We perform Post Weld Heat Treatment to retain material strength of the part after welding. By PWHT, one can control the hardness of the material and reduce the residual stress induced. Hence, after welding, one has to process the material through Post Weld Heat Treatment.
During the process, engineers ensure that the temperature does not drop below the specified degree. Apply the PWHT method for the part at temperature up to 316°C. PWHT avoids Weld failures, susceptible brittle fracture and high cracking potential.