PWHT (S355+Martensitic steel)

  • PWHT (S355+Martensitic steel)

    Posted by leo on 27/11/2021 at 7:53 pm

    We should weld S355 material with martensitic stainless steel sheets of thickness between 10 and 30mm.
    Next we should submit the structure to the PWHT.
    What kind of cycle should we do? For martensitic steel the temperature is more high than the S355, so I think is not possibile do a standard cycle. And what about a fragile areas and high hardness on the martensitic steel?

    Thanks

    caleb charles replied 7 months, 1 week ago 2 Members · 1 Reply
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  • Heat Treatment (PWHT)

    caleb charles

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    28/11/2021 at 4:27 pm
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    it’s important to know – at least- this kind of information. 1) grade of stainless steel ( i.e. martensitic or PH martensitic )- 2) autogenous welding or welding by filler 3) which kind of filler 4) kind of welding and its geometry . These are minimum info in order to understand which kind o PWHT have to be applied.
    Considering that there is a dilution in FZ between a carbon steel such as S355 and martensitic SS or PH , HAZ could cause some risk of stress cracks due to martensitc or retained austenit tranformation . This could involved not only the kind of PWHT but -in addition- the choice of NDT method in terms of UT and MT parameters. Therefore, more info about welding process could be useful in order to give you some suggestion

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