Rockwell scale
= Rockwell scale
{wiki=Rockwell_scale}
The Rockwell scale is a system for measuring the hardness of materials, typically metals and polymers. It determines hardness based on the depth of penetration of an indenter under a large load compared to the penetration made by a preload. The test is relatively quick and straightforward, making it one of the most widely used hardness testing methods. There are several Rockwell scales, identified by letters (e.g.