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  1. #1
    Join Date
    Apr 2007
    Location
    Ventura, California
    Posts
    102

    Default Does MIG stainless fluxcore need gas too?

    I know that mild steel fluxcore can run without gas, but does the same hold for stainless?

    I'm not referring to the need for back-purging, but for the need to have a gas envelope as if running solid wire.

  2. #2
    Join Date
    Dec 2006
    Location
    Alaska
    Posts
    732

    Default

    If it is a SOID wire then yes it will need some type of shielding.

    FCAW wire is tubular in form and has a core of flux. some are duel shield some are self shielding.
    TJ______________________________________

  3. #3
    Join Date
    Sep 2002
    Location
    Clark County, NV
    Posts
    2,696

    Default

    I've HEARD that ESAB makes a self-shielded SS wire. I'll bet it's expensive.

    All the cored SS wires that I've seen have needed a shielding gas.

  4. #4
    Join Date
    Jul 2007
    Location
    Batavia, NY
    Posts
    159

    Default

    Mac is right. Esab makes a product called Core-Bright which is a self shielding SS flux core wire. It is available in 308L, 309L and 316L. Available in 33# (12" diameter) spools in .045 and 1/16" diameters, and 5/64 and 3/32" 50 Lb. coils. As far as I know Esab is the only one that makes it.

    All other SS flux core wire you should use a shielding gas like 75% Argon/25% CO2.
    Rich Ferguson
    Sales Technician
    Jackson Welding Supply Co.
    "Keep America Strong.....Weld It"
    www.jacksonweldingsupply.com

  5. #5
    Join Date
    Apr 2007
    Location
    Ventura, California
    Posts
    102

    Default SS fluxcore better than solid wire?

    Gentlemen, I appreciate the responses.

    TJ - Thank you for confirming stainless fluxcore generally does require gas as well.

    MAC & Rich - I wasn't aware of the ESAB offering, I'll have to keep it in mind.

    If most SS fluxcore requires gas, is there an advantage over solid wire? Such as: It cleans better, has less spatter, makes a thicker bead (requires less passes), etc?

  6. #6
    Join Date
    Jul 2007
    Location
    near Fargo, ND
    Posts
    26

    Wink Advantages of flux-core

    I would offer one possible reason for using the fluxcore over solid wire and that is "convenience."

    The SS-flux core I have seen/used was recommended that it be used with CO2. I am not sure about using the C-25 blend as the situation has not presented itself. However, I digress.

    If you weld primarily mild steel you could potentially use CO2 for that and then use the same sheilding gas for the ss-flux core and eliminate the need for another gas type/cylinder lease/cylinder change for occassional use. (Since solid ss-wire needs tri-mix)

    Just my opinion...for what it is worth...
    ~ed~

    Have you ever noticed that enough is usually too much?!

  7. #7
    Join Date
    Nov 2006
    Location
    toronto,ontario
    Posts
    90

    Default re shielding gas required

    in my experience i would say depending on the quality of the bead the flux core gives you on its own and the quality of the piece your working on,it doesnt hurt to add the gas also, just improves your atmospere around your weld zone

  8. #8
    Join Date
    Jul 2007
    Location
    Batavia, NY
    Posts
    159

    Default

    Quote Originally Posted by All-about-design View Post
    I would offer one possible reason for using the fluxcore over solid wire and that is "convenience."

    The SS-flux core I have seen/used was recommended that it be used with CO2. I am not sure about using the C-25 blend as the situation has not presented itself. However, I digress.

    If you weld primarily mild steel you could potentially use CO2 for that and then use the same sheilding gas for the ss-flux core and eliminate the need for another gas type/cylinder lease/cylinder change for occassional use. (Since solid ss-wire needs tri-mix)

    Just my opinion...for what it is worth...
    Actually the main reason for using a flux core wire over solid is increased deposition rate, bead shape and ease of use (in flat position)

    Also you can use both 100% CO2 or 75 Argon/25 CO2. The reason I listed C25 is because 99.9% of people with MIG welder's have C25 for welding mild steel and you wouldn't have to aquire another cylinder.
    Rich Ferguson
    Sales Technician
    Jackson Welding Supply Co.
    "Keep America Strong.....Weld It"
    www.jacksonweldingsupply.com

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