Standard Test Methods for Determining Average …

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Designation: E 112 96e3Standard Test Methods forDetermining Average Grain Size1This Standard is issued under the fixed designation E 112; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or Standard has been approved for use by agencies of the Department of Equations , and were editorially revised in April New numbers were assigned to the adjuncts in February Footnotes 4, 5 and 9 were editorially corrected and footnote 8 was editorially removed in May test Methods of determination of Average grain size in metallic materials are primarilymeasuring procedures and, because of their purely geometri

NAa = number of a grains per mm 2 at 1X in a two phase (constituent) microstructure. NAE = number of grains per inch 2 at 100X. NA, = NA on a longitudinally oriented surface for a non-equiaxed grain structure. N At = NA on a transversely oriented surface for a non-equiaxed grain structure. NAp = NA on a planar oriented surface for a non-equiaxed …