When welding Carbon steel to stainless steel, one should avoid formation of martensite by using overalloyed filler metal (309L) which will form Austenite even when cooling, a Preheating and using Temper bead technique would also be helpfull to reduce Hardness,
Consideration must be given to reduce High Dilution by reducing Travel Speed, buttering the joint face, no SAW etc.
Also refer to the Shaeffler Diagram to evaluate what kind of microstructue you would expect, with filler metal E309L, you can expect "Austenite with little ferrite".
Regards
Manpreet Singh
On Fri, 04 Feb 2011 13:18:26 +0530 "Vinod Kataria"
>
Hi,
How to control the hardness for NACE MR 0175 application if we have to use A-105 flanges on SS-316 Chamber as PWHT cannot be done.
With kind regards,
Vinod Kumar Kataria
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