Metallurgical Testing Labs is currently able to carry out the following hardness testing methods. It is noted that MTL is SANAS Accredited for these methods:
- Vickers hardness testing (HV) – 0.3kg, 0.5kg, 1kg, 3kg, 10kg load
- Brinnell Hardness Testing (HB) – 3000kg, 10mm ball and 750kg, 5mm ball
The illustrations on the left show examples of the types of hardness “indenters” used including the type of indentations that they leave behind. The hardness results are taken from measuring the average size of these indentations which when compared to the load used will give a hardness result. Naturally the harder the material is, the smaller the indentation will be given a constant load.
Rockwell testing is a little different as it measures the distance of penetration into the material, via a zeroed point. The greater the distance between the zero point and the tip of the indentation, the softer the material will be.