Let's say I want to make something like this:
Unlike locost chassis, the joins will be exposed so ideally should look as nice as possbile, ideally without having to dress the welds afterwards.
Would a reasonably skilled MIG operator (i.e. me) be able to achieve a nice finish or would a TIG make it much easier to do that?
By nice I mean an even bead of weld without bubbles, lumps ofbits of wire poking out! 
The tube is mostly 32 mm x 3 mm wall ERW.
Either.............if you can weld!
TIG is generally neater, but requires very accurate cutting of the pipes where they join. If they are close enough, they can sometimes be tigged
without a filler rod.
Mig will look ok if you get your current settings low enough to penetrate, but not lay down a thick weld.
It just takes practice with either method.
My understanding is that TIG is quite slow so for a big chassis MIG has an advantage... Then again, TIG welds often look neater than MIG so I guess it's a time vs appearance type thing.
tig nice and neat allthough harder to do
Do you have the welding kit to do either or would you have to "sub-out" the TIG work?
IMHO...a nice looking MIG weld is not necceserily a strong one....
quote:
Originally posted by nick205
Do you have the welding kit to do either or would you have to "sub-out" the TIG work?
quote:
Originally posted by tegwin
IMHO...a nice looking MIG weld is not necceserily a strong one....
Generally good welds never break........the material around them gives way first.
as said at the top, "either, if you can weld"
it makes no odds, either will do, though TIG will take much longer
this is my homemade blackbird top engine brace,like mentined before take your time to get your joints nice and tight and you'll pi** it
Rescued attachment DSCN1602.JPG
steady as she goes
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all painted up
Rescued attachment DSCN1710.JPG
nice welds and avatar.
that is TIG welding innit?
quote:
Originally posted by 02GF74
nice welds and avatar.
that is TIG welding innit?