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Stainless steel will be the death of me

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  • H80N
    replied
    Tri Mix... Which Tri Mix...???

    Originally posted by big mike View Post
    Argon, CO2, oxygen has more CO2 than is normally recommended for stainless(below 5%)
    There are a whole bunch of gas mix recipes.... we won't know which one till he tells us...

    if we look at the cross reference and selection manual... the selection is formidable...

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  • big mike
    replied
    Argon, CO2, oxygen has more CO2 than is normally recommended for stainless(below 5%)

    Leave a comment:


  • H80N
    replied
    Here is the shielding gas cross reference to sort out those zillions of catchy tradenames and figure out the actual gas composition of these mixes...

    http://www.aoc.com.mx/biblioteca/tab...PROTECCION.pdf

    Leave a comment:


  • H80N
    replied
    Originally posted by big mike View Post
    "Gas is tri-mix."
    Argon, CO2, oxygen or helium, argon, CO2?
    There is some controversy on what is the best gas mix for MIG on stainless...

    Here is an old tread on it..

    http://www.millerwelds.com/resources...el-MIG-welding

    And here is the Praxair gas selection manual...

    http://www.prest-o-sales.com/other_l...n%20Manual.pdf

    Also...I do hope that you are NOT trying to use the AUTOSET feature on stainless...

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  • big mike
    replied
    "Gas is tri-mix."
    Argon, CO2, oxygen or helium, argon, CO2?

    Leave a comment:


  • Cgotto6
    replied
    Do you have welding experience? Do you have pictures of the welds? As others have said, .030 would probably be better suited to your material.

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  • cruizer
    replied
    023 is for floor pans, so real thin. How thick is the rake rail?

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  • H80N
    replied
    Pics of the welds would be helpful....

    BTW .023 is usually used for thinner stuff... like 12 Ga and smaller
    Last edited by H80N; 10-28-2014, 03:57 PM.

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  • Type
    replied
    I've never done any stainless steel work but the shop next door tig welded tons of stainless steel railing not too long ago. I beleive he built small sections then bolt them together somehow. I may be mistaken.

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  • dmanwithwelds
    started a topic Stainless steel will be the death of me

    Stainless steel will be the death of me

    I have been trying to weld together a stainless steel rail and in 3 days I have 20 ft out of 240 foot done. My setup is millermatic 211 Auto set with MVP wire is ER308L size 0.023. In 11 lb spool. Gas is tri-mix. I am having the hardest time keeping the rail straight and at the angle since it is a rake rail. All the welds are coming out really bad and it is going to need some serious finish work. I don't know what grade ss it is but it is sch 40 size and bends. I also have a millermatic 350p that I could use with the spool gun if that would make a better looking weld. I need some help with this one guys, I love welding but not lately. Any tips or xp with ss would help
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