Stick Electrode Smackdown (with video)

[Shield Arc]

The tensile strength, and yield strength should be self explanatory. But here is a video on Charpy impact testing.

Charpy Impact Test on V-notch Specimen - YouTube

 

[undercut]

The tensile strength, and yield strength should be self explanatory. But here is a video on Charpy impact testing.

Charpy Impact Test on V-notch Specimen - YouTube

Thanks for the video. Makes a lot more sense watching the test in action. Seems to be a lot of variability in the Charpy test for the 7018 ....

Also, I wish they would put in units for test results. 70 degrees and 20 degrees - thought they were talking about range of motion or angle of the breakage until I realized they were talking about temperature.

 

[monckywrench]

BTW you can also break them apart on a hydraulic press. The positioning will be obvious and you can induce gradual failure.

 

[eastexan]

I wouldnt trust that rod to hold tinker toys together...............

Well, I guess it's not for Tinker Toys.
But for railroads and ship building, it must be ok. :laughing:

 

[bigdeano]

This is certainly interesting. I've been using 7014 for almost 40 years. I've never had a weld break or even crack. I built a tractor with mostly 7014, some 7024 over 30 years ago. Weighs 7k with ballast, has 1 yd bucket on homemade FEL. I've moved lots of hard packed dirt and rocks with it. It's taken a beating. Not a single weld has cracked. So I'm very happy with 7014. I design my parts so the metal isn't bending and the welds are of adaquate size. My Sears buzz box won't run 7018, tried it long ago. Guess I'll stick with 7014.

 

[jdrobison]

I two use 7014 a lot, in high school I built a wood splitter using 7014, used the hydraulics on the tractor to power it. never broke a weld but did break my original beam splitting elm. that thing would really twist sometimes with elm . my last year in school i rebuilt it with a heavier beam and welded it all together with a mig, ag dept had got them new and the teachers didnt like them and said anything welded with them would stay together. :laughing: still using that splitter 25 years later.:thumbsup:

 

[swick1]

A properly designed joint helps a lot! 7014 is still a good 10000psi stronger than mild steel. It really depends on the application. Probably not good if you are weight conscious. A good weld with inferior rod is better than a poor weld with the "correct" rod.

 

[undercut]

I noticed that Lincoln carries a few different variants of 6011 and 7018 rods. What are the most common ones to use for general purpose mild steel welding?

 

[Shield Arc]

I' am totally convinced with these inverter welders you have to find the brand of rod that works best with that machine. So far I have the best luck with Hobart's 335A 6011, ESAB's 10P 6010, and ESAB's Atom Arc 7018. With any of my old Lincoln engine drive welders, they could care less what brand rod you run with them! :confused2: