I did not check this article in the new ASME IX Ed. 2010. I guess this
was included after my query to the ASME commitee.
Best Regards.
On 7 ene, 11:51, "Bathula Raghuram (Mumbai - PIPING)"
<R.Bath...@ticb.com> wrote:
> Dear Mr Pedro Alvarez
>
> QW407.4 has been revised to include P10H, Please refer 2010 edition of ASME Sec IX, and maximum qualified thickness would be 27.5mm in your case.
>
> [cid:image003....@01CBAE86.F57D6E80]
>
> Best regards
>
> B. Raghuram
>
> -----Original Message-----
> From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Pedro Alvarez
> Sent: Friday, January 07, 2011 2:09 PM
> To: Materials & Welding
> Subject: [MW:0] Thickness qualification range for duplex SS with PWHT (ASME IX)
>
> Dear all,
>
> I have a enquiry concerning the base metal thickness qualification
>
> (ASME IX) range for a welding procedure of duplex stainless steel with
>
> solubilization PWHT. I tried to get a response from ASME, but I did
>
> not receive any answer.
>
> According to QW-250s tables PWHT, for many welding technologies the
>
> PWHT limits the maximum qualified thickness as per QW-407.4. This
>
> article says: "For ferrous base metals other than P-Nº 7, 8 and 45,
>
> when a procedure qualification test coupon receives a PWHT exceeding
>
> the upper transformation temperature, the maximum qualified base metal
>
> thickness, T, shall not exceed 1.1 times the thickness of test
>
> coupon".
>
> As far as I concerned, upper transformation temperature is Ac3
>
> (ferrite to austenite transformation while heating) for a ferritic-
>
> perlitic carbon steel.
>
> If I have a coupon of 25 mm thickness of Dupex SS and I apply a PWHT
>
> at 1100ºC + Water quenching, ¿what do you think should be the maximum
>
> qualified thickness range? 27.5 mm or 50 mm.
>
> Regards.
>
> Materials Science Ph.D Pedro Alvarez
>
> LORTEK - Joining Technologies Research Institute
>
> Spain
>
> Filtered by Hosted Filtering
>
>
>
> image003.png
> 34 KVerDescargar
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