mike:
actually, i don't remember, but i am pretty certain that the mixed gas
is used because it produces a better weld-not just because it is cheaper.
there was a whole big deal about how the weld globs form differently in the
presence of some co2. nevertheless, it is very helpful to know that argon
is satisfactory for both applications.
fred
06:43 PM 5/18/98 -0500, Mike Frerichs wrote:
>I may be wrong, but I suspect that the books you've read said to use the
mix for
>steel in order to save money. You may NEED argon for aluminum (I have no
aluminum
>welding experience) but it will also work just fine for steel. In fact, at the
>welding shop where I used to work (all steel welding) we normally used straight
>CO2, but the product that we made for one customer needed cleaner welds
with less
>spatter and that's when we would switch to either straight argon or 75/25
>argon/CO2. It produced better results, but was more expensive.
>
>Mike Frerichs
>maf@radiks.net
>
>Fred Zampa wrote:
>
>> scott: all the books i have seen say to use argon for aluminum but use the
>> mix for steel. this is too bad since it means two tanks and lots of
>> switching over. if you hear of a gas that works well for both metals, i
>> would like to know about it.
>> fred zampa
>>
>> At 02:32 PM 5/18/98 -0700, Scott Beckman wrote:
>> >
>> >Which makes a better shielding gas for a MIG welder, Argon-CO2 mix or
>>
>> straight
>> >CO2?
>> >
>> >BTW, my main purpose for the purchase of a MIG was to do autobody work.
Patch
>> >panels, floorboards, trunkpans, etc
>> >
>> >TIA,
>> >
>> >Scott
>> >
>> >
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