Does anyone have any experience with the rod above?
We've been using it recently since Lincoln has quit making their 7028 and I have to say results have been mixed. Most of the time, the rod works great. However, on occasion, everybody gets theses really weird, giant holes in the top of their fillet. These holes are big, like you could fit a 1/8 rod into it, not looking like standard porosity. It won't matter how fast/slow you travel, no matter what, seemingly at random they appear. I know for myself, I'm not holding any kind of an arc on this thing, just dragging it along the base metal. Also, if you try to try to fill in an existing crater, sometimes the weld over the crater will be severely deformed, it almost looks like twisted die cast metal.
Some more info I can share on heat/polarity settings... We've been running this rod on AC at about 250A. Since I had some nice, thick steel I was working with I jacked my amperage up to 300A just to see if it would help, but still I ended up with some of those holes, though not as bad. I know some guys are having more trouble with this rod than others, and I seem to be doing ok with it most of the time, just odd that on 1 outta 10 welds I get these strange holes.
Any advice or experience with this rod would help. Also, if you were using 7028 from Lincoln, what are you all using now that it's so rare? And if you happen to read this post jwright, any news on Lincoln's 7028? I got an email saying they were reformulating their 7028 to use some of the Excalibur formula but not to epect any soon...
quote:
Louis:
As I understand it, the E7028 electrodes will not meet the lower H4 hydrogen level. We are working on a new design with the Excalibur formulas but I am not promising any product in the short future.
Harry
Get the latest news from Lincoln Electric and a chance
to win - sign-up for our e-mail newsletter at
http://www.lincolnelectric.com/community/newsletters/If you have additional related questions and would like to reply directly to this message, please include a short description of your original inquiry, or reply with history, if possible