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Re: [MW:14700] Dissimilar Welding: 5Cr-0.5Mo Furnace Tube with SS304 Guide pin

By Materials & Welding
Dear ali
as you mention in your mail welding with  5 cr  to ss304,ITS BASED ON THE design Temp.,i in this case you have to follow API 582 , COZ above 315 c you can not used 309 ,for that u should use f43, ER NiCr3

1 you have to do buttering on 5cr
2 pwht
3 ferrite test
4 welding

On Tue, Jun 26, 2012 at 1:31 PM, M. Ali Halai <mali5286@gmail.com> wrote:
Dear All,
 
We have to weld an Ø1½" SS 304 guide pin pipe to Ø4" 5Cr furnace tube. I was unable to find any WPS in our records. Some research I did revealed that I should be using SS 309 for the welding. What I am concerned is whether Stress relieving is necessary? I learned from somewhere that it will lead to sigma phase creation and carbide percipatation in austenitic stainless steel.
 
Your comments / help is much appreciated.
 
 
Regards,
 
Muhammad Ali

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