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.
Fast Shipping! Most of our stocked parts ship within 24 hours (M-Th). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a company you can trust and have generous return policies. Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ About Us ]
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.