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anis2502
Asked: 2021-04-17T10:07:41+05:30 In:

A steel has ASTM grain size number 6. What is the average number of grains per mm^2 and inch sq at 1x in the steel?

A steel has ASTM grain size number 6. What is the average number of grains per mm^2 and inch sq at 1x in the steel?
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    1. This answer was edited.

      n=6 And formula is N×(M/100)^2=2^n-1 N =number of grains per inch sq M=Magnification n=ASTM standard number Then at M=1x magnification, By using the above formula we get 320000grains/inch sq  and by using conversation 1 inch =25.4mm We get 496grains/mm sq                          

      n=6 And formula is N×(M/100)^2=2^n-1

      N =number of grains per inch sq

      M=Magnification

      n=ASTM standard number

      Then at M=1x magnification, By using the above formula we get 320000grains/inch sq  and by using conversation 1 inch =25.4mm We get 496grains/mm sq                          

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