1、Designation:A903/A903M99(Reapproved 2017)Standard Specification forSteel Castings,Surface Acceptance Standards,MagneticParticle and Liquid Penetrant Inspection1This standard is issued under the fixed designation A903/A903M;the number immediately following the designation indicates the yearof origina
2、l 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 specification covers acceptance criteria for thesurface inspection
3、of steel castings when nondestructivelyexamined by magnetic particle or liquid penetrant inspection.1.2 This specification is to be used wherever the inquiry,contract,order,or specification states that the acceptancestandards for magnetic particle or liquid penetrant inspectionshall be in accordance
4、 with Specification A903/A903M.1.3 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard.Within the text the SIunits are shown in brackets.The values stated in each systemare not exact equivalents;therefore each system must be usedindependently of the othe
5、r.Combining values from the twosystems may result in a nonconformance with this specifica-tion.2.Referenced Documents2.1 ASTM Standards:2E165 Practice for Liquid Penetrant Examination for GeneralIndustryE709 Guide for Magnetic Particle Testing3.Terminology3.1 Definitions:3.1.1 linear indicationsan i
6、ndication whose length isequal to or greater than three times its width shall be classifiedas a linear indication.3.1.2nonlinear indicationsan indication whose length isless than three times its width shall be classified as nonlinear.3.1.3 relevant indicationsrelevant indications are indica-tions wh
7、ich result from mechanical discontinuities.Only indi-cations whose major dimension exceeds116in.1.6 mm shallbe considered relevant.4.Ordering Information4.1 The inquiry and order should indicate the followinginformation:4.1.1 Nondestructive PracticePractice E165 for liquidpenetrant inspection or Gui
8、de E709 for magnetic particleinspection.Unless a specific technique within a practice isspecified,the choice shall be the option of the manufacturer.4.1.2 Personnel Qualifications:4.1.3 Extent of InspectionThe number of castings and theextent of casting surfaces to be examined.4.1.4 Acceptance Level
9、If more than one acceptance levelis specified for different locations,a nondestructive test draw-ing identifying acceptance levels and locations should accom-pany the inquiry and order.4.1.5 Supplementary Requirements,if any.5.Personnel Qualifications5.1 Personnel performing examination shall be qua
10、lified inaccordance with an acceptable written procedure as agreedupon between the purchaser and manufacturer.6.Evaluation of Indications6.1 All relevant indications shall be evaluated in terms ofthe acceptance criteria.6.2 Mechanical discontinuities are indicated by bleed-out ofthe penetrant or ret
11、ention of the magnetic particle examinationmedium.However,false indications may be produced bylocalized surface irregularities,metallurgical discontinuities,ormagnetic permeability variations.Any indication in excess ofthe acceptance criteria which is believed to be false may bereexamined.Surface co
12、nditioning may precede reexamination.When agreed upon between the manufacturer and purchaser,the liquid penetrant method may be used to verify the presenceof surface discontinuities which had been previously indicatedby the magnetic particle method.6.3 Broad areas of fluorescence,pigmentation,or par
13、ticleaccumulation which may mask indications of discontinuitiesare unacceptable,and such areas will be cleaned and reexam-ined.1This 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 Cas
14、tings.Current edition approved March 15,2017.Published March 2017.Originallyapproved in 1991.Last previous edition approved in 2012 as A903/A903M 99(2012).DOI:10.1520/A0903_A0903M-99R17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.
15、org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internation
16、ally 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 7.Acceptance Criteria7.1 Individual relevant linear and nonlinear indicationsexceeding the specified acceptance levels in Table 1 areunacceptable.7.2 Ten or more relevant indications,although individuallyacceptable,are collectively unacceptable when they o
