Heat Treatment (PWHT)
Welcome to [NDT Inspection Portal]’s heat treatment (PWHT) group, a place for professionals to connect... View more
When do you need post weld heat treatment?
When do you need post weld heat treatment?
The need for PWHT is mostly due to the residual stresses and micro-structural changes that occur after welding has been completed. During the welding process, a high temperature gradient is experienced between the weld metal and the parent material. As the weld cools, residual stress is formed.
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