positions 6 and 7 mm from the tip for the specimens quenched with the field consisted of ;80 vol. %
pearlite. For specimens quenched without the field, 80 vol. % pearlite already occurred at the 4 mm
position and 100 vol. % pearlite occurred at the 5 mm position. The hardness measurements were in
accord with the microstructures. There was no detectable difference in the microstructure at the center
of the specimen compared to its perimeter (external surface)