Code Case 2199-4
Code Case 2199-4
(OP)
We have fabricated a tube (T23) to header (P11) weld with the used of old WPS with a filler wire ER80S-B2. Since the release of code case 2199-4, new WPS was issued and the filler wire was changed to ER90S-B3.
What are the reasons of changing the filler wire from ER80S-B2 to ER90S-B3?
What are the reasons of changing the filler wire from ER80S-B2 to ER90S-B3?





RE: Code Case 2199-4
The use of filler metal with a properly qualified WPS has nothing to do with this code case revision. Someone decided that they wanted increased weld metal strength from the original 1.25% Cr-1/2% Mo weld metal to the 2.25%Cr - 1%Mo weld metal.
RE: Code Case 2199-4
I thought it was due to the molybdenum content of Er80s-B2 which is less than
the minimum amount of T23.