Flux Core Question
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Flux Core Question

  1. #1
    ptz
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    Question Flux Core Question

    i just picked up a little welder from harbor freight.
    how many amp and what wire feed should i set it to to weld up some 1018 cdbw .120 wall rec tangle tube ?

    i know there are some real RKI's on here that are into construction..
    than ks in advance.

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    Member Richcraft's Avatar
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    fold open the door the info your looking for shoud be on there

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    Senior Member HKROB's Avatar
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    Try using some Hobart .030 wire flux core wire.You will need 115-130 amps to weld .120 wall tubing.If you can use gas sheilded wire you will get a much cleaner weld vs flux core .

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    Senior Member ironman's Avatar
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    Quote Originally Posted by HKROB View Post
    Try using some Hobart .030 wire flux core wire.You will need 115-130 amps to weld .120 wall tubing.If you can use gas sheilded wire you will get a much cleaner weld vs flux core .
    ditto on that... if you run gas try .023 wire works alot better in the smaller machines

    Ironman

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    Some guy obnoxious001's Avatar
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    Quote Originally Posted by ptz View Post
    i just picked up a little welder from harbor freight.
    how many amp and what wire feed should i set it to to weld up some 1018 cdbw .120 wall rec tangle tube ?

    i know there are some real RKI's on here that are into construction..
    than ks in advance.
    I have a small Lincoln that I have done a lot of flux wire welding in the field with, mostly on square tubing. You will probably find that you need to turn the thing up to the highest heat setting, and slow the wire speed down. My Lincoln works well at "2" out of a scale of "10" just for example.

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    Senior Member TwinTurbo540's Avatar
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    Flux is JUNK!! Lots of spatter and it's just a mess, you can get a nice gas set up with gauges for under $200 for that welder and a nice solid core .030-.023 wire in a 2lb spool.

    Travis

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    If its .030 wire try 3 to 4 and 65. If I were using flux core thats what my miller would be set at.

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    Senior Member h2oracer's Avatar
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    Quote Originally Posted by TwinTurbo540 View Post
    Flux is JUNK!! Lots of spatter and it's just a mess, you can get a nice gas set up with gauges for under $200 for that welder and a nice solid core .030-.023 wire in a 2lb spool.

    Travis
    Travis is correct but if you weld over something that has been flux core welded with a mig or stick weld it will crack. If you weld with a mig or stick weld on something with a flux core weld it will crack. Flux core is good by itself as long as its repaired with with a flux core weld.

    Get a good mig setup like Travis suggests and you won't have any problems and the weld appearance will look better.

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    Senior Member lbhsbz's Avatar
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    Quote Originally Posted by h2oracer View Post
    Travis is correct but if you weld over something that has been flux core welded with a mig or stick weld it will crack. If you weld with a mig or stick weld on something with a flux core weld it will crack. Flux core is good by itself as long as its repaired with with a flux core weld.
    It might, but the flux core has nothing to do with it. It makes the same slag like stick welding. Flux core enables you to weld thicker materials with smaller machine than would be necessary with MIG. If the original weld was done properly it would not have to be welded over in the first place, so your point is moot.

    To the OP...I have one of those very same welders...its a 110V unit right? has a switch for fast and slow wire feed and another for hi/low output? Its a great machine for what it is....For what you're trying to weld, put both switches on HI, or if yours has a knob, turn that to high too. Mine doesn't have a knob, just 2 switches.

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    jetboataholic HawaiianJet's Avatar
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    Quote Originally Posted by h2oracer View Post
    Travis is correct but if you weld over something that has been flux core welded with a mig or stick weld it will crack. If you weld with a mig or stick weld on something with a flux core weld it will crack. Flux core is good by itself as long as its repaired with with a flux core weld.

    Get a good mig setup like Travis suggests and you won't have any problems and the weld appearance will look better.
    Do you chip the slag off before you put another bead over it???????? My personal preference is also MIG but it is almost impossible to get a good weld outside using MIG if there is even the slightest breeze, without turning the gas pressure all the way up on the tank, which uses the gas very quickly. So for all my welding needs at home and on the boat I use flux core wire. At the shop, inside, MIG is the preferable process. And if done correctly you can get just as good a weld with flux core as you can with solid core.

    For that little Chinese shit box, turn the SOB all the way up and you might get some penetration.

    Here's my buzz box of choice for the home. 220V is the only way to go.
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    HJ

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    Oh yeah, Forgot to mention that the hull is a special mixture of speedcote, herculiner and rain-x, all blended together- good for another 8 mph top end.

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    Senior Member h2oracer's Avatar
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    [quote=lbhsbz;513919]It might, but the flux core has nothing to do with it. It makes the same slag like stick welding. Flux core enables you to weld thicker materials with smaller machine than would be necessary with MIG. If the original weld was done properly it would not have to be welded over in the first place, so your point is moot.


    I have 40 years welding experiance doing repair on container cranes, trucks and heavy equipment and when you weld over an arc or mig weld with a fiux core welder it will eventualy crack. I have seen it happen and have been involved with Lincoln welding enginers regarding this problem. They don't recomend doing it. It has more to do with the materials being used even if the original weld was done properly.

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    ptz
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    Quote Originally Posted by h2oracer View Post
    I have 40 years welding experiance doing repair on container cranes, trucks and heavy equipment and when you weld over an arc or mig weld with a fiux core welder it will eventualy crack. I have seen it happen and have been involved with Lincoln welding enginers regarding this problem. They don't recomend doing it. It has more to do with the materials being used even if the original weld was done properly.
    Thank you For Clarifying The facts...
    There Was A Huge Flame out On Another Thread On Structural Welding anything With Flux Core..

    I Think Some Of The Experts Got It Mixed Up With Flux Coated Rod.
    ...I Didn't Realize There Were So Many Pipe fitter/ Welders On Here.
    Around Here They Like To Argue For The Sake Of Arguing.
    Maybe They Were Just Drunk..or smoke too much cush...


    got my 25/75 tank filled... now don't need to use the Chinese shuttle craft welder.

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