RE: [MW:31136] CS with Duplex SS (S31803) clad vessel PWHT?

Hi,

You can realize the dissimilar welding (CS 516 Gr.70) + Cladding (S31803) with PWHT following these steps:

-As the base metal of CS have 51 mm of thickness, apply preheating about 175 °C and maintain it during the welding.   Use filler for CS type E/7018 (depending welding process).

 

-Buttering the CS with austenitic filler metal (e.g., E/309L) and remove clad S31803 with grinding, 2" side and side of the weld joint. Realize localized PWHT over the weld metal and HAZ only, about 625 °C during one and half hours.

             - Weld the S31803 clad using duplex filler like E/2209.

 

Ramon Briceno

Senior Metallurgical Engineer / Oil & Gas

 

 

Sent from Mail for Windows 10

 

From: Materials & Welding
Sent: Saturday, July 11, 2020 6:42 AM
To: Materials & Welding
Subject: [MW:31131] CS with Duplex SS (S31803) clad vessel PWHT?

 

ASME Sec VIII div1

SA516 Gr 70 - 51mm thickness+S31803 clad

 

any experience on duplex clad vessel PWHT?

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