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  • Problems welding stainless

    I have some 1/16" stainless of unknown type. I tried tig welding it with 309L (all that I had) and it does not weld at all. Lots of porosity and does not even look like a weld. I then set up a lap joint and was able to make a nice weld without using any filler metal. I'm not a stainless welder but I sure would like to use this material. Any ideas of what filler metal I should try next?
    Last edited by Russellwh; 11-20-2015, 06:54 PM.

  • #2
    What type of joint were you attempting when had all those problems? Have any pictures of the trouble?

    Comment


    • #3
      I was trying to weld a butt joint using the filler metal. Lap joint with no filler metal welded just fine.

      Comment


      • #4
        http://www.weldingtipsandtricks.com/...ding-rods.html

        Link above to Jody's excellent website has some good suggestions for welding unknown stainless. Good luck!

        Comment


        • #5
          Were you using some sort of packing plate or back shielding? An improperly backed weldment on stainless, especially that thin, will cause you all sorts of problems. Also, try 312 stainless if you don't know the grade of stainless you have.

          Comment


          • #6
            Type of machine and settings...???

            sounds like maybe GAS problem.... are you running PURE Argon,,??

            is this possibly a multi-process machine that had been running C25 for steel MIG..??



            a remote possibility.....

            I recall a situation several years ago where a fella got a scrap piece of "Stainless".... that he could fuse by autogeneous TIG butt welding.... but it would go VERY bad if he tried to add filler.... drove him crazy....

            Well.... that scrap piece was not stainless after all.... it was Titanium...

            not likely your problem... but anything is possible
            Last edited by H80N; 11-21-2015, 07:24 AM.
            .

            *******************************************
            The more you know, The better you know, How little you know

            “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

            Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

            My Blue Stuff:
            Dynasty 350DX Tigrunner
            Dynasty 200DX
            Millermatic 350P w/25ft Alumapro & 30A
            Millermatic 200

            TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

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            • #7
              Well.....after I started looking at the plate, I could make out some markings. AMS-4901B No wonder I could not weld it. This is Titanium.

              Comment


              • #8
                Originally posted by Russellwh View Post
                Well.....after I started looking at the plate, I could make out some markings. AMS-4901B No wonder I could not weld it. This is Titanium.
                Life happens.... it doe look like stainless... a little grayer shine and it weighs a bunch less

                Glad you got it sorted out.....

                so what are ya gonna build with your Ti plate....???

                be aware.... that Ti is MURDER to cut... shape..... bend and form.... .... drive ya coco-puffs...
                Last edited by H80N; 11-21-2015, 10:35 AM.
                .

                *******************************************
                The more you know, The better you know, How little you know

                “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

                Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

                My Blue Stuff:
                Dynasty 350DX Tigrunner
                Dynasty 200DX
                Millermatic 350P w/25ft Alumapro & 30A
                Millermatic 200

                TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

                Comment


                • #9
                  Originally posted by H80N View Post


                  a remote possibility.....

                  I recall a situation several years ago where a fella got a scrap piece of "Stainless".... that he could fuse by autogeneous TIG butt welding.... but it would go VERY bad if he tried to add filler.... drove him crazy....

                  Well.... that scrap piece was not stainless after all.... it was Titanium...

                  not likely your problem... but anything is possible
                  Clever deduction.

                  Comment


                  • #10
                    FWIW......AWS 5.16 ERTi-5 Titanium TiG Welding rod.... goes for about $85 a pound... give or take....

                    Here is a good overview of Ti welding... follow this link

                    http://www.cousesteel.com/AndysPlace/TIGWeld.html

                    and....Click on "Titanium 101 TIG Welding"
                    Last edited by H80N; 11-22-2015, 10:51 AM.
                    .

                    *******************************************
                    The more you know, The better you know, How little you know

                    “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

                    Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

                    My Blue Stuff:
                    Dynasty 350DX Tigrunner
                    Dynasty 200DX
                    Millermatic 350P w/25ft Alumapro & 30A
                    Millermatic 200

                    TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

                    Comment

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