PWHT on Stainless steel to Carbon Steel Weld

[Shahil Saini]

Hello everyone,

Good Evening,

hope all are doing well,

As my subject indicates PWHT in SS to CS Weld joint, my question is what are the after effects if pwht performed in SS to CS joint??

In Addition, how to mitigate the after effects which occurred after pwht?

BM: SS 316L to SA516 Gr.70 

[Kannayeram Gnanapandithan]

CARBIDE FORMATION, tO AVOID, BUTTER CARBON STEEL WITH NICKEL BASE ELECTRODE LIKE NICRMO3 OR NICR3, CARRY OUT PWHT, AFTER THAT WELD WITH SS 316 WITH ABOVE SAID ROD

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE,  CSWIP 3.1,

ISO 9712 Level 2 in VT,

ASNT-Level II in PT,MT,RT & UT,

LA ISO 9001-2015,

International Welding Engineer. 

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

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[Parminder Singh]

Buttering of 516 Gr 70 with 309LMo, Then perform PWHT 

then Weld 316L to Buttered CS. 

On Wed, Jun 7, 2023 at 4:28 PM Shahil Saini <sainis...@gmail.com> wrote:

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[Kannayeram Gnanapandithan]

at cs pwht temp, carbide formation??

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[Vishwas Keskar Welding Manager WELDING]

Dear Shahil 

Pl furnish below information :

Why PWHT is required  ?

What is type of joint ?

What is PWHT Holding temperature and Holding time ?

Which type of filler metal that is planed to be used ?

What is service of the equipment ?Corrosive  or Elevated Temp.(If yes what is temp)

Thanks and regards

Vishwas - IWE International Welding Engineer