PWHT
Post Weld Heat Treatment
SERVICE INFORMATION
Post weld Heat Treatment(PWHT)
Post weld heat treatment has to be applied to some welded steels to ensure that the properties of the weldment are suitable for the intended applications.
The temperature at which PWHT is usually carried out well below the temperature where phrase changes can occur, but high enough to allow residual stresses to be relieved quickly and to soften(temper) any hard regions in the HAZ.
Note* There are circumstances when a welded joint may need to be normalized to retore HAZ toughness, these are relatively rare and it is necessary to ensure that welding consumables are carefully selected because normalizing will significantly reduce weld metal strength.
The major benefits of reducing residual stress and ensuring that the HAZ hardness is not too high for steels for 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.
OTHER SERVICES
BPMech with its team of highly experienced staff is able to offer the following specialized services. Here’s a summary of what we can offer
QUALITY GUARANTEE
Our board of directors has been deeply involved in the industries, with the most experienced director having 15 years of experience. Their wealth of knowledge and expertise endow BPMech with the advantage of project foresight, as we are able to identify and implement the most well-suited solutions for our clients.
OFFICE LINE
+60(6) 6336226
admin@bpmech.com.my
WORKING HOURS
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OFFICE LINE
+60(6) 6336226
admin@bpmech.com.my
WORKING HOURS