ASTM WK25749

    New Test Methods for Measuring Layered Materials Using Optical Microscopy of Cross-Sectional Samples

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    Developed by Subcommittee: E04.14 | Committee E04 | Contact Staff Manager


    1. Scope

    1.1 These test methods cover quantitative measurement of layer thicknesses of multilayered materials using microscopy. 1.2 These test methods are suitable for use on flat sheet, strip, or web of layered materials having nearly parallel layers capable of being cross sectioned and distinguished by microscopy. 1.3 These test methods are not intended for use on irregular shapes, formed or embossed materials, or any materials in which surface irregularities may be greater than layer thickness or in which a single direction normal to the layer interfaces would be poorly defined. 1.3.1 These test methods may be used in cases in which a generalization would allow for a well-defined method, for example, in tubing substituting concentric layers for parallel layers. 1.4 UnitsThe values stated in SI units and percent of product thickness are to be regarded as the standard. The referee procedure will report percentages only. 1.5 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. 1.6 This standard does not purport to address all the concerns necessary to guarantee quality in the measured product. It is expected that knowledge of the manufacturing process and its variation be used in selecting sample sites and applicable procedures when used for quality control purposes.


    alclad strip; brazing sheet; clad; coating; layer; sheet; web

    The title and scope are in draft form and are under development within this ASTM Committee.

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    Work Item Status

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    Draft Under Development