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Electrode selection for 16 guage tubing

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bill

03-24-2001 20:45:31




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In the process of welding some 16 guage 1x2 , will be using a ac/dc arc welder. What electrode and heat setting should I be using on this mild steel ? I was thinking about a 6013, but would like to hear of some suggestions.

Thanks,

Bill




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T_Bone

03-26-2001 19:37:14




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 Re: electrode selection for 16 guage tubing in reply to bill, 03-24-2001 20:45:31  
Hi Bill, I like 6011 or 6010 using DCSP(DCEN or straight polarity) and using the backstep method. In the backstep ( we'll assume your right handed for this example) you start the arc, start a small weld puddle, then move the arc back to your right about 1/4" to 3/8" then back into your weld puddle, then repeating the process. What happens is the weld puddle has a chance to burn maxmium penetration then cool slightly in the backstep, then deposit full cover metal in the weld puddle on the return without slag inclusions. If done smoothly the bead will look like a continous unbroken weld bead or look that you draged the bead in. This is also very usful method for welding glavanized. It will take some additional practice to master the backstep but is quickly learned. With the backstep method I have welded 22ga with 3/32" 6011 DCSP or about 1/2 the thickness of 16ga.

I find that 6013, 7014, 7024, 7018 has too much flux flow for light gauge metal and thus alot of base metal hole burning for most welders.

T_Bone

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Fred OH

03-28-2001 10:51:24




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 Re: Re: electrode selection for 16 guage tubing in reply to T_Bone, 03-26-2001 19:37:14  
T_Bone, glad to see your back, hadn't seen you for a while, getting worried about you. Tried insulting you and the whole bit. (grin) The method you describe as backstepping - we always described as "whipping" to keep the bead cool. Backstepping is where you move ahead a couple of inches and weld back to the previous bead. Used to control stresses and warping. Get on the stick out there and send us some of that good weather your having so we won't have to preheat so much. (another grin) L8R----Fred OH

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T_Bone

03-28-2001 20:19:05




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 Re: Re: Re: electrode selection for 16 guage tubing in reply to Fred OH, 03-28-2001 10:51:24  
Hi Fred, Backstep to AWS (American Welding Society) is a weld procedure as I decsribed. The backstep you decsribed is called "skip welding" and is also a AWS term as you described. A schematic symbol for a typical skip weld would be 2/6 meaning to weld 2" long every 6" on center and a symbol of 6/6 would be to weld 6" then move ahead 6" and weld back to the existing weld. Stress and warpage is best controlled buy the proper joint gap, gap equal to 1/2 of electrode diameter, and the proper tack weld spacing, tack weld of maxmium spacing of 3" but as close 1/2" on thin SM(sheet metal).

Sorry I've never heard the term "whipping" in welding. :)

The ytmag server on my end is extreamlly slow and has been for a month now. I missed the "ribbing" but will look forward to it in the near future.

T_Bone

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Fred OH

03-29-2001 20:18:30




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 Re: Re: Re: Re: electrode selection for 16 guage tubing in reply to T_Bone, 03-28-2001 20:19:05  
Hi T_Bone, I'm very surprised that you don't know the term called "whipping" as referenced to welding. Theres a lot of us out here that use this term and I'll see if I can describe it to you.
Whipping is an oscillating motion lengthwise with the direction of the bead. a similar motion may be used to obtain two opposite results, keeping the puddle hot or keeping it cool. Same as your reference calls "backstep". L8R----Fred OH

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BFO

03-28-2001 12:20:17




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 Re: Re: Re: electrode selection for 16 guage tubing in reply to Fred OH, 03-28-2001 10:51:24  
Thank's Fred, that's what I was thinking too, but with that foot-in-mouth thing I got going on latley I thought I'd let it go :^)



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BFO

03-25-2001 06:37:21




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 Re: electrode selection for 16 guage tubing in reply to bill, 03-24-2001 20:45:31  
On this thin stuff, fit is important. Take a couple of scrap pieces and try some 3/32 7014 and 7018 (my choice), try pushing the electrode, and pulling, to see which works best for you. It'll take a lot of practice, but it can be done.



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Fred OH

03-26-2001 07:50:18




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 Re: Re: electrode selection for 16 guage tubing in reply to BFO, 03-25-2001 06:37:21  
Amen on the fit! There is a general rule about welding and that is that you don't use a rod that is larger in diameter than the parent metal is thick. If you don't abide by this rule then the weld becomes unruly and hard to manage. Experienced welders remember this when they tread into this zone and take precautions against it. A real good fit, a short arc and a piece of copper to back up the weld are a few things that can help. The manufacturers also make 5/64" and 1/16" rods. I would advise a 5/64" fast fill rod as Bill described and weld downhill at approximately 15 degrees and I would set the welder a little HOT and run hot and fast DC. Less chance of a burn through with this method. Your mileage will vary. L8R----Fred OH

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BFO

03-26-2001 08:36:50




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 Re: Re: Re: electrode selection for 16 guage tubing in reply to Fred OH, 03-26-2001 07:50:18  
Hit the nail on the head as usual Fred! Hot, close, fast, and downhand, with 7018, and you'll fool your friends into thinking ya got one of them fancy mig machines ;-)



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Fred OH

03-26-2001 10:29:00




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 Re: Re: Re: Re: electrode selection for 16 guage tubing in reply to BFO, 03-26-2001 08:36:50  
Yep, Or you could take three wraps of balin' wire around it and get out your trusty blue wrench. (Well, somebody has to stick up for his methods, he won't get in here and do it himself) (grin) L8R----Fred OH



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Uh oh.....

03-26-2001 12:09:15




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 Re: Re: Re: Re: Re: electrode selection for 16 guage tubing in reply to Fred OH, 03-26-2001 10:29:00  
Where's my 10 ft. pole (8-)



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clickent

03-24-2001 22:05:22




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 Re: electrode selection for 16 guage tubing in reply to bill, 03-24-2001 20:45:31  
6013 is a easy rod to use but 7014 is a better all position rod. It also cleans up well and is easy to use. I would use 3/32 at about 60 amps. Keep your puddle moving or you will be blowing alot of holes in your tubing. Determining amps on thin metal has got alot to do with your skill level but I would suggest you start with 60 and adjust as suits you.



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