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 1Likes
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1
Post By mickmate
06-23-2014, 07:17 AM
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CC Member
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Join Date: Sep 2002
Location: Milwaukee,
Wi
Cobra Make, Engine: Classic Roadsters, 95 EFI 5.0
Posts: 297
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Not Ranked
Mig weld a stainless steel o2 bung to mild steel header
Can I mig weld a stainless steel o2 bung to a mild steel header using a MIG welder using normal flux core wire?
Since I am a newbie, would it be much different that welding mild steel to mild steel? (I don't want to mess up the headers)
I have a 140 amp MIG with .35 core wire, .25 is available.
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06-23-2014, 07:23 AM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
Use a stainless wire to weld them together and you'll be good.
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06-23-2014, 07:56 AM
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CC Member
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Join Date: Sep 2002
Location: Milwaukee,
Wi
Cobra Make, Engine: Classic Roadsters, 95 EFI 5.0
Posts: 297
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Not Ranked
Ok, so I take it that I cannot use Flux core right?
If so getting the stainless steel wire (plus getting the gas/tank) would be pretty costly investment, I might be better off seeing if I can source someone to do it.
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06-23-2014, 08:05 AM
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CC Member
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Join Date: Apr 2006
Location: Charlottesville,
va
Cobra Make, Engine: Coombe, Shelby Block 496
Posts: 1,187
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Not Ranked
Hi
I would use a Tig with stainless wire, good luck.
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06-23-2014, 09:57 AM
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CC Member
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Join Date: Mar 2009
Location: Mendota,
IL
Cobra Make, Engine:
Posts: 697
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Not Ranked
Its just an ox sensor bung. Weld it with what you have. Both metals will somewhat mix with the weld. Get a small piece of stainless and weld it to some mild steel for practice and see how it reacts.
Mark
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06-23-2014, 04:58 PM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
That was going to be my next suggestion try welding some stainless to mild with what you have. Just don't leave what you stole from the kitchen lying around after.
The other suggestion is 035 308L FCO Gasless Stainless Steel MIG Welding Wire | eBay |
06-23-2014, 05:17 PM
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CC Member
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Join Date: Apr 2006
Location: Charlottesville,
va
Cobra Make, Engine: Coombe, Shelby Block 496
Posts: 1,187
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Not Ranked
If you have to buy stainless wire or have to pay some to do the job just buy a steel bung and weld away with your mig.
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06-23-2014, 06:15 PM
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CC Member
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Join Date: Dec 2011
Location: York Co. Maine USA,
ME
Cobra Make, Engine: ERA 427 S/C W/Holmon Moody Original Nascar build #508 Iron Block/heads (C5AE-H) Bal/Blu 427 Sideoiler; 780 Holley Dbl. Pump; 4 Speed Top Loader; AP Racing Bks; IRS; 15" Trigo pins
Posts: 391
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Not Ranked
I would styongly suggest that you use a tig welding setup & 309 welding wire to combine the SS to the carbon!!!! 309 wire is designed for joining to two metals together. It is the only sure way to do it rite.
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06-23-2014, 06:30 PM
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CC Member
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Join Date: Feb 2009
Posts: 1,695
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Not Ranked
Just weld it. You won't have any problem. We did it all the time when I worked in a muffler shop years ago.
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06-23-2014, 06:57 PM
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CC Member
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Join Date: Apr 2012
Location: Bay Area (Peninsula),
CA
Cobra Make, Engine: ERA 427, 427/487 side-oiler
Posts: 1,248
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Not Ranked
I agree with using TIG. You will get a cleaner result.
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06-23-2014, 09:11 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
Use tig exclusively and get a mild steel bung? Never look back........
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
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06-23-2014, 09:16 PM
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CC Member
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Join Date: Apr 2005
Location: Tucson,
AZ
Cobra Make, Engine:
Posts: 5,391
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Not Ranked
Nick, have you used that gasless wire? What did you think?
Larry
__________________
Alba gu brąth
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06-24-2014, 05:35 AM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
Smokey but it works well. Machine polarity has to be set for gasless wire or they don't work fer nothin.
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