ASTM E ASTM E E — 02 The test methods provide for reporting of specic, distinctive information for each type of duplex grain size. And, as an alternative, the test methods offer a procedure for statistically determining the distribution of all the grain sizes present in a duplex grain size specimen. Signicance and Use 5. For comparison of mechanical properties with metallurgical features, or for specication purposes, it may be important to be able to characterize grain size in such materials.
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The test methods separate duplex grain sizes into one of two distinct classes, then into specific types within those classes, and provide systems for grain size characterization of each type. No other units of measurement are included in this standard. This standard does not purport to address all of the safety concerns associated with its use.
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ASTM E1181 - 02(2015)
Historical Version s - view previous versions of standard. More E For comparison of mechanical properties with metallurgical features, or for specification purposes, it may be important to be able to characterize grain size in such materials. Assigning an average grain size value to a duplex grain size specimen does not adequately characterize the appearance of that specimen, and may even misrepresent its appearance. For example, averaging two distinctly different grain sizes may result in reporting a size that does not actually exist anywhere in the specimen.
Standard Test Methods for Characterizing Duplex Grain Sizes