1、Designation: A 903/A 903M 99 (Reapproved 2003)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 (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers acceptance criteria for thesu
3、rface 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 inspectionsha
4、ll 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 usedi
5、ndependently of the other. Combining values from the twosystems may result in a nonconformance with this specifica-tion.2. Referenced Documents2.1 ASTM Standards:E 165 Test Method for Liquid Penetrant Examination2E 709 Guide for Magnetic Particle Examination23. Terminology3.1 Definitions:3.1.1 linea
6、r 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 indications a
7、re 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 PracticePractice E 165 for liquidpene
8、trant 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 exami
9、ned.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 perfor
10、ming 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 bl
11、eed-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 b
12、e 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 presenceof surface discontinuities which had been previously indicatedby the magnetic particle method.6.3 Broad areas
13、 of fluorescence, pigmentation, or particleaccumulation 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 res
14、ponsibility of SubcommitteeA01.18 on Castings.Current edition approved Oct. 1, 2003. Published October 2003. Originallyapproved in 1991. Last previous edition approved in 1999 as A 903/A 903M-99.2Annual Book of ASTM Standards, Vol 03.03.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C7
15、00, West Conshohocken, PA 19428-2959, United States.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
16、when they occur inany 6 in.238.7 cm.2 of casting surface, with 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 follow
17、ing relevant indications,although individually acceptable are 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 a
18、djoining indication by116 in. 1.6mm or less edge-to-edge.7.4 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 indicationrespecti
19、vely, and be evaluated in accordance with 7.1.8. Certification8.1 The manufacturer shall certify that inspection wasperformed in accordance with the appropriate practice (Prac-tice E 165 for liquid penetrant inspection or Guide E 709 formagnetic particle inspection) and that the parts were found tom
20、eet the requirements of the specified inspection level ofSpecification A 903/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
21、when specified by the purchaser in thecontract or order.S1. Certified 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,S
22、1.1.6 NDE procedure,S1.1.7 Acceptance criteria,S1.1.8 Vendor control 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 th
23、is standard are expressly advised that determination of the validity 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 ye
24、ars andif not revised, either reapproved or withdrawn. Your comments 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 commi
25、ttee, which you may attend. If you feel that your comments have 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 194
26、28-2959,United States. Individual reprints (single or multiple 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).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 (2003)2
