Solve the below problems A paper clip is made of wire that i

Solve the below problems: A paper clip is made of wire that is 120mm long and 0.75 mm in diameter, with an ASTM grain size of 9. Calculate the number of grains in grain in the paper clip.

Solution

From Table, we find that a metal with an ASTM grain size of 9 has about 185,000 grains/mm3 . The volume of the paper clip is V = (/4)* ((0.75 mm)^2 )*(120 mm) = 53.0 (mm^3).

Multiplying the volume by the grains per cubic millimeter gives the number of grains in the paper clip as about 9.8 million.