ASTM_A_745_-_A_745M_-_15.pdf

Designation:A745/A745M15Standard Practice forUltrasonic Examination of Austenitic Steel Forgings1This standard is issued under the fixed designation A745/A745M;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 practice2covers straight and angle beam contact,pulse-echo ultrasonic examination of austenitic steel forgingsproduced in accordance with Practice A388/A388M and Speci-fications A965/A965M and A1049/A1049M.1.2 Ultrasonic examination of nonmagnetic retaining ringforgings should be made to Practice A531/A531M rather thanthis practice.1.3 Supplementary requirements of an optional nature areprovided for use at the option of the purchaser.The supple-mentary requirements shall apply only when specified indi-vidually by the purchaser in the purchase order or contract.1.4 This practice is expressed in inch-pound and SI units;however,unless the purchase order or contract specifies theapplicable“M”specification designation(SI units),the inch-pound units shall apply.The values stated in either inch-poundunits or SI units are to be regarded separately as standard.Within the practice,the SI units are shown in brackets.Thevalues stated in each system may not be exact equivalents;therefore,each system shall be used independently of the other.Combining values from the two systems may result in noncon-formance with the standard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3A388/A388M Practice for Ultrasonic Examination of SteelForgingsA531/A531M Practice for Ultrasonic Examination ofTurbine-Generator Steel Retaining RingsA788/A788M Specification for Steel Forgings,General Re-quirementsA965/A965M Specification for Steel Forgings,Austenitic,for Pressure and High Temperature PartsA1049/A1049M Specification for Stainless Steel Forgings,Ferritic/Austenitic(Duplex),for Pressure Vessels andRelated ComponentsE317 Practice for Evaluating Performance Characteristics ofUltrasonic Pulse-Echo Testing Instruments and Systemswithout the Use of Electronic Measurement InstrumentsE428 Practice for Fabrication and Control of Metal,Otherthan Aluminum,Reference Blocks Used in UltrasonicTesting2.2American Society for Nondestructive Testing Docu-ment:4SNT-TC-1A Recommended Practice for Nondestructive Per-sonnel Qualification and Certification3.Ordering Information3.1 When this practice is to be applied to an inquiry orpurchase order,the purchaser shall furnish the followinginformation:3.1.1 Quality level of examination(see Section 12).3.1.2 Additional requirements to this practice.3.1.3 Applicability of supplementary requirements(seeSupplementary Requirements section).3.1.4 Supplementary requirements,if any.3.2 When specified,the manufacturer shall submit an ex-amination procedure for purchaser approval that shall include,but not be limited to,a sketch of the configuration as presentedfor ultrasonic examination showing the surfaces to be scanned,scanning directions,notch locations and sizes(if applicable),extent of coverage(if applicable),and an instruction listingcalibration and inspection details and stage of manufacture.4.Apparatus4.1 Electronic ApparatusA pulse-echo instrument permit-ting inspection frequencies of 1,2.25,and 5 MHz is required.1This practice is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloysand is the direct responsibility of SubcommitteeA01.06 on Steel Forgings and Billets.Current edition approved May 1,2015.Published May 2015.Originallyapproved in 1977.Last previous edition approved in 2012 as A745/A745M 12.DOI:10.1520/A0745_A0745M-15.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-745/SA-745M 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 fromAmerican Society for Nondestructive Testing(ASNT),P.O.Box28518,1711 Arlingate Ln.,Columbus,OH 43228-0518,http:/www.asnt.org.*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 The accuracy of discontinuity amplitude analysis using thispractice involves a knowledge of the true operating frequencyof the complete inspection system.One of the best ways toobtain the desired accuracy is by use of a tuned pulser andnarrow band amplifier of