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Re: [MW:35589] Clarification on WPS Applicability for SS316L to Duplex Welding per ASME Section IX

By Materials & Welding

If supplementary requirements for impact testing are applicable, a change in A-number will require new WPS qualification; however, if impact testing is not required, the existing WPS can be used as long as the P-Number and F-Number remain unchanged.

BR, 

Deerendra.. 



On Thu, 1 May, 2025, 18:57 Nambirajan Avudaiappan, <nambirajanavudaiappan@gmail.com> wrote:
Dear ranijith,
My question regarding the applicability of WPS only.

On Thu, 1 May 2025 at 14:03, Ranjit singh <ranjit450@gmail.com> wrote:
Dear sir,

We are facing problem in welding crack for desimilar metal like en19 hub dia 350mm thick 200mm and shaft en19 dia 140mm groove weld 28mm.

Process:- SMAW
Pre heating 200-250 degree.
Observation:- crack 

Regards,

Ranjit
9216671043

On Thu, May 1, 2025, 1:40 PM Nambirajan Avudaiappan <nambirajanavudaiappan@gmail.com> wrote:

Dear Experts,

I hope this message finds you well.

I would like to seek your clarification regarding the applicability of an existing WPS.

We have successfully qualified a WPS for welding SS316L to Super Duplex using ER2594 filler metal. Both base materials are classified under P-No. 8 to 10H, and the filler metal falls under F-No. 6.

However, our actual production requirement involves welding SS316L to Duplex Stainless Steel using ER2209, which also falls under F-No. 6, and the base metals remain under P-No. 8 to 10H.

As per ASME Section IX, since the base metal P-Numbers and filler metal F-Numbers remain unchanged, could you please confirm whether the existing WPS is valid for this application as well, or if a new qualification is required?

Thank you in advance for your guidance and support.

Regards,

Nambirajan A

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