Untwinned Grain Reticle (1-8) Use with a 10x objective
Methods for determining the average grain size
ASTM METHODS E 112 PCN 12-501120-10
Plate 1 b Untwinned Grains (Flat Etch) 100x
||0.010" – 0.020"
||2 waves or better
||1.5mm ± 0.2mm
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