[MW:1692] Re: hi

A welded joint, after performing the post weld heat treatment. main purpose of PWHT is to remove the resudial stresses generated during welding. PWHT temperature, time, heating rate, cooling rate depends on the material grade, nominal thickness also service condition, following the rules of code of construction. If the welded joint require PWHT, then the applicable welding procedure should also qualified with PWHT. after PWHT the mechanical properties and also the microstructure changes with respect to  as welded condition. the tensile & hardness values decreases but impact values increases.

 

Regards 

 

On 3/2/09, pubudu weerasekara <pubudu.weerasekara@gmail.com> wrote:

did u know what is the meaning of PWHT Condition can u explain it
if u feel free just send me mail

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