Post Weld Heat Treatment
Post-weld heat treatment has to be applied to some welded steels to ensure that the property of the weldment is suitable for the intended applications.
PWHT is high enough to allow residual stresses to be relieved quickly and to soften (temper) any hard regions in the HAZ.
The major benefits of reducing residual stresses and ensuring that the HAZ hardness is no too high for steels particular service applications are:
⦁ Improves the resistance of the joint to brittle fracture.
⦁ Improves the resistance of the joint to stress corrosion cracking.
⦁ Enables welded joints to be machined to accurate dimensional tolerances.
Because the main reason for and benefit of PWHT is to reduce residual stresses, PWHT is often called Stress-relief.
We do Post weld Heat Treatment both onsite and in-house facilities with most experienced Engineers with vast knowledge in various fields.