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Tool Talk Discussion Forum

Re: Welding 7018 with a buzz box

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Stan in Oly, WA

12-19-2012 11:30:56

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Didn't Lanse recently make a video comparing 7018 and 6011 welds done both AC and DC? If I remember correctly (never a given, nowadays), the 7018 welds on AC turned out to be slightly stronger than those done with DC.

7018 is not a purely DC rod like 6010. Lincoln lists DC+ as the preferred polarity for their E7018 H4R (Jetweld LH-70), but also lists the setting range for AC for all sizes up to 3/16" rods. Above 3/16", AC is listed as the preferred polarity.

I've never found a 7018AC that I like. I haven't been forced to use it much, but the few times I've tried it, it's shown a tendency toward erratic behavior, and occasional porosity. I'm not saying it's bad---just that it has never worked well for me. If I only had an AC welder to use, I might still use regular 7018 (run it a little hotter and try real hard), or take the time to shop around until I found a 7018AC that I liked. But I've already tried at least five brands---Lincoln, Weld-It (Hobart's second best), Forney, and two or three mystery rods which weren't any of those---and haven't been impressed with any of them.


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12-19-2012 14:23:49

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 Re: Welding 7018 with a buzz box in reply to Stan in Oly, WA, 12-19-2012 11:30:56  
We bought a Lincoln like the one pictured in 1962, except ours had a metal selector switch. Since I didn't know that you couldn't use a 'regular' 7018 rod with an AC welder.....'til I read it on 'here' a few years ago......I've been using 'em for almost 50 years.........nearly all being 5/32 rods. I always thought they worked great. Have had to replace the fan, but the welder has been essentially bullet-proof.

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