Mũi đo độ cứng kim cương, Rockwell, Đầu đo độ cứng HRC, HRB
Rockwell diamond indenter / penetrator is used for testing materials such as hardened steels and cemented carbides.
The Rockwell carbide ball penetrators, available with 1/16 inch, 1/8 inch, 1/4 inch, and 1/2 inch diameter, are used when testing materials such as steel-copper alloys, aluminum and plastics to name a few.
Brinell indenter is hardened carbide ball indenter with diameters of 10mm, 5mm, 2.5mm and 1mm.
The Vickers hardness with a diamond indenter, in the form of a right pyramid with a square base and an angle of 136 degrees between opposite faces subjected to a load of 1 to 100 kgf.
Knoop indenter is an extended pyramid with the length to width ratio being 7:1 and respective face angles are 172 degrees for the long edge and 130 degrees for the short edge.