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Thread: stainless structural welding

  1. #1
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    stainless structural welding

    hi, i'm looking to see if anyone knows of any types of stainless wire that is structurally rated for welding T304 ss you regular mild steel. any ideas? i haven't been able to find anything.

  2. #2
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    Re: stainless structural welding

    Stainless to carbon takes 309 wire.

  3. #3
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    Re: stainless structural welding

    but i don't think that's structurally rated though, is it?

  4. #4
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    Re: stainless structural welding

    They use it on high pressure pipe, why couldn't you use it on structural? What does that even mean, 'structurally rated'?


    https://www.lincolnelectric.com/en-u...al-detail.aspx

  5. #5
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    Re: stainless structural welding

    Quote Originally Posted by hunter111222 View Post
    but i don't think that's structurally rated though, is it?
    As long as it meets the requirements of the code you are working to.

    Our shop has a welding procedure for carbon steel to 304 using 309L wire. The procedure for 304 to 304 uses 308 filler wire. Here in at our shop (in Canada) we work to CSA W47.1 & W59.1 which is very similar to AWS D1.1.
    Red Seal Journeyman Welder (2003), Red Seal Journeyman Metal Fabricator (2018), Welding Engineering Technologist (2005)
    Pressure - ASME Section IX
    Structural - CSA W47.1, CSA W47.2
    Transport tanker - CSA B620
    Aerospace - AWS D17.1

  6. #6
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    Re: stainless structural welding

    Quote Originally Posted by TimmyTIG View Post
    Stainless to carbon takes 309 wire.
    Or ER312.

    ER312 has a high ferrite level like ER309 but is much more versatile for other applications. I gave up using 309 years ago because of cracking problems. As told by Lincoln electric ER312(the base for Harris SUPERMISSILEWELD), is a formula suited to weld steel to steel, steel to stainless steels, and stainless steels of unknown composition. ER312 is a staple in the maintenance weldor's tool box.
    Weld like a "WELDOR", not a wel-"DERR"
    MillerDynasty700DX,Dynasty350DX3ea,Dynasty200DX,Li ncolnSW2002ea.,MillerMatic350P,MillerMatic200w/spoolgun,MKCobraMig260,Lincoln SP-170T,PlasmaCam/Hypertherm1250,HFProTig4ea,MigMax1ea.

  7. #7
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    Re: stainless structural welding

    312 is not listed as a prequalified filler metal in AWS D1.6 . Use 309 unless the carbon content of the steel is greater than 0.3%, then use 312.
    Last edited by ironrail; 12-18-2019 at 01:07 AM.

  8. #8
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    Re: stainless structural welding

    Quote Originally Posted by ironrail View Post
    312 is not listed as a prequalified filler metal in AWS D1.6 .
    What about 310?

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