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Re: [MW:35980] Duplex WPS for Super Duplex

By Materials & Welding
Super Duplex have a Tensile strength of 115ksi whereas duplex have a Tensile strength of 95 ksi.

You cannot use a duplex PQR to weld super duplex SS though P.No/F.No/A.No(if used super duplex) are same but additional requirements like Corrosion test restricts them

Thanks & Regards

J.Gerald Jayakumar

0091-8838619635



On Monday, 2 February 2026 at 04:19:32 pm IST, Mohmmed Dudhiyawala <mdudhiya007@gmail.com> wrote:


DSS and SDSS are same group no. as per ASME IX. i.e. P10H G1

On Monday, December 15, 2025 at 10:05:44 PM UTC+5:30 syed kauser ahmed wrote:
As per ASME Section IX – QW-403.5:

No, a change from one Group Number to another Group Number within the same P-Number shall be considered an essential variable and requires requalification of the WPS.

On Mon, 15 Dec 2025, 16:29 Alex Kumar Antony, <alexk...@gmail.com> wrote:
Can we use Duplex WPS for Super Duplex, kindly quote with the help of code
Thanks

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