On Mon, 28 Jun 2010 17:15:04 -0500, "RogerN"
wrote:


"Gunner Asch" wrote in message
.. .
On Mon, 28 Jun 2010 00:33:19 -0500, Don Foreman
wrote:

On Sun, 27 Jun 2010 10:57:06 -0700, Gunner Asch
wrote:

On Sun, 27 Jun 2010 08:45:07 -0500, "RogerN" wrote:

I'm getting close to cutting out rust and installing panels. I have a
Century wire feed welder, MIG and flux-core, will flux core work for
auto
body? I'm wondering since I don't use this very much I took my cylinder
back instead of paying monthly rental. I can do a cylinder lease if
necessary but if Flux core wire will work for auto body repairs then I
can
save some money.

Roger...mig works nicely with CO2. Im sure you can snag a small Co2
bottle someplace. I get em for little or nothing. Liquid CO2 costs
damned little, and a bottle will last for literally hundreds and
hundreds of hours of mig welding. A 20lb bottle can be had for less
than $50..often far far less..and they are cheap to fill and last a very
long time.

It should be noted that Co2 bottles are falling out of favor in bars,
soda shops and whatnot as newer tech is employed..and there are
literally Millions of them out there.

Just a heads up.

As far as welding with CO2..it does a really nice job, though the welds
are not always as pretty as C25 or straight argon..they are as good or
better than flux core, and actually make the machine "hotter" so you can
weld at a lower power rating. And there is litle or no "clean up" after
welding.

Gunner

I've not used straight CO2 so I won't knock it, but "hotter" is not a
feature when welding 24-gage steel.

But you can indeed turn it down to the next lower range in most
cases...giving you plenty of welding ability and for cheap. But yes..C25
may be better if you have it. Trimix would work as well. But..its pricey


When considering the time spent and cost of good materials (paint,
etc) for a decent job, the cost of Ag25 mix is completely
insignificant, probably less than the cost of electricity to run the
compressor doing all the sanding and grinding.

Your advice is noted.

Thanks!

Gunner


What is the ultimate? Perhaps auto bodies should only be welded 5032.1 feet
deep in fresh water at a temperature of 72.549 degrees F with a certain PH?
Didn't work, what kind of hat were you wearing? Ok, I'm being ridiculous,
but like you say, if CO2 is hotter then perhaps you can turn the amps down,
or maybe the flow up, or have it cooled otherwise... I dunno, but I doubt
that the best method is any more than someone's trial and error that they
had success with.

RogerN

I suppose you could spray paint by filling your cheeks with paint and
then sneezing.

Trial and error tends to produce best results with a method that has
technical advantage for one reason or another. That isn't to say
that acceptable results can't be obtained with alternative methods.

I have visited a number of restoration shops and body shops. They all
run Ag25, none that I've seen run straight CO2.