Question

for an astm grain size of 8, approximately how many grains would there be per square inch at (a) a magnification of 100, and (b) without any magnification?

Answer 1

To find the number of grains per square inch at an ASTM grain size of 8, you divide the average grain size by the square of the magnification.

Step-by-step explanation:

To find the number of grains per square inch at an ASTM grain size of 8, you need to know the average grain size and the area being examined.

(a) At a magnification of 100, the average grain size is divided by the square of the magnification. So, if the average grain size is 8, there would be approximately 0.08 grains per square inch.

(b) Without any magnification, the number of grains per square inch would be equal to the average grain size, which is 8.