Determine the ASTM grain-size number of the type 430 stainless steel micrograph shown in Fig. P4.44.

Determine the ASTM grain-size number of the type 430 stainless steel micrograph shown in Fig. P4.44. This micrograph is at 200×. Classify the grain size according to the value of n, that is, coarse, medium, fine, or ultrafine grain size. Measure the area of the image for your calculations.