English: Typical macrostructure of a cast ingot. The chill zone is on the outside, against the mold walls, then the columnar zone protruding from the chill zone to the equiaxed zone, and finally the equiaxed zone in the middle. For materials with wide solidification temperatures the top is concave due to shrinkage (as shown), but for materials with a narrow solidification temperature range the shrinkage takes the form of a pipe in the center of the ingot. The mold usually has a draft to ease the removal of the casting.