What are destructive test in welding ?

1. the presence of a notch in the metal,
2. the temperature of the metal, and
3. the residual

4. Hardness test

The hardness of a weld is the ability to resist indentation or penetration by the point of a material that is harder than the weld being tested.

The hardness test is required to confirm whether or not the weld is hard enough to resist mechanical wearing, or whether or not the weld is ductile enough to stresses, depending on the usage of the weldment.

 Four different methods of measuring hardness are in use depending upon the requirement: Brinell, Rockwell, Vickers, and Shore hardness.

In particular, Vickers hardness is most suitable to measure the hardness distribution in a weld.