Post Weld Normalize
Post Weld Normalize
(OP)
Every so often, the idea of welding carbon steel castings(A216 WCB/WCC) in the as cast condition and normalizing after welding is brought up. My opinion is that doing so is a fool's errand at best. Castings have CE restricted to 0.41 max, process is GTAW with ER70S-2, 100% argon. My concerns are mainly base metal cracking during welding and severe reduction of the mechanical properties of the filler by normalizing (1700-1750 Air Cool) after welding. We won't even think about toughness. The relatively low CE should help with the cracking possibilities, but may not eliminate them. A change to ER70S-3 or 6 might improve the response to a normalize. Material is supposed to be NACE compliant as well and ASME IX and VIII are involved as well. My knowledge of the subject is apparently less than I give myself credit for, which is why I'm throwing it out to the forum for opinions.





RE: Post Weld Normalize
RE: Post Weld Normalize
In regards to the filler metal, I have experimented with normalizing ER70S-2 and found that the mechanicals drop into the 60-65KSI range vs the 70 ksi min. Base metal is also 70 ksi min. A change of filler metal has the possibility of resolving that issue. My preference would be to normalize, repair and perform a temper/pwht.
RE: Post Weld Normalize
A216 does not require normalizing after weld repair, only stress relief per 10.3 when the weld repair is of sufficient size. So why do it?
RE: Post Weld Normalize
RE: Post Weld Normalize