Traditional and new methods of hardness measurement are available. Deciding which one is right for an application depends on several factors.

Case hardening is done for many applications and many industries. It is a process used to achieve greater wear resistance and other important attributes. The depth of the case hardness produced by case hardening is important to the part’s performance, and measurement of the depth typically involves a labor-intensive process. This article reviews the typical measurement methods used and describes methods for case-depth measurement.