Re: [MW:7206] Heat treatment Butt joint of SA-210 Gr.A1 and SA-312 TP 304H

Dear Sudharsan S,

 

This particular joint is one of the joint from the heat recovery steam generator (unfired) constructed as per ASME Section VIII Div.1. As per UW-2 (c) this particular steam generator needs to be heat treated.

Thickness involved 12.7 mm.

In my opinion there should not be any problem for the SS material like carbide precipitation.

Please suggest the heat cycle.

 

Thanks in advance.

Regards

Shinde

----- Original Message -----

From: sudharsan s

To: materials-welding@googlegroups.com

Sent: Sunday, September 26, 2010 1:55 PM

Subject: Re: [MW:7199] Heat treatment Butt joint of SA-210 Gr.A1 and SA-312 TP 304H

Shinde,

 

SA 210 Gr A1 is a seamless medium carbon (0.27% max) steel tubes. If you weld this to SA 312 TP 304H (18% Cr 8% Ni) with fully austenitic electrode like AWS E/ER 309LMo, from metallurgical point of view , there is no need for PWHT.

 

Can you just tell me why you need PWHT, is it from process point of view or for any other reason? What is the thickness as well.

 

On Fri, Sep 24, 2010 at 6:25 PM, agstes <agstes@gmail.com> wrote:

Dear All,

 

I want to know the post weld heat treatment procedure/cycle for the butt joint of SA-210 Gr.A1 (P1) and SA-312 TP 304H (P8).

 

Thanks in advance.

 

Shinde A.G.

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