1、Designation: A 903/A 903M 99 (Reapproved 2007)Standard Specification forSteel Castings, Surface Acceptance Standards, MagneticParticle and Liquid Penetrant Inspection1This standard is issued under the fixed designation A 903/A 903M; the number immediately following the designation indicates the year
2、of 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 specification covers acceptance criteria for thesur
3、face 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 inspectionshal
4、l be in accordance with Specification A 903/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 usedin
5、dependently of the other. Combining values from the twosystems may result in a nonconformance with this specifica-tion.2. Referenced Documents2.1 ASTM Standards:2E 165 Test Method for Liquid Penetrant ExaminationE 709 Guide for Magnetic Particle Testing3. Terminology3.1 Definitions:3.1.1 linear indi
6、cationsan 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 indications are ind
7、ica-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 E 165 for liq-uid penet
8、rant inspection or Guide E 709 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 examin
9、ed.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 perform
10、ing 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 indicated by ble
11、ed-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 believed to be
12、 false may bereexamined. Surface conditioning may precede reexamination.When agreed upon between the manufacturer and purchaser,the liquid penetrant method may be used to verify the presence1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloy
13、s and is the direct responsibility of SubcommitteeA01.18 on Castings.Current edition approved Nov. 1, 2007. Published December 2007. Originallyapproved in 1991. Last previous edition approved in 2003 as A 903/A 903M-99(2003).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcon
14、tact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.of surface discontinu
15、ities 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. Acceptance Criteria7.1 Individual relevant
16、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, with the majordimension of this area not
17、 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 collectively unacceptablewhen they a
18、re 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 When the casting surface is being ins
19、pected 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. Certification8.1 The manufacturer shall certify t
20、hat inspection wasperformed in accordance with the appropriate practice (TestMethod E 165 for liquid penetrant inspection or Guide E 709for magnetic particle inspection) and that the parts were foundto meet the requirements of the specified inspection level ofSpecification A 903/A 903M (including ye
21、ar-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. Certified Test ReportsS1.1 A certifie
22、d 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 control number,S1.1.9 Name of inspec
23、tor, 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 validity of any such patent rights, a
24、nd 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 comments are invited either for revis
25、ion 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 not received a fair hearing you s
26、houldmake 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 copies) of this standard may be ob
27、tained 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).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 9.5A 903/A 903M 99 (2007)2
