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Welding Stainless

Discussion in 'The Hokey Ass Message Board' started by N8B, Feb 24, 2010.

  1. N8B
    Joined: Sep 28, 2009
    Posts: 476


    I have a question regarding stainless filler rod.
    We have a fold up pan and I need to TIG the corners for a dressed edge.
    What is the best filler rod to use so I dont get any dicscoloration after dressing.
    The parent metal is 18 guage #4 stainless.

    Thanks in advance.
  2. ocfab
    Joined: Dec 26, 2007
    Posts: 678


    I use 309-LSI on 304 stainless. i'm not sure what stainless you are welding
  3. do you mean 304? SS
  4. Nitrosquid
    Joined: Jun 1, 2006
    Posts: 65


    Pickling paste will clean it right up. Should be available at the welding supply store.

  5. okie-mopar
    Joined: Aug 3, 2008
    Posts: 23


    304 is welded with 308. the color you get in the heat affected zone can be buffed off with a stainless wire brush or wire wheel on a grinder.
  6. 1320/150
    Joined: Oct 9, 2009
    Posts: 647


    #4 is the polish. #4 has a grain (looks like a centerline wheel,or most countretops! 2b is the natural finish. #8 is a mirror finish!!
  7. N8B
    Joined: Sep 28, 2009
    Posts: 476


    Yeah sorry wasn't clear on that.
    1320/150 is right; We will end up with a #4 brush finish.

    Thanks for the input guys.
  8. You still haven't indicated which alloy of stainless you're using? 304/316/409/etc. Ideally you'd match the rod alloy to the base material, but you can get away with using 308 on pretty much all stainless.
  9. Tank
    Joined: Nov 8, 2002
    Posts: 749


    I use 308 & 316 at the shop all the time as filler. The rainbow, and discoloration usually polishes right out with red scotchbrite.
  10. demented
    Joined: Aug 17, 2005
    Posts: 49

    from Sweden

    <SCRIPT type=text/javascript> vbmenu_register("postmenu_4949044", true); </SCRIPT>
    Chickenridgerods is right, as a stainless steel welder we use the same or a higher number then the material is (it goes for all metals).
    If it´s 304 ss,you use 304 or 308/316. 316, is what I use 99% of the time.
    When you polish it, it can be a little tone diference if you use 316 filler on 304 SS (yes SS means stainless) material, but not like on aluminum.

    BUT!! A lott of people are obsessed about TIG welding.
    But if you ask any welder who worked with stainless steel for a long time witch method they would use, I´m pretty sure ALL of them would say "use a 316 stick" wich is the best looking , chepest, and easiest method ( you still have to practice!!!).
    And when I think about it, I have never seen any difference in tones when I use a stick welding machine.

    Good luck, Demented.ubbe
  11. strike a poser
    Joined: May 23, 2007
    Posts: 399

    strike a poser
    from Salinas,CA

    I would just run a fusion bead at the corner w/o fill rod and clean up with a wire brush. If you run a tight bead it will provide a nice radiused corner and look the best with a #4 finish. That way you dont have to match the grain on the rest of the sheet. I do this all the time with gaurds and covers at work.
  12. Chevy Gasser
    Joined: Jan 23, 2007
    Posts: 701

    Chevy Gasser

    SS is easy to weld with oxy/acetylene just adjust the flame with a little extra oxygen that leaves about a 1 1/2" feather on the flame, it flows like butter. I have cut SS trim into strips and used that as filler.
  13. 1320/150
    Joined: Oct 9, 2009
    Posts: 647


    Remember when you notch to leave a metal thickness. For example on 16 gauge 1 inch flange. Notch one side at 15/16,and the other 1 inch. When you bend them both at 1 inch the gap will be tighter!!! much easier to fuse..
  14. rick goetz
    Joined: Mar 6, 2007
    Posts: 94

    rick goetz

    Wait a minute fellows. Stainless steel is strictly prohibited on the HAMB. Rusty metal only.
  15. 1320/150
    Joined: Oct 9, 2009
    Posts: 647


    wait a minute!!! 3/4 of all the trim on these cars are stainless steel!!!
  16. tommythecat79
    Joined: Jan 3, 2010
    Posts: 250


    308 with pickling paste, and if you can get an argon shield on both sides of the weld that will help too.

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