Rockwell hardness testing
A. Steel ball
B. Steel ball or diamond shape
C. Pyramidal diamond
B. Steel ball or diamond shape
Brinell hardness test
A. Steel ball
B. Steel ball or Dimond
C. A pyramid diamond
A. Steel ball
Vickers hardest test
A. Steel ball or diamond
B. Diamond
C. Steel ball
B. Diamond
Knoop hardness testing
A. Steel ball or Diamond
B. A pyramidal diamond
C. Steel ball
B. A pyramidal diamond