Why Did I use 6011 and a buzz box to build a Dolly?
A few weeks ago, I was under the gun to move all my equipment out of the shop I have been working in for about 3 years.
My machinist friend had a old Dake cold saw that was not on casters and was concerned about how he was going to move it around his shop once we loaded it on a trailer.
So he asked me to make a temporary dolly for the cold saw.
mind you, we only had a day or two before we had to be completely
vacated out of this building and I had a bunch of work to do so I didnt
have much time to spare in building this dolly.
And pretty much , the only material left in the shop was a stack of of 1-1/2" square tubing and some 1-1/4" angle. Both too lightweight to hold a 1000 lb cold saw.
So we thought if we doubled them up, and added a cross brace, that would do the trick.
thing I had to work around was the fact that we had already moved all
the mig welders and welding tables out the shop. So the only welding
machine left was a Lincoln tombstone buzz box. (AC welder).
But that is not a big problem, a Lincoln buzz box is perfectly fine for a quick fabrication job like this. Mig would have been quicker and better looking, but Stick was the only option today.
And Here is why...
E6011 rods are all position welding rods AND...can weld downhill very well.
Framing jobs like this dolly often have outside corner joints and being able to weld those downhill really speeds things up because the same amperage works for downhill and what you use for flat and horizontal welds.
.....AND 6011 rods will easily penetrated thru rust, mill scale, dross, paint, or pretty much anything.
Several years ago, I built a metal rack for the same friend out of some Square tubing and heavy wall angle. All the metal was free but had light rust on it. The angle iron was 4 inch leg with 1/2" leg thichness and the square tubing was 4 inch but only about 3/16" wall thickness.
But it was same situation, no mig welders in the shop yet, only the same lincoln buzz box.
We had an old box of 5/32" 6011 rods and a buzz box and a cutting torch. And we built a set of christmas tree style metal racks that are still holding at least a ton of metal to this day.
Actually, thinking back, it was probably the best way we could have done it. Those 5/32" 6011 rods set good and hot at around 160 amps will really dig whether you weld downhill or flat or horizontal.
6010 rods are used a lot for pipe welding and especially for welding a root pass in a pipe joint.
asme codes usually require uphill welding but there are other codes like API codes that require downhill using 6010.
... and are designed to weld either on DC or AC...with a stabilizer in the flux to allow for some smooth welding on AC (alternating current)
...6010 rod are DC only.
The welding technique for a root pass in pipe uphill is typically called a whip and pause technique for uphill. That means you move the electrode in and out of the puddle to control heat buildup and the size of the keyhole ( keyhole is a term used to describe the area melted away as you weld a root pass...its shaped like an antique keyhole).
For downhill root passes in pipe, the technique is a bit different. The machine is set at an amperage where you can just jam the rod in and it wont stick. If thing are set right, you hardly even see an arc on the outside of the pipe.
Other passes are also welded downhill using API code and are often X rayed to verify quality. So if pipeline welds are made downhill and are even subjected to Xray.. for that reason we know that good welds can be made downhill using E6010 or E6011.
(I made a point to address this because there is always someone willing to argue that downhill welding is no good.)
And for fabrication, the welding technique can be whip and pause, or small circles, a slight weave, even a drag motion works ok if you want a slightly convex bead.
There is really no wrong way to run a E6011 rod in my opinion. You just have to realize 6011 rods are a deep penetrating rod so you kinda have to watch for undercut...especially at the top of a horizontal bead.
For general fabrication, a mig welder makes things go faster and look better. But when all you have is a buzz box, you can still get the job done.
For some solid info on welding with 6011 rods visit Lincoln Electric