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[MW:2462] Re: Casting WPS/PQR

By Materials & Welding
Dear Abhijit,

I'm working for two days a week as a consultant at a foundry which
also cast this kind of materials for pump manufacturers. According to
the base material specification, in this case probably ASTM A351
refers to ASTM A488 for welding procedure / performance qualification.
For this specification the heat treatment is an esential variable so
they need to have a qualification including PWHT. An other issue is
the filler metal used. Most filler metal manufacturers don't execute
any testing for their filler metal after performing solution heat
treatment at 1070 - 1130 °C and I know from my expirience that some
materials don't meet the requirements after heat treatment at such
high temperature. I never faced any problems with filler metals for
Austenitic Stainless Steels such as CF8M after solution heat treatment
but for every PQR qualification specification adding and/or deleting
PWHT is an essential variable so I should say don't except it without
a coverning WPS/PQR.

Best regards

Herman Pieper

On 2 jun, 05:25, abbey kangale <abhian...@yahoo.com> wrote:
> Dear All
>  
> I have case for CF8M casting for Valves as per B16.34 which involves welding for internal cage fittment and ...
> Foudry has done welding and then they carryout subsequent Heat Treatment 1070Deg cel.to satisfy CF8M heat treatment requirement.
>  
> When we asked for WPS/PQR foundry has submitted WPS/PQR for welding without PWHT and PQR is qualified without Heat Treatment requirement and for which I had taken a objection .
>  
> Can Group advise my objection rersolution and corrective action as casting are ready for valve asssembly for our project
>  
> Abhijit
>
>       Own a website.Get an unlimited package.Pay next to nothing.*Go tohttp://in.business.yahoo.com/

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