RE: [MW:20912] Welding of SS 304H to P-91

What is the best practice for the PWHT?
Shall we done the PWHT on P91 side near the HAZ only or weld metal of ERNiCr-3.

Thanks
Ghafor Mohamad
SQE Alstom

On May 28, 2014 7:50 PM, "Himan Nikdin" <himan.nikdin@outlook.com> wrote:

Based on AISI 304H chemical composition and it's position on Schaeffler diagram, using ENiCr-3 is best choice instead of ER309 bare wire.

Regards,

Himan Nikdin

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Date: Tue, 27 May 2014 04:12:10 -0700
From: bonjoe23@gmail.com
To: materials-welding@googlegroups.com
Subject: [MW:20892] Welding of SS 304H to P-91

Dear All

Kindly clarify the doubts:

Sir in Ethylene Cracker Furnace at one of the Petrochemical Plant, we have a hook-up between P-91 and SS304H. Here we are using ER309 as the filler.

Is it acceptable, if not what can be the probable problems associated with the filler selection and what are the solutions 

Regards

Arunabh

Engineers India Limited

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