Technique question

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Technique question SteveB 06-10-2008
Posted by SteveB on June 10, 2008, 12:41 pm
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I am going to weld a 3" x 3" X .120" square tube on to a 12" square by 3/8"
baseplate. I want good strength as these will be the posts for an awning.
Would you use 7018 or 7024 rod and keep the puddle on the plate, letting a
small portion of the puddle flow to the tubing? I have done this before
with 6010 and 6011 rod, but want something that will look better, yet not so
hot or large a puddle that it melts the tubing. Anyone done this?

Steve

--
"...the man who really counts in the world is the doer, not the mere
critic-the man who actually does the work, even if roughly and imperfectly,
not the man who only talks or writes about how it ought to be done."
Theodore Roosevelt 1891



Posted by Ignoramus13673 on June 10, 2008, 11:12 am
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> I am going to weld a 3" x 3" X .120" square tube on to a 12" square by 3/8"
> baseplate. I want good strength as these will be the posts for an awning.
> Would you use 7018 or 7024 rod and keep the puddle on the plate, letting a
> small portion of the puddle flow to the tubing? I have done this before
> with 6010 and 6011 rod, but want something that will look better, yet not so
> hot or large a puddle that it melts the tubing. Anyone done this?

I would use 7018 or 7024 rod and keep the puddle on the plate,
letting a small portion of the puddle flow to the tubing. I would also
use 3/16" or bigger gussets.

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Posted by RoyJ on June 10, 2008, 6:16 pm
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Any filet over 3/13" is not adding any strength to the assembly. Just do
as you suggested, aim the puddle at the plate to insure good penetration
there, let the weld puddle form up against the tube. You will find it
difficult to get a fully symmetrical looking fillet, the tubing is too
thin in comparison to the tube to allow that.

SteveB wrote:
> I am going to weld a 3" x 3" X .120" square tube on to a 12" square by 3/8"
> baseplate. I want good strength as these will be the posts for an awning.
> Would you use 7018 or 7024 rod and keep the puddle on the plate, letting a
> small portion of the puddle flow to the tubing? I have done this before
> with 6010 and 6011 rod, but want something that will look better, yet not so
> hot or large a puddle that it melts the tubing. Anyone done this?
>
> Steve
>

Posted by on June 21, 2008, 5:17 am
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> I am going to weld a 3" x 3" X .120" square tube on to a 12" square by 3/=
8"
> baseplate. =A0I want good strength as these will be the posts for an awni=
ng.
> Would you use 7018 or 7024 rod and keep the puddle on the plate, letting =
a
> small portion of the puddle flow to the tubing? =A0I have done this befor=
e
> with 6010 and 6011 rod, but want something that will look better, yet not=
so
> hot or large a puddle that it melts the tubing. =A0Anyone done this?
>
> Steve
>
> --
> "...the man who really counts in the world is the doer, not the mere
> critic-the man who actually does the work, even if roughly and imperfectl=
y,
> not the man who only talks or writes about how it ought to be done."
> Theodore Roosevelt 1891

i would use a high heat setting and do as you said with the most of
the weld pool on the thick plate and a little on the pipe, but i would
then turn the welder down a bit and layer a second weld on top of your
first with 50% on the pipe and 50% on the other weld.

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