Rockwell Hardness Test The test is conducted by applying a minor force of 10 Kg using a diamond cone or a steel ball indenter on the surface of the material. The depth of indentation from this preliminary load is recorded and used as a reference point.
How does the Rockwell hardness test work?
The Rockwell hardness tester utilizes either a steel ball or a conical diamond known as a brale and indicates hardness by determining the depth of penetration of the indenter under a known load. This depth is relative to the position under a minor initial load; the corresponding hardness number is indicated on a dial.
What are the different types of scales in Rockwell hardness test?
There are three main types of hardness measurements: scratch, indentation, and rebound. Within each of these classes of measurement there are individual measurement scales.
How do you use a hardness tester?
A hardness test is typically performed by pressing a specifically dimensioned and loaded object (indenter) into the surface of the material you are testing. The hardness is determined by measuring the depth of indenter penetration or by measuring the size of the impression left by an indenter.