Designation:A 903/A 903M –99(Reapproved 2003)
Standard Specification for
Steel Castings,Surface Acceptance Standards,Magnetic Particle and Liquid Penetrant Inspection 1
长信秋词五首This standard is issued under the fixed designation A 903/A 903M;the number immediately following the designation indicates the year of original adoption or,in the ca of revision,the year of last revision.A number in parenthes indicates the year of last reapproval.A superscript epsilon (e )indicates an editorial change since the last revision or reapproval.
1.Scope
1.1This specification covers acceptance criteria for the surface inspection of steel castings when nondestructively examined by magnetic particle or liquid penetrant inspection.1.2This specification is to be ud wherever the inquiry,contract,order,or specification states that the acceptance standards for magnetic particle or liquid penetrant inspection shall be in accordance with Specification A 903/A 903M.1.3The values stated in either inch-pound units or SI units are to be regarded parately as standard.Within the text the SI units are shown in brackets.The values stated in each system are not exact equivalents;therefore each system must be ud independently of the other.Combining values from the two systems may result in a nonconformance with this specifica-tion.
2.Referenced Documents 2.1ASTM Standards:
E 165Test Method for Liquid Penetrant Examination 2E 709Guide for Magnetic Particle Examination 23.Terminology 3.1Definitions:
3.1.1linear indications —an indication who length is equal to or greater than three times its width shall be classified as a linear indication.
3.1.2nonlinear indications —an indication who length is less than three times its width shall be classified as nonlinear.3.1.3relevant indications —relevant indications are indica-tions which result from mechanical discontinuities.Only indi-cations who major dimension exceeds 1⁄16in.[1.6mm]shall be considered relevant.
4.Ordering Information
4.1The inquiry and order should indicate the following information:
4.1.1Nondestructive Practice —Practice E 165for liquid penetrant inspection or Guide E 709for magnetic particle inspection.Unless a specific technique within a practice is specified,the choice shall be the option of the manufacturer.4.1.2Personnel Qualifications .
4.1.3Extent of Inspection —The number of castings and the extent of casting surfaces to be examined.
4.1.4Acceptance Level —If more than one acceptance level is specified for different locations,a nondestructive test draw-ing identifying acceptance levels and locations should accom-pany the inquiry and order.
4.1.5Supplementary Requirements ,if any.
5.Personnel Qualifications
5.1Personnel performing examination shall be qualified in accordance with an acceptable written procedure as agreed upon between the purchar and manufacturer.
6.Evaluation of Indications豆花怎么制作
6.1All relevant indications shall be evaluated in terms of the acceptance criteria.
6.2Mechanical discontinuities are indicated by bleed-out of the penetrant or retention of the magnetic particle examination medium.However,fal indications may be produced by localized surface irregularities,metallurgical discontinuities,or magnetic permeability variations.Any indication in excess of the acceptance criteria which is believed to be fal may be reexamined.Surface conditioning may precede reexamination.When agreed upon between the manufacturer and purchar,the liquid penetrant method may be ud to verify the prence of surface discontinuities which had been previously indicated by the magnetic particle method.
6.3Broad areas of fluorescence,pigmentation,or particle accumulation which may mask indications of
discontinuities are unacceptable,and such areas will be cleaned and reexam-ined.
1
This specification is under the jurisdiction of ASTM Committee A01on Steel,Stainless Steel,and Related Alloys and is the direct responsibility of Subcommittee A01.18on Castings.
Current edition approved Oct.1,2003.Published October 2003.Originally approved in 1991.Last previous edition approved in 1999as A 903/A 903M-99.2
Annual Book of ASTM Standards ,V ol 03.03.
1
Copyright ©ASTM International,100Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United
States.
7.Acceptance Criteria
7.1Individual relevant linear and nonlinear indications exceeding the specified acceptance levels in Table 1are unacceptable.
系统总爱装病弱7.2Ten or more relevant indications,although individually acceptable,are collectively unacceptable when they occur in any 6in.2[38.7cm.2]of casting surface,with the major dimension of this area not to exceed 6in.[152mm]taken in the most unfavorable orientation relative to the indications being evaluated.
播放器哪个好七年级语文课本7.3When the casting surface is being inspected to Accep-tance Levels I,II,or III the following relevant indications,although individually acceptable are collectively unacceptable when they are grouped as described in 7.3.1and 7.3.2.
7.3.1Four or more in a line,parated by 1⁄16in.[1.6mm]or less edge-to-edge.
7.3.2Four or more that are clustered and individually parated from the nearest adjoining indication by 1⁄16in.[1.6mm]or less edge-to-edge.
7.4When the casting surface is being inspected to Accep-tance Levels IV or V ,individually acceptable relevant indica-tions grouped as described in 7.3.1and 7.3.2shall be consid-ered a single relevant linear and nonlinear indication respectively,and be evaluated in accordance with 7.1.8.Certification
8.1The manufacturer shall certify that inspection was performed in accordance with the appropriate practice (Prac-tice E 165for liquid penetrant inspection or Guide E 709for magnetic particle inspection)and that the parts were found to meet the requirements of the specified inspection level of Specification A 903/A 903M (including year-date).
8.2When certified test reports are required by the purchar,Supplementary Requirement S1shall be specified.
SUPPLEMENTARY REQUIREMENTS
The following supplementary requirements shall apply only when specified by the purchar in the contract or order.
S1.Certified Test Reports
S1.1A certified test report shall be furnished by the manu-facturer,listing the following as a minimum:S1.1.1Customer name,
S1.1.2Purcha order number,S1.1.3Material,
S1.1.4Description of part,
S1.1.5Vendor name,S1.1.6NDE procedure,S1.1.7Acceptance criteria,S1.1.8Vendor control number,S1.1.9Name of inspector,and
S1.1.10Inspector qualification level.
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TABLE 1Surface Inspection Acceptance Criteria Indication Size,
郑和是哪个朝代的in.[mm]
Type Level I Level II Level III Level IV Level V Linear 1⁄16
[1.6]1⁄8[3.2]3⁄16
[4.8]1⁄4[6.4]3⁄8
拜年的祝福语
[9.5]Nonlinear
1⁄8[3.2]3⁄16[4.8]
3⁄16[4.8]1⁄4[6.4]
3⁄8
[9.5]
