PWHT uses a technique that reduces or redistributes the Residual Stress formed by the welding Process by involving 4-step processes like Pre-Heating, Heating, Soaking & Cooling the Welded Surface to controlled temperatures for a specified amount of time. This enhances the properties of the welded surface.

1. Helps to improve the Metallurgical Structure.
2. Helps to improve the Ductility of the Material.
3. Reduces the risk of Brittle Fracture as the Ductility increases.
4. Relaxed Thermal Stress due to the redistribution of Residual Stresses.