1、Designation: A903/A903M 99 (Reapproved 2012)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 o
2、riginal 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
3、 inspection 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
4、 in accordance with Specification A903/A 903M.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 usedindepen
5、dently of the other. 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 l
6、inear indicationsan indication whose length isequal to or greater than three times its width shall be classifiedas a linear indication.3.1.2 nonlinear indicationsan indication whose length isless than three times its width shall be classified as nonlinear.3.1.3 relevant indicationsrelevant indicatio
7、ns are indica-tions which result from mechanical discontinuities. Only indi-cations whose major dimension exceeds116 in. 1.6 mm shallbe considered relevant.4. Ordering Information4.1 The inquiry and order should indicate the followinginformation:4.1.1 Nondestructive PracticeTest Method E165 for liq-
8、uid penetrant inspection or Guide 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 b
9、e examined.4.1.4 Acceptance LevelIf 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
10、 performing examination shall be qualified 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 indicate
11、d by bleed-out ofthe penetrant or retention 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 believ
12、ed to be false may be1This 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 March 1, 2012. Published April 2012. Originallyapproved in 1991. Last previ
13、ous edition approved in 2007 as A903/A903M-99(2007). DOI: 10.1520/A0903_A0903M-99R12.2For 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
14、page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.reexamined. Surface conditioning may precede reexamination.When agreed upon between the manufacturer and purchaser,the liquid penetrant method may be used to ver
15、ify the presenceof surface discontinuities which had been previously indicatedby the magnetic particle method.6.3 Broad areas of fluorescence, pigmentation, or particleaccumulation which may mask indications of discontinuitiesare unacceptable, and such areas will be cleaned and reexam-ined.7. Accept
16、ance 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 occur inany 6 in.238.7 cm.2 of casting surface, wit
17、h the majordimension of this area not to exceed 6 in. 152 mm taken inthe most unfavorable orientation relative to the indicationsbeing evaluated.7.3 When the casting surface is being inspected to Accep-tance Levels I, II, or III the following relevant indications,although individually acceptable are
18、 collectively unacceptablewhen they are grouped as described in 7.3.1 and 7.3.2.7.3.1 Four or more in a line, separated by116 in. 1.6 mmor less edge-to-edge.7.3.2 Four or more that are clustered and individuallyseparated from the nearest adjoining indication by116 in. 1.6mm or less edge-to-edge.7.4
19、When the casting surface is being inspected to Accep-tance Levels IV or V, individually acceptable relevant indica-tions grouped as described in 7.3.1 and 7.3.2 shall be consid-ered a single relevant linear and nonlinear indicationrespectively, and be evaluated in accordance with 7.1.8. Certificatio
20、n8.1 The manufacturer shall certify that inspection wasperformed in accordance with the appropriate practice (TestMethod E165 for liquid penetrant inspection or Guide E709 formagnetic particle inspection) and that the parts were found tomeet the requirements of the specified inspection level ofSpeci
21、fication A903/A 903M (including year-date).8.2 When certified test reports are required by the purchaser,Supplementary Requirement S1 shall be specified.SUPPLEMENTARY REQUIREMENTSThe following supplementary requirements shall apply only when specified by the purchaser in thecontract or order.S1. Cer
22、tified Test ReportsS1.1 A certified test report shall be furnished by the manu-facturer, listing the following as a minimum:S1.1.1 Customer name,S1.1.2 Purchase order number,S1.1.3 Material,S1.1.4 Description of part,S1.1.5 Vendor name,S1.1.6 NDE procedure,S1.1.7 Acceptance criteria,S1.1.8 Vendor co
23、ntrol number,S1.1.9 Name of inspector, andS1.1.10 Inspector qualification level.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the val
24、idity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your com
25、ments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have
26、 not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple
27、copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 1 Surface Inspection Acceptance Criteria Indication Size,in. mmType Level I Level II Level III Level IV Level VLinear116 1.618 3.2316 4.814 6.438 9.5Nonlinear18 3.2316 4.8316 4.814 6.438 9.5A903/A903M 99 (2012)2
