why Rockwell hardness is more preferred over Brinell hardness ? how Rockwell number is given(description of Rockwell test)

Question

Accepted Answer

Rockwell hardness is more preferred over Brinell hardness due to its higher accuracy, versatility, and ease of use.

Rockwell hardness provides a more accurate measurement of hardness compared to Brinell hardness.
Rockwell hardness is more versatile as it can be used for a wide range of materials, including both hard and soft metals.
The Rockwell test is easier to perform and requires less time compared to the Brinell test.
Rockwell hardness is expressed as a number on a scale, such as HRC or HRB, indicating the depth of penetration of an indenter into the material.
For example, a Rockwell hardness of HRC 60 indicates a harder material compared to HRC 40.

Accepted Answer

Different test scales were created to assist engineers in selecting the appropriate metals and hardness for their specific application.

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