M”specifica-tion designation,the material shall be furnished to the inch-pound units.2.Referenced Documents2.1 ASTM Standards:3A275/A275M Practice for Magnetic Particle Examination ofSteel ForgingsA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA388/A388M Practice for Ultrasonic Examination of SteelForgingsA788/A788M Specification for Steel Forgings,General Re-quirementsE112 Test Methods for Determining Average Grain SizeE165/E165M Practice for Liquid Penetrant Examination forGeneral Industry2.2 ASME Standard:4ASME Boiler and Pressure Vessel Code3.Ordering Information3.1 In addition to the ordering information requirements ofSpecification A788/A788M,a detailed sketch or written de-scription of the forging and the method of selecting the testlocation(see 6.2)should be supplied to the producer,whenappropriate areas of significant in-service loading of theforging need to be designated.3.2 The required impact test temperature should be suppliedif different than the temperature listed in Table 3,otherwise theimpact test shall be conducted at the temperature listed in Table3 for the chosen Grade.3.3 If a hubbed tube sheet is to be supplied forASME Boilerand Pressure Code Application Supplementary RequirementS12 of Specification A788/A788M shall be specified.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.06 on Steel Forgings and Billets.Current edition approved March 15,2017.Published March 2017.Originallyapproved in 1979.Last previous edition approved in 2012 as A765/A765M 07(2012).DOI:10.1520/A0765_A0765M-07R17.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA765/SA765M in Section II of that code.3For 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.4Available from American Society of Mechanical Engineers,Two Park Ave.,New York,NY 10016-5990,http:/www.asme.org.Copyright 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 3.4 If steel is required to be vacuum degassed,Supplemen-tary Requirement S8 of Specification A788/A788M should bespecified.4.Heat Treatment for Mechanical Properties4.1 Heat treatment shall consist of one of the following heattreatment options of the manufacturers choice.4.1.1 Normalize and temper.4.1.2 Double normalize,wherein the sec