Dear Ashfaq Anwer,

This system permit to measure the residual stress value in every point of weld surface ad for all metals type, allunimiun
give the residual stress in the metals than have had hardness treatment, but not the superficial hardnenig like induction tempering.or afther peening (only ...

More information about residual stress measurement NDT/NDE

The residual stress in a metal don’t depend from it hardness, but from the module of elasticity or Young module and from its chemical composition (density).
The hardness of a metal indicates its ability to absorb energy elastic, plastic or ...