Standard: ASTM E664/E664M

STANDARD PRACTICE FOR THE MEASUREMENT OF THE APPARENT ATTENUATION OF LONGITUDINAL ULTRASONIC WAVES BY IMMERSION METHOD

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Scope:

This practice describes a procedure for measuring the apparent attenuation of ultrasound in materials or components with flat, parallel surfaces using conventional pulse-echo ultrasonic flaw detection equipment in which reflected indications are displayed in an A-scan presentation.

The measurement procedure is readily adaptable for the determination of relative attenuation between materials. For absolute (true) attenuation measurements, indicative of the intrinsic nature of the material, it is necessary to correct for specimen geometry, sound beam divergence, instrumentation, and procedural effects. These results can be obtained with more specialized ultrasonic equipment and techniques.

The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

 *A Summary of Changes section appears at the end of this standard

Organization: ASTM International
Document Number: astm e664/e664m
Publish Date: 2015-06-01
Page Count: 3
Change Type: COMPLETE REVISION
Available Languages: EN
DOD Adopted: NO
ANSI Approved: NO
Most Recent Revision: YES
Current Version: YES
Status: Active

Document History

Document # Change Type Update Date Revision Status
ASTM E664/E664M Change Type: STCH Update Date: 2010-06-01 Revision: 10 Status: INAC

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