ASTM A388/A388M-07

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Used in USNRC-RDT standards
Designation: A 388/A 388M – 07
Standard Practice for
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Ultrasonic Examination of Heavy Steel Forgings
This standard is issued under the fixed designationA 388/A 388M; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope* E 317 Practice for Evaluating Performance Characteristics
2 of Ultrasonic Pulse-Echo Testing Instruments and Systems
1.1 Thispractice coverstheexaminationproceduresforthe
without the Use of Electronic Measurement Instruments
contact, pulse-echo ultrasonic examination of heavy steel
E 428 Practice for Fabrication and Control of Metal, Other
forgings by the straight and angle-beam techniques. The
than Aluminum Reference, Blocks Used in Ultrasonic
straight beam techniques include utilization of the DGS (Dis-
Examination
tance Gain-Size) method. See Appendix X3.
E 1065 Guide for Evaluating Characteristics of Ultrasonic
1.2 This practice is to be used whenever the inquiry,
Search Units
contract, order, or specification states that forgings are to be
2.2 ANSI Standard:
subject to ultrasonic examination in accordance with Practice
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B 46.1 Surface Texture
A 388/A 388M.
2.3 Other Document:
1.3 The values stated in either SI units or inch-pound units
Recommended Practice for Nondestructive Personnel Quali-
are to be regarded separately as standard. The values stated in
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fication and Certification SNT-TC-1A, (1988 or later)
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
3. Terminology
values from the two systems may result in non-conformance
3.1 Definitions:
with the standard.
3.1.1 indication levels (clusters), n—five or more indica-
1.4 This specification and the applicable material specifica-
tions in a volume representing a 2-in. [50-mm] or smaller cube
tions are expressed in both inch-pound units and SI units.
in the forging.
However, unless the order specifies the applicable “M” speci-
3.1.2 individual indications, n—single indications showing
fication designation [SI units], the material shall be furnished
a decrease in amplitude as the search unit is moved in any
to inch-pound units.
direction from the position of maximum amplitude and which
1.5 This standard does not purport to address all of the
are too small to be considered traveling or planar.
safety concerns, if any, associated with its use. It is the
3.1.3 planar indications, n—indications shall be considered
responsibility of the user of this standard to establish appro-
continuous over a plane if they have a major axis greater than
priate safety and health practices and determine the applica-
1 in. [25 mm] or twice the major dimension of the transducer,
bility of regulatory limitations prior to use.
whichever is greater, and do not travel.
2. Referenced Documents 3.1.4 traveling indications, n—inductions whose leading
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edge moves a distance equivalent to 1 in. [25 mm] or more of
2.1 ASTM Standards:
metal depth with movement of the transducer over the surface
A 469/A 469M Specification for Vacuum-Treated Steel
of the forging.
Forgings for Generator Rotors
A 745/A 745M Practice for Ultrasonic Examination ofAus-
4. Ordering Information
tenitic Steel Forgings
4.1 When this practice is to be applied to an inquiry,
contract, or order, the purchaser shall so state and shall also
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This practice is under the jurisdiction of ASTM Committee A01 on Steel,
furnish the following information:
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
4.1.1 Designation number (including year date),
A01.06 on Steel Forgings and Billets.
4.1.2 Method of establishing the sensitivity in accordance
Current edition approved March 1, 2007. Published March 2007. Originally
with 8.2.2 and 8.3.3 (Vee- or rectangular-notch),
approved in 1955. Last previous edition approved in 2005 as A 388/A 388M – 05.
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For ASME Boiler and Pressure Vessel Code applications see related Specifi-
cation SA-388/SA-388M in Section II of that Code.
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contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 4th Floor, New York, NY 10036.
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Standards volume information, refer to the standard’s Document Summary page on Available from the American Society for Nondestructive Testing, 1711 Arlin-
the ASTM website. gate Ln., P.O. Box 28518, Columbus, OH 43228–0518.
*ASummary of Changes section appears at the end of this standard.
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