Welding mild steel exhaust piping with a mig welder got some questions.

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Old May 13, 2005 | 11:32 AM
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Default Welding mild steel exhaust piping with a mig welder got some questions.

Well I got a exhaust for my car but I need a flange, 5 hangers, and my muffler welded onto the piping. My friend has a mig welder not sure which one right off buts I do know that it is pretty decent. What are the best settings for welding this stuff up since I know nothing about welding really and so I can tell him so he doesnt mess my stuff up and it will actually turn out ok.

This probably sounds like a dumb question but he isnt the most experienced welder and Im not for sure and it doesnt seem like that hard of a project. Oh I also did a search but didnt come up with any good info.
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Old May 13, 2005 | 11:40 AM
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Default Re: Welding mild steel exhaust piping with a mig welder got some questions. (ringgold)

Would need to know what machine he has to help him out with specific 'settings'. Best bet is to get some metal of the same thickness and do some practice beads before hand. Also, some mig welders have charts inside of them with settings like - for 14 gauge metal use x" thick wire with feed at x and voltage at x.
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Old May 13, 2005 | 11:43 AM
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Default Re: Welding mild steel exhaust piping with a mig welder got some questions. (backpurge)

He has been doing some practice welds I know for sure but not sure what kind of metal he was using. Ill try to find out the name of the machine and post it up so maybe it can help determine what is gonna be the best settings. Thanks
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Old May 14, 2005 | 01:14 AM
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Default Re: Welding mild steel exhaust piping with a mig welder got some questions. (ringgold)

Oh by the way its a Miller 210 that we are gonna be welding with. I think tomorrow we actually got to go get some smaller wire because he is saying the stuff he has now in there is to thick and just burns holes through the exhaust piping. What size wire would you all recommend and will it be on that graph that is on the welder?
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Old May 14, 2005 | 10:08 AM
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Default Re: Welding mild steel exhaust piping with a mig welder got some questions. (ringgold)

I think he just needs to feel whats right for him, my welder has settings for thickness but last time I went off that, I felt that it was melting the piping to quick. I would buy some extra pipe and let him practice on it.

As far as the wire goes, I use .025 and never had issues with it.
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Old May 14, 2005 | 01:23 PM
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Default Re: Welding mild steel exhaust piping with a mig welder got some questions. (90blackcrx)

I think right now he has like .034 or .035 wire and it says in his book that for the guage piping that my exhaust is which is either 14 or 16 guage that wire will work and it gives some settings.
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Old May 16, 2005 | 12:47 PM
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Default Re: Welding mild steel exhaust piping with a mig welder got some questions. (ringgold)

is he running a shielding gas? .035 sounds like it's flux core wire and that would be a perfectly fine size to use. set the machine low on the amps and run some tests. look at the back of the metal after your test welds and see how wide the burns are on the metal this will give you a good gauge of how well the welds are cutting into the test piece. the wider the burn /discoloration, the better the cut. a narrow burn is a weak weld and a nd going to give you trouble. you'll know if you have too many amps running because as you know, it'll burn through.

g
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Old May 16, 2005 | 12:48 PM
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Default Re: Welding mild steel exhaust piping with a mig welder got some questions. (mini-driver)

Thanks for the info anyways but I got it welded up at an exhaust shop.
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