[MW:8021] Re: Accelerated Cooling of A517-Gr.B and its Post-heating

Dear Sir,

Because A517-Gr.B is Chromium and Molybdenum alloyed material I should
say don't use accelerated cooling after stress relieving to avoid new
stress arises caused by this method. Better cool down in still air
till below 200°C. Post heating for this material is not really
necessary but you can use an insulation blanket for slowing down the
cooling rate after welding.

Best Regards

Herman Pieper

On 2 nov, 15:27, kianoosh zarrin naghsh <kzarrinnag...@yahoo.com>
wrote:
> Dear all,
>
> Can we do accelerated cooling by air a A517-Gr.B weldment from its stress relief
> temperature (540-590°C)? Is there any necessity for post-heating of A517-Gr.B after welding?
>  
> Thanks
>  
> Kianoush Zarrin naghsh

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