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  1. #1
    Join Date
    Apr 2013
    Posts
    2

    Default Filler rod for auto exhaust

    Hi, new here and still learning TIG basics. I'm having to modify a Magnaflow exhaust and from what I can find its either 409 or 436 SS. My local supply store only had ER 309L and ER 316L yesterday. I bought both and I also have some ER70S2. Can I weld this SS exhaust with any of the rods I have on hand. I made 1 joint on a spare pipe with the 70S2 and it seems ok but will it just crack in service? I don't want to use any of the SS filler if it won't work because it was $200.00 for the 2 grades and I want to return it if it won't work. Thanks!

  2. #2
    Join Date
    Oct 2012
    Location
    yuba city, CA
    Posts
    53

    Default and the part of the exhaust I need to modify is the _______???

    Quote Originally Posted by Route13 View Post
    Hi, new here and still learning TIG basics. I'm having to modify a Magnaflow exhaust and from what I can find its either 409 or 436 SS. My local supply store only had ER 309L and ER 316L yesterday. I bought both and I also have some ER70S2. Can I weld this SS exhaust with any of the rods I have on hand. I made 1 joint on a spare pipe with the 70S2 and it seems ok but will it just crack in service? I don't want to use any of the SS filler if it won't work because it was $200.00 for the 2 grades and I want to return it if it won't work. Thanks!
    .....and the part of the exhaust I need to modify is the _______???

    The more info you give, the more appropriate, some of the answers you'll get.

  3. #3
    Join Date
    Apr 2013
    Posts
    2

    Default

    I am just making butt joints on the pipe of the system. Until I can verify with magnaflow on Monday the best I can tell is it is either 409 or 436 stainless. I have found a few different articles that conflict with each other so I'm looking for someone who knows what will work and what won't.

  4. #4

    Default

    the 309 or the 316 will work. for the most part, any stainless wire will work. matching the alloys will give you a color match between the weld and you matrerial.

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