Tuesday, June 26, 2012

[MW:14691] Dissimilar Welding: 5Cr-0.5Mo Furnace Tube with SS304 Guide pin

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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