Welding AL6XN - is annealing needed if done with a filler metal?
Welding AL6XN - is annealing needed if done with a filler metal?
(OP)
Hello everyone,
We are currently experiencing chlorine corrosion issues on a lid to a piece of equipment in our plant. The lid is currently made out of 316L and the decision was made to make the lid out of AL6XN, but I have a few concerns about welding it.
I know that welding AL6XN can reduce its corrosion resistance and due to size of the lid (5' x 4.5' x 1/4") it is fairly impractical to have the lid annealed. Would using a c276 filler metal and not annealing the lid be enough to return the AL6XN to its pre-welded corrosion resistance? I have read a few papers on welding AL6XN, but am still unsure if AL6XN needs to be annealed after welding even if a high molybdenum filler metal is used.
Thanks a ton!
We are currently experiencing chlorine corrosion issues on a lid to a piece of equipment in our plant. The lid is currently made out of 316L and the decision was made to make the lid out of AL6XN, but I have a few concerns about welding it.
I know that welding AL6XN can reduce its corrosion resistance and due to size of the lid (5' x 4.5' x 1/4") it is fairly impractical to have the lid annealed. Would using a c276 filler metal and not annealing the lid be enough to return the AL6XN to its pre-welded corrosion resistance? I have read a few papers on welding AL6XN, but am still unsure if AL6XN needs to be annealed after welding even if a high molybdenum filler metal is used.
Thanks a ton!





RE: Welding AL6XN - is annealing needed if done with a filler metal?
RE: Welding AL6XN - is annealing needed if done with a filler metal?
RE: Welding AL6XN - is annealing needed if done with a filler metal?
Use 22 filler, and pickle to remove all heat tint, grinding isn't enough.
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Plymouth Tube
RE: Welding AL6XN - is annealing needed if done with a filler metal?
If you go that way though, Metajon's advice is sound and complete.