1. An austenitized 60-mm-diameter 4140 long steel bar is quenched in agitated water. Predict the…

1. An austenitized 60-mm-diameter 4140 long steel bar is quenched in agitated water. Predict the Rockwell C hardness at (a) its surface and (b) its center. 2. An austenitized 80-mm-diameter 4340 steel bar is quenched in agitated water. Predict what the Rockwell C hardness of the bar will be at (a) its surface and (b) its center.