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  1. #11
    Join Date
    Mar 2007
    Location
    Deltaville, VA
    Posts
    2,239

    Default

    Denny,

    I've been welding SS in a marine environment for a "few years".

    Tri-mix can be a problem for the "hobby welder" because it's generally not available in smaller size bottles. That combined with the cost. I don't use that much, but I keep a 330 on hand for when I do need it. I've cut out/replaced too many SS welds that were done with other mixes to cut corners.

    When it comes to Ed Craig, I'd take what he posts with a grain of salt. I think, more than anything else, his propensity to go against "industry standards" is more to sell books/advice than it is to help the welding community. Much of his advice, based on my own personal experience, is flat out wrong.

    I personally cannot recommend an alternative mix/blend (covering gas) for SS, because I haven't used them myself. With the cost of the base material (SS), and the pre/post work involved with it, I just can't see cutting corners on gas.

    I sure wouldn't recommend anything else for an underwater application in salt water.

    With that said, I wouldn't be using mig to repair a cast SS shackle in the first place.
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  2. #12
    Join Date
    Jan 2007
    Location
    Delmont, PA
    Posts
    290

    Default

    Hey SundownIII,
    I agree with you. I simply refer to Ed Craigs' site for the youngsters/newbies to get an idea of the multitude of fillers & gasses that are available & some of the results of thir usage. Personally, I found the carbon content info of fillers quite valuable. There are superb books & literature available that I have & use from Miller, Lincoln, Alcoa, ESAB, & others & I have all of them marked with a yellow highlighter for pertinent info. I don't base all needs on just one source.... all sources can be challenged or be controversial to some. I also have & use tri-mix for certain applications as I'm sure you do. Most general hobbyists & smaller outfits never found a need for it because of the low usage & the size bottles the LWS furnish.

    Yup.... TIG would be the way to go.....

    Denny
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  3. #13
    Join Date
    Dec 2007
    Location
    Beech Island South Carolina
    Posts
    11

    Default lol

    First of all york you wouldn't use 309 on a sail boat it has a high content of carbon.He should use 316L and for the gas The tri mix is used on welding stainless. I got certs on welding pressure vessels R stamp U stamp we use tri mix gas.

  4. #14
    Join Date
    Sep 2005
    Location
    Warren PA
    Posts
    103

    Default

    with the price of helium expected to skyrocket in the near future, it might be beneficial to explore the use of a different mix for ss,

    As for Ed Craig, i found his site pretty informative. But I would have to agree with Sundown, you cant really trust a man with an agenda.

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