7014 rod

[roadhunter]

Furu, I have the 200ST as well and it runs WAY hot as well. 1/8 rod I run between 60 and 80 amps depending on the steel. You have that 300, right?

That seem really strange. Hopefully Mark can shed some light on what is going on there.

 

[MinnesotaDaveChalmers]

Gary Fowler - you are the first I've seen bring up an issue with mild steel and hydrogen cracking. I researched it further to locate a reference.

Here is the only one I've found so far, but it is interesting. http://products.asminternational.org/fach/content/fach9001/fach90011/fach9001113.html
(I expected to not find any, but since I did find one I included it)
The rod used in this case was 7024, they specifically mentioned using 7018 as a solution.

Hydrogen-Induced Cracking of Welded Truss Gusset Plates
William F. Jones III, Consulting Metallurgical Services, Inc.

From: Handbook of Case Histories in Failure Analysis, Vol 1, K.A. Esakul, Ed., ASM International, 1992
Abstract: Six cracked A36 steel gusset plates

 

[Arc weld]

For probably 98%+ of the projects welded on here, hydrogen cracking won't be a concern and 7018 only needs to be in an oven when doing critical code welding. It has to be kept dry and away from moisture but you don't need to go out and buy a rod oven. It does burn nicer out of an oven though. As far as burning it colder and going slower to get better fusion, that's a contradictory statement. Burn it where it flows properly.

 

[MinnesotaDaveChalmers]

LH rods or any rod with a coating that contributes to the weld metal pool needs to be stored dry and preferably heated to above 250F.

I would respectfully disagree with part of this statement. All rods need not be stored in an oven. 6010, 6011 are specifically not to be stored in an oven.
Storage temp for several rods is well under 250F.
Clearly you are correct that LH rods should be stored in an oven - but I contend for normal home use it's not critical.

Here is a couple sample tables on the topic of temperature (for those that have not seen them).

 

[Reverser]

Well, this is interesting.

Everyone knows, or at least should know, that LH rod like 7018 need to be heated in an oven to be code compliant.
But, I had no idea that non-LH rod with a coating that adds to the weld metal, could cause hydrogen embrittlement. And the fact that they would need to be kept dry, preferably heated to above 250F for an hour, is very seldom complied with.

For some non-LH rod to cause hydrogen embrittlement to the point of failure, must be pretty rare.
I can understand it more with 7014 & 7024. But that 6013 might need conditioning, is really a shocker. I'll bet there's been many an old farmer that have repaired their implements with their old buzzboxes and damp 6013's.

 

[Rock knocker]

I would respectfully disagree with part of this statement. All rods need not be stored in an oven. 6010, 6011 are specifically not to be stored in an oven.
Storage temp for several rods is well under 250F.

That's not what Gary said, he said low hydrogen or any electrode where the coating is incorporated into the weld metal (like 7024, 8024 etc). Gary's post would exempt 6010 and 6011 from going in the oven

 

[Big Barn]

Re: old farmer using damp 6013 with buzz box. That would have been me.

 

[Reverser]

Re: old farmer using damp 6013 with buzz box. That would have been me.

Sorry, I didn't mean to call you old. :laughing:

 

[MinnesotaDaveChalmers]

That's not what Gary said, he said low hydrogen or any electrode where the coating is incorporated into the weld metal (like 7024, 8024 etc). Gary's post would exempt 6010 and 6011 from going in the oven

If I misunderstood, apologies to Gary.

 

[newbury]

Since the thread has gone "dry" -
I've bought some of the HF rod storage tubes.

Would it be worth adding a dessicant keep the rods dry? I'm down in Mississippi, my shop doesn't have a/c and it's 94 deg F w/ 50% hmidity.

/edit - and what the heck do they use for rods in that picture? A 5lb box of 1/8 FILLS the tube. Those must be 1/32 rods.