1、Designation:E19215Standard Reference Radiographs ofInvestment Steel Castings for Aerospace Applications1This standard is issued under the fixed designation E192;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revisio
2、n.A number in parentheses indicates the year of last reapproval.Asuperscript 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 The reference radiographs provided in the adjunct
3、 to thisstandard illustrate various types and degrees of discontinuitiesoccurring in thin-wall steel investment castings.2Use of thisstandard for the specification or grading of castings requiresprocurement of the adjunct reference radiographs which illus-trate the discontinuity types and severity l
4、evels.They areintended to provide the following:1.1.1 Aguide enabling recognition of thin-wall steel castingdiscontinuities and their differentiation both as to type anddegree through radiographic examination.1.1.2 Example radiographic illustrations of discontinuitiesand a nomenclature for reference
5、 in acceptance standards,specifications and drawings.1.2 Two illustration categories are covered as follows:1.2.1 GradedSix common discontinuity types each illus-trated in eight degrees of progressively increasing severity.1.2.2 UngradedTwelve single illustrations of additionaldiscontinuity types an
6、d of patterns and imperfections notgenerally regarded as discontinuities.1.3 The reference radiographs were developed for castingsections up to 1 in.(25.4 mm)in thickness.1.4 This document may be used where there is no otherapplicable document existing or for other material thicknessesfor which it i
7、s found to be applicable and for which agreementhas been reached between the purchaser and manufacturer.NOTE1The set of reference radiographs,produced with X-rays in therange from 130 to 250 kVp,consist of 16 plates(812by 11 in.(216 by 279mm)in a 934by 1112-in.(248 by 292-mm)ring binder.1.5 From tim
8、e to time,there may be minor changes to theprocess for manufacturing of the reference radiograph adjunctmaterials.These changes could include changes in the films orprocessing chemicals used,changes in the dies or printing forthe cardboard mats,etc.;however,in all cases,these changesare reviewed by
9、the Illustration Monitoring Subcommittee andall reference radiographs are reviewed against a fixed prototypeimage to ensure that there are no changes to the acceptancelevel represented by the reference radiographs.Therefore,theadjunct reference radiographs remain valid for use with thisstandard rega
10、rdless of the date of production or the revisionlevel of the text standard.1.6 These film reference radiographs are not intended toillustrate the types and degrees of discontinuities found inaerospace investment castings when performing digital X-rayimaging.When performing digital X-ray imaging of t
11、hesecastings,refer to Digital Reference Image Standard E2660.1.7 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are mathemati-cal conversions to SI units that are provided for informationonly and are not considered standard.1.8 This standard d
12、oes 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 Standa
13、rds:3E94 Guide for Radiographic ExaminationE1025 Practice for Design,Manufacture,and MaterialGrouping Classification of Hole-Type Image Quality In-dicators(IQI)Used for RadiologyE1316 Terminology for Nondestructive ExaminationsE2660 Digital Reference Images for Investment Steel Cast-ings for Aerospa
14、ce Applications2.2 ASTM Adjuncts:Reference Radiographs of Investment Steel Castings forAerospace Applications41These reference radiographs are under the jurisdiction of ASTM CommitteeE07 on Nondestructive Testing and are the direct responsibility of SubcommitteeE07.02 on Reference Radiological Image
15、s.Current edition approved Sept.1,2015.Published September 2015.Originallyapproved in 1962.Last previous edition approved in 2013 as E192-13.DOI:10.1520/E0192-15.2The reference radiographs are considered to be applicable to all thin-wall steelcastings,requiring close tolerances.Such castings general
16、ly include those made bythe lost wax,frozen mercury,ceramicast or shell mold processes.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 ASTM Headquarters,Order RRE0192.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,Wes
