Rockwell scale
ROCKWELL SCALE
In the field of materials science, there are various ways to define hardness. When using the Rockwell scale, a slight load is applied, followed by a major load, and the hardness value is then noted directly from a dial. Its main benefit is that it can display hardness values directly, eliminating the need for the time-consuming calculations required by other hardness measurement systems. Additionally, the setup is rather cheap and straightforward, allowing for installation in college laboratories.
The “B” and “C” scales are two alternate scales that are most frequently employed. Both use a random, dimensionless number to describe hardness.
Softer materials are categorized on the B-scale (such as aluminum, brass, and softer steels). It uses a 100kg weight and a hardened steel ball as the indenter to get a value that is expressed as “HRB.”
For tougher materials, the C-scale uses a diamond cone called a Brale indenter and a 150 kg weight to get a value that is represented as “HRC.”
A scale is used to convert the depth of penetration, and a harder substance yields a greater value.Case-hardened specimens can be measured on specific scales.
Video 01: Rockwell Hardness test
Other Useful Resources
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