Gents I am a plumbing contractor by trade so please excuse me if this is a bonehead DIY question but I need to know. I have a Millermatic 130XP and I want to weld "Pypes" brand SS exhaust piping (409 SS they tell me) . The project truck is frame off so I can tack weld and then remove sections to get it in posistions other than up-side-down for welding. The pipe is not thick* so am I right in looking for .023 diameter wire and what would the "Call-Out" be for the type of wire? I do not think I want a super hard material. I am kinda lost here so any help would be greatly appreciated, including where to buy it, and of coarse I only need a small roll. My research says I should use TriMix gas as well yes? I know i could use my standard wire but I do not want rust to show up.
* I will need to weld up header flanges so my system is modular and that is thick to thin material but most of the work is thin.
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09-16-2009, 04:03 PM #1Junior Member
- Join Date
- Jul 2009
409 SS Muffler Wire Recomendation
09-16-2009, 04:31 PM #2Senior Member
- Join Date
- Oct 2007
You can check around, but it is a "Type 409" filler metal for "Ferritic Stainless Steels."
Hope this helps
Dave"Bonne journe'e mes amis"
09-17-2009, 08:21 AM #3
I would just use 309L or mild steel, 309 is for weling stainless to steel but I have used it on 409 exhaust parts before just fine. You are not welding aircraft exhaust where someone would be concerned about the composition, I think your biggest concern is just not rusting right? As long as a complete sealed weld and not rusting are your concerns you would be find with a 309 or maybe even 308, L or non L.
409 is magnetic and has some iron already in it so unless polished you already stand a chance of getting little rust spots (so I have been told).
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