You are to design and produce a 2 inch thick steel wear plate for a rock-crushing unit. To avoid frequent replacement of the wear plate because of cracking or excessive plastic deformation, the hardness should exceed HRC 38 within 0.25 inches of the working surface. The center of the plate should have a hardness of no more than HRC 32 to ensure some toughness. You only have a water quench system available for controlling a quench cooling rate. Your job is to choose an appropriate steel, design the plate, and specify the necessary processing steps to satisfy the final plate mechanical properties (hardness).