Standard Specification for Steel Castings, Surface Acceptance Standards, Magnetic Particle and Liquid Penetrant Inspection

SCOPE
1.1 This specification covers acceptance criteria for the surface inspection of steel castings when nondestructively examined 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 acceptance standards for magnetic particle or liquid penetrant inspection shall be in accordance with Specification A903/ A903M.
1.3 The values stated in either inch-pound units or SI units are to be regarded separately 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 used independently of the other. Combining values from the two systems may result in a nonconformance with this specification.

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09-Apr-1999
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ASTM A903/A903M-99 - Standard Specification for Steel Castings, Surface Acceptance Standards, Magnetic Particle and Liquid Penetrant Inspection
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
Designation: A 903/A 903M – 99
Standard Specification for
Steel Castings, Surface Acceptance Standards, Magnetic
Particle and Liquid Penetrant Inspection
This standard is issued under the fixed designationA903/A903M; the number immediately following the designation indicates the year
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 (ϵ) indicates an editorial change since the last revision or reapproval.
1. Scope 4.1.1 Nondestructive Practice—Practice E 165E 165 for
liquid penetrant inspection or Guide E 709E 709 for magnetic
1.1 This specification covers acceptance criteria for the
particle inspection. Unless a specific technique within a prac-
surface inspection of steel castings when nondestructively
tice is specified, the choice shall be the option of the manu-
examined by magnetic particle or liquid penetrant inspection.
facturer.
1.2 This specification is to be used wherever the inquiry,
4.1.2 Personnel Qualifications.
contract, order, or specification states that the acceptance
4.1.3 Extent of Inspection—The number of castings and the
standards for magnetic particle or liquid penetrant inspection
extent of casting surfaces to be examined.
shall be in accordance with Specification A 903/A 903M.
4.1.4 Acceptance Level—If more than one acceptance level
1.3 The values stated in either inch-pound units or SI units
is specified for different locations, a nondestructive test draw-
are to be regarded separately as standard.Within the text the SI
ing identifying acceptance levels and locations should accom-
units are shown in brackets. The values stated in each system
pany the inquiry and order.
are not exact equivalents; therefore each system must be used
4.1.5 Supplementary Requirements, if any.
independently of the other. Combining values from the two
systems may result in a nonconformance with this specifica-
5. Personnel Qualifications
tion.
5.1 Personnel performing examination shall be qualified in
2. Referenced Documents accordance with an acceptable written procedure as agreed
upon between the purchaser and manufacturer.
2.1 ASTM Standards:
E 165 Test Method for Liquid Penetrant Examination
6. Evaluation of Indications
E 709 Guide for Magnetic Particle Examination
6.1 All relevant indications shall be evaluated in terms of
3. Terminology the acceptance criteria.
6.2 Mechanical discontinuities are indicated by bleed-out of
3.1 Definitions:
the penetrant or retention of the magnetic particle examination
3.1.1 linear indications—an indication whose length is
medium. However, false indications may be produced by
equal to or greater than three times its width shall be classified
localized surface irregularities, metallurgical discontinuities, or
as a linear indication.
magnetic permeability variations. Any indication in excess of
3.1.2 nonlinear indications—an indication whose length is
the acceptance criteria which is believed to be false may be
less than three times its width shall be classified as nonlinear.
reexamined. Surface conditioning may precede reexamination.
3.1.3 relevant indications—relevant indications are indica-
When agreed upon between the manufacturer and purchaser,
tions which result from mechanical discontinuities. Only indi-
the liquid penetrant method may be used to verify the presence
cations whose major dimension exceeds ⁄16 in. [1.6 mm] shall
of surface discontinuities which had been previously indicated
be considered relevant.
by the magnetic particle method.
4. Ordering Information
6.3 Broad areas of fluorescence, pigmentation, or particle
accumulation which may mask indications of discontinuities
4.1 The inquiry and order should indicate the following
are unacceptable, and such areas will be cleaned and reexam-
information:
ined.
This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
7. Acceptance Criteria
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
A01.18 on Castings. 7.1 Individual relevant linear and nonlinear indications
Current edition approved Apr. 10, 1999. Published May 1999. Originally
exceeding the specified
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