TIG & The Stack-O-Dimes Question

I've been TIG welding for a few years now. My welding is done in a home
shop/hobby situation. I've had no formal welding edu-ma-cation at all
except a few hours spent with Ernie (we live within driving distance). Given
the previous statement, I risk asking a "stupid question".
What is the reason for the "stack of dimes" look for TIG welding. I know how
it is made, what I mean is, why? Is there a reason why the S-O-D is a better
weld.. I've often TIG welded a fillet weld by just laying the filler rod
into the V and heating with the TIG torch. Or a butt joint without any
filler rod at all. My limited experience tends to believe that the resulting
weld is just as strong. Fill me in please.
Lane
Reply to
lane
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More than anything it is pleasing to the eye as well as being strong. Most times it is done in a pulsing environment. Walking the cup takes more finesse and takes well more energy from you to do it than the pulsing SOD look. I attempt to have the SOD while capping on pipelines providing I have the time.
And by the way......there are no stupid questions if you learn from it. IMO
-- "Pay peanuts.....expect monkeys."
Reply to
jessp
You can get the effect 2 ways. From a regular addition of filler metal, and from a pulsed weld.
Either way it is simply giving you a visual clue as to how consistent the metal is beneath the weld.
A smaller consistent weld is often stronger than a larger inconsistent weld.
Inconsistencies in a weld lead to stress risers, and a stress riser is where a weld will fail.
For decorative work I sometimes wash a weld smooth, but I would always prefer to leave the weld rippled to show how consistent and even the weld was.
You can make a weld and then grind it smooth or wash the torch over it to smooth it. Either way what is below is now a complete mystery. I find the better a welder gets the less likely he is to smooth a weld out.
There is pride is a good bead.
Reply to
Ernie Leimkuhler
Ernie Leimkuhler wrote in news:301120032041072830% snipped-for-privacy@stagesmith.com:
My limited
I've always wondered about this as well.
Whether, particularly on fancy aluminum diamond plate, the SOD actually adds anything besides *looks*, (like stress). Maybe it isn't a really big problem.
Reply to
Greg M
The last time I asked this question I was told that the SOD look made for a weaker weld than was possible. The SOD look was started (or so I was told) by pipeline welders as a cap to the weld. They held the stick nearly parallel to the weld to get little penetration.
J
Reply to
James Arnold
As long as the bottom pit or whatever you want to call it is 1/16" above pipe wall there should not be any problem with strength. I have never had an inspector tell me I could not use this particular capping process.
Reply to
jessp

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