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  #21  
Old 01-13-2013, 01:24 PM
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There was a study done sometime ago as to weld defects and dual shield had the least amount of defects per weld inch.


I have like 10rolls of 0.45 Esab dual shield and use it for all larger fit up jobs.

It does take a little more time since with multi pass I have to clean the weld but if you are worried solid welds dual shield would be the way to go..

If you have a high enough amp machine and you are festidious about clean surface prep then I'd use 0.045 or even 0.060 and burn it in hot.. Easy clean up and as long as you have the parts warm enough any stress cracking should be avoided.
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  #22  
Old 01-14-2013, 08:24 AM
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I don't know if it was mentioned before but I assume that you know and will need to use the larger sized rolls and tips if you are going to use the bigger wire.

Ed.
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  #23  
Old 01-14-2013, 09:57 AM
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You may find this MIG handbook useful...

lots of why's, wherefors, facts and specs in black and white .....easy to get to..

might eliminate some guesswork and supposin...........

http://www.esabna.com/EUWeb/MIG_handbook/592mig1_1.htm
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  #24  
Old 01-18-2013, 06:02 AM
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It was a several years after buying my 350P before I finally upped the ante and bought a big roll of .o45 wire. I soon after bought a roll of dual shield as well. This machine will probably never see .o35 again.

The 350 just rocks with .045 and larger.

I use the 180 for the smaller wire these days and things are just peachy.
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  #25  
Old 02-08-2013, 08:57 PM
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Quote:
but I need to figure out the best way to weld new ones on. We have two 250 amp wirefeeds--a Lincoln and a Miller--but I have to confess that we've never had anything heavier than .035 wire in either one.
So Keith, what did you guys decide on what to use. Bigger wire or stick?

Personally, using wire seems to, most times, end up with better looking welds and less cleanup and hardly any finish grinding etc for those of us that are just anal about things.

Since I last posted about my using the .o45 wire with the 350P, I've had the needs to so about 10 hrs of solid seat time welding with it. It sure brings me back to the older younger days when that's all we used except when we used larger for specific needs.

Just curious what you came up with and used.
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  #26  
Old 02-10-2013, 03:51 PM
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Since you not talking about a big job you would be just fine using .035 ER70-S6 wire, .035 is a good General purpose wire, If your going to do this work all the time or if you dont mind spending the money then jump up to the .045.

I run 90/10 for my gas on most general stuff.

The Dual shield flux core is also a good choice but make sure you find out the recommended gas for the Dual shield, Most dual shields dont like 90% argon, they like more co2 and some like all co2.

No one gave bad advise, However what you have currently will work.

You need to be more concerned about pre heating your base material and wire brushing between each pass to remove the residue before making another pass.

Good luck if you havent already done this.
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  #27  
Old 02-10-2013, 08:45 PM
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Keith...

this online calulator may be useful to you...

Solid wire

http://www.millerwelds.com/resources...calculator.php


Fluxcore

http://www.millerwelds.com/resources...calculator.php



I have a MM350P and happily use any aids that make my work better and easier...
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Last edited by H80N; 02-10-2013 at 09:17 PM.
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