A medium well steak should have a hint of pink in the very middle of the steak. The surface should be a dark brown with good charring on the top and bottom. This steak will be very stiff but still have a little squish in the center.
Grill this steak over a high heat for one minute per side then, move to a medium heat for 5 to 6 additional minutes per side (depending on your grill).
This is the steak for the squeamish who don't want color in their meat. If you can sneak this one in for someone ordering Well you will be doing both of you a favor.