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    ASTM E127 - 15

    Standard Practice for Fabrication and Control of Aluminum Alloy Ultrasonic Standard Reference Blocks

    Active Standard ASTM E127 | Developed by Subcommittee: E07.06

    Book of Standards Volume: 03.03


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    Significance and Use

    5.1 Reference blocks fabricated to this practice will exhibit specific area-amplitude and distance-amplitude relationships only with an immersion test at 5 MHz using the search unit, test instrument, and test parameters described in this practice. Comparison tests at other frequencies or with uncalibrated test systems will not necessarily give the same relationships shown in this practice.

    5.2 Although the primary ultrasonic evaluation of blocks is performed at a specified frequency, the blocks may be used to standardize ultrasonic tests at any frequency and with any pulse-echo ultrasonic test system. Establishment of distance-amplitude and area-amplitude characteristics is necessary for each application. This use may be inappropriate for other materials and curved surfaces without special compensation. Also see (3) for cautions regarding use of standard blocks for test standardization.

    1. Scope

    1.1 This practice covers a procedure for fabricating aluminum alloy ultrasonic standard reference blocks that can be used for assessing performance of ultrasonic testing equipment and for standardization and control of ultrasonic tests of aluminum alloy products using pulsed longitudinal waves introduced into test material either by the direct-contact method or by the immersion method. (1-18).2

    Note 1: Practice E428 and Guide E1158 also describe procedures for selecting material, fabricating blocks, and checking response.

    1.2 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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    E317 Practice for Evaluating Performance Characteristics of Ultrasonic Pulse-Echo Testing Instruments and Systems without the Use of Electronic Measurement Instruments

    E428 Practice for Fabrication and Control of Metal, Other than Aluminum, Reference Blocks Used in Ultrasonic Testing

    E1158 Guide for Material Selection and Fabrication of Reference Blocks for the Pulsed Longitudinal Wave Ultrasonic Testing of Metal and Metal Alloy Production Material

    E1316 Terminology for Nondestructive Examinations

    E1324 Guide for Measuring Some Electronic Characteristics of Ultrasonic Testing Instruments


    ICS Code

    ICS Number Code 77.040.01 (Testing of metals in general); 77.120.10 (Aluminium and aluminium alloys)

    UNSPSC Code

    UNSPSC Code


    Referencing This Standard

    DOI: 10.1520/E0127-15

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM E127-15, Standard Practice for Fabrication and Control of Aluminum Alloy Ultrasonic Standard Reference Blocks, ASTM International, West Conshohocken, PA, 2015, www.astm.org

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