Width $=2\mathrm{.}584mm$

$44x$

NTS BSD EHT $=15\mathrm{.}00kV$

I Probe $=$

$50pA$

$WD=8\mathrm{.}05mm$

$200m$

Determine the average grain size $($in microns$)$ of the above image using the

MLI method, please note the scale bar on the image.

Once the average grain size has been measured in microns, report the ASTM

number for this material.