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Old 07-29-2009, 11:06 PM   #1
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Exhaust welding ?

Ok Well Im asking this in here b/c a lot of you guys do your own fab with exhaust n such. Just wondering what kind of wire I should use to weld exhaust piping? Deleting my hfc thats way down stream and hopefully what is holding me back. The last stuff we welded at my buddy's house rusted instantly almost. It might have just been cheap pipe but just wanna make sure.


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Old 07-29-2009, 11:15 PM   #2
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I use stick. 6010 the cap it with 7018
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Old 07-30-2009, 04:53 AM   #3
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Stick imo would be best, like he said a 6010 then cap with 7018. But if you havnt stick welded before it can be kinda tricky. Deff not as easy as mig.
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Old 07-30-2009, 07:09 AM   #4
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I would only mig the exhaust or better tig it but use some 304 stainless for your piping and some 308ss welding wire. also is your mig gas or flux core. or even better would be to Tig it.
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Old 07-30-2009, 07:12 AM   #5
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I didn't know how to weld worth a crap... buy a decent MIG with a gas connection for a little bottle of Argon. I wouldn't recommend using just a flux core for the beginner. Its too hard. Also, you need to know what your welding. Usually mild steel is easy enough. Stainless can get tricky plus you have to use a wire that is compatible with stainless in order for it to resist rust. Otherwise just primer over all your welds with a high temp primer.
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Old 07-30-2009, 01:13 PM   #6
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you can weld stainless with teh normal copper wire. i do it all the time at work. the rust will happen there faster cause it's tow metals being fused.even the stainless wire will rust quickly. its really not to worry though. if it is a good weld it wont rot through. if anything pul the exhaust and clean the welds with a wire wheels(and any other rusty bits) and paint it with some high temp paint. do 2 coats and thel re install it. that should be enough to keep the weather at bay for a few more years. (if you get all new stuff do this step before installing it on the car. that way it wont rust for quite a while)
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Old 07-30-2009, 07:04 PM   #7
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mig .030 or .035 wire flux or gas (pure argon or argon mix)
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Old 07-30-2009, 07:06 PM   #8
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I also mig my stuff, I normally use stainless wire (.030) and pure argon instead of argon mix.
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Old 07-30-2009, 07:25 PM   #9
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I also mig my stuff, I normally use stainless wire (.030) and pure argon instead of argon mix.
Pure argon is only used for mig welding aluminum. You should never use it to MIG steel or stainless.

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Originally Posted by pitchedblack04 View Post
Stick imo would be best, like he said a 6010 then cap with 7018. But if you havnt stick welded before it can be kinda tricky. Deff not as easy as mig.
Stick welding would definetly not be your best option for thin wall tubing. Geeze two passes! I really cannot believe someone would be able to stick weld 16g exhaust tubing and have it look decent.

I would suggest either TIG or MIG welding it with gas. As a last resort, flux core MIG weld it. Filler material will depend on your base metals.
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Old 07-30-2009, 07:27 PM   #10
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I've had good luck so far with the pure argon plus I dont have to switch bottles between stainless and Aluminum.
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