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Posted by stryped on April 28, 2008, 8:16 am
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Since this metal on the trailer tubing is only 3/16, should I weld it
with my Hobart Mig 135 with .30 wire and Argon/Co2 mix, or the same
welder with .35 flux core, or arc welder?
I am a newbie welder and was not sure what the advantages/
disadvantages are. (Other than with the wire and gas there is no flux
obviously). I guess it seems mig is a liitle easier but maybe not as
much penetration?
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Posted by Tim Wescott on April 28, 2008, 1:41 pm
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stryped wrote:
> Since this metal on the trailer tubing is only 3/16, should I weld it
> with my Hobart Mig 135 with .30 wire and Argon/Co2 mix, or the same
> welder with .35 flux core, or arc welder?
>
> I am a newbie welder and was not sure what the advantages/
> disadvantages are. (Other than with the wire and gas there is no flux
> obviously). I guess it seems mig is a liitle easier but maybe not as
> much penetration?
I would think that the difference is mostly personal.
Assuming that you're competent, you should be able to do a perfectly
good job with any of the methods you list.
Stick welding (they're all 'arc' welding) will make ugly welds and will
take the most time. In theory you can get away with dirtier metal with
stick welding but I always try to get things clean enough to solder
these days -- I screw up welds enough other ways, I don't need to screw
them up with dirt.
MIG welding will make the prettiest welds (assuming you're good), it'll
be fast, and penetration should be sufficient for a good weld (assuming
you're good).
I have just about no experience with flux core wire, but I assume it'll
be as fast as MIG welding and almost as pretty. You'll have to clean up
the flux afterward, though.
Perhaps you should make some test welds on some scrap, then decide which
method is best for _you_.
--
Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html
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Posted by Leo Lichtman on April 28, 2008, 3:06 pm
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"Tim Wescott" wrote: (clip) I have just about no experience with flux core
wire, but I assume it'll
> be as fast as MIG welding and almost as pretty. You'll have to clean up
> the flux afterward, though. (clip)
^^^^^^^^^^^^^^^^^^^^^
I use flux core a lot. If you are working outdoors, you have to worry about
breezes with gas shielding. Flux core runs a little hotter, which may help.
Cleaning the flux off is no problem--there isn;t much, and it isn't tightly
adhered.
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Posted by SteveB on April 28, 2008, 7:14 pm
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> Perhaps you should make some test welds on some scrap, then decide which
> method is best for _you_.
>
> --
>
> Tim Wescott
> Wescott Design Services
Thank you for posting what I consider one of the best pieces of advice ever
posted here. Kudos. A monkey can make a good looking MIG weld with a
couple of days training. Whether or not it will hold is another thing. I've
had lots of MIG stuff come apart, but they were ornamental metal and
decorative things, and not structural of over the road. On the surface they
looked fine, but underneath, they were not.
Good on you for your advice. For the OP, weld it up. Pull it, hammer it,
bend it, saw it in half through the weld. See what you got, and don't go by
looks alone. Consider FCAW as the polarity is different, and gets better
penetration.
Steve
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Posted by Tim Wescott on April 28, 2008, 7:18 pm
Please log in for more thread options SteveB wrote:
>
>> Perhaps you should make some test welds on some scrap, then decide which
>> method is best for _you_.
>>
>> --
>>
>> Tim Wescott
>> Wescott Design Services
>
> Thank you for posting what I consider one of the best pieces of advice ever
> posted here. Kudos. A monkey can make a good looking MIG weld with a
> couple of days training. Whether or not it will hold is another thing. I've
> had lots of MIG stuff come apart, but they were ornamental metal and
> decorative things, and not structural of over the road. On the surface they
> looked fine, but underneath, they were not.
>
> Good on you for your advice. For the OP, weld it up. Pull it, hammer it,
> bend it, saw it in half through the weld. See what you got, and don't go by
> looks alone. Consider FCAW as the polarity is different, and gets better
> penetration.
>
> Steve
>
>
Thanks for your addition -- I forgot the "test it" part.
I've worked with parts that are MIG welded and are very fine indeed --
but those came from experienced welders. If you have to ask, then at
least try it and test it.
--
Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html
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> with my Hobart Mig 135 with .30 wire and Argon/Co2 mix, or the same
> welder with .35 flux core, or arc welder?
>
> I am a newbie welder and was not sure what the advantages/
> disadvantages are. (Other than with the wire and gas there is no flux
> obviously). I guess it seems mig is a liitle easier but maybe not as
> much penetration?