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    1. 09-26-2005 #1
      HotRod4PaPa
      HotRod4PaPa is offline New to Pro-Touring
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      welding stainless exhaust tubing

      I am new to tig welding, and have questions about welding 304 stainless exhaust tubing for a street rod exhaust system. What tungsten and filler rod should I use? I believe the tubing will be 14 or 16 gauge. I will be using a Miller 180SD. Can someone suggest an amperage setting? Is the stainless more difficult to weld than mild steel? If it is more difficult to weld, should I just go with mild steel and have it coated? I understand the stainless will run about double the coated mild steel exhaust system. Thanks

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    3. 09-26-2005 #2
      myclone
      myclone is offline Full Blown G-Machiner
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      Pretty informative posts about this here....\/
      https://www.pro-touring.com/forum/sh...highlight=weld
      https://www.pro-touring.com/forum/sh...highlight=weld
      Lots of info to be picked up here too (Ive learned a LOT just by reading/searching this site)...\/
      http://www.weldingweb.com/index.php
      GMC Syclone (currently wrecked thanks to the typical rubber headed VA driver not paying attention to his red stop light...oh and he didnt have insurance either)
      #614 11.9 @ 113
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    4. 09-26-2005 #3
      Matt@RFR's Avatar
      Matt@RFR
      Matt@RFR is offline Registered User
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      https://www.pro-touring.com/forum/sh...=stainless+tig

      https://www.pro-touring.com/forum/showthread.php?t=9333

      https://www.pro-touring.com/forum/showthread.php?t=3117

      https://www.pro-touring.com/forum/showthread.php?t=986

      https://www.pro-touring.com/forum/showthread.php?t=4412

      https://www.pro-touring.com/forum/showthread.php?t=3797

      https://www.pro-touring.com/forum/showthread.php?t=3285
      -Matt

      Welders: The only people that think a co-worker catching on fire is funny.
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    5. 09-26-2005 #4
      HotRod4PaPa
      HotRod4PaPa is offline New to Pro-Touring
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      Matt. Is "back purge" the process of filling the tubing with shielding gas while welding? Is this something you strongly recommend doing on stainless?
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    6. 09-26-2005 #5
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      Matt@RFR
      Matt@RFR is offline Registered User
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      Yessir. And remember that once the tube fills with argon, it still needs flow. Around 5cfh is fine.

      With stainless, Ti, Inconel, any of the Chrome Moly steels, aluminum...basically anything other than mild steel requires a back purge if the root will penetrate the backside of the joint.

      Also, remember that argon is heavier than air, so fill the tube from the bottom up, and also try to seal the inlet as best you can. The far end of the tube only needs an 1/8" hole in it.
      -Matt

      Welders: The only people that think a co-worker catching on fire is funny.
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    7. 09-26-2005 #6
      HotRod4PaPa
      HotRod4PaPa is offline New to Pro-Touring
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      Thanks for the help. I appreciated each reply. Great information!
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    8. 05-29-2006 #7
      FCRacing
      FCRacing is offline Registered User
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      Amps

      I just finished a set of SS headers in anouther guys shop using this exact welder (Shop Owner's)my setting for SS 18g was 18amps with purge, butt to butt no-rod on the 2.375 upper primarys and 2.500 lower primary (step header) with a 030 wire at the transition welds using 25amps............should work sweet for you.......Rhys FCRacing
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