What rod?

[Rio_Grande]

I used to have some high tensile rods but I used them all and cannot remember what they were. We used them on equiptment for the applications that would see more stress than the average stuff.

Any idea what they may have been?

 

[Tobias Dunlap]

Could have been a lot of different things. My best guess would be either 7018H4R or 8018. Ive used both for high tensile applications. Might have been a 9018, but they arent very common.

Is there any other info you could give us to help you remember? Color, Who made them things like that? What were you welding with them would be helpful too.

 

[Rio_Grande]

thanks for the reply, Sorry for the generalness of the question but i have been out of them for some time and just now need them again.

They were a dark almost black rod, I remember they were supposed to be a high tensile deeper penetration rod. They dont run very smooth but they are strong.

I need to weld a wedge onto a beam for a press and I wanted to use the deepest penetrating toughest rod I can for it. The wedge is going to be used to crush car rims so it needs all the help it can get.

Any rod you can recomend for this application would be appriciated as I doubt I will ever really know what it was that I had before.

 

[Tobias Dunlap]

7018H4R ESAB ATOM ARC is what I would reccomend. With a good bevel and preheat they are hard to beat for toughness and durability. Do you know what alloy the wedge is?

As for the black rod, nothing "High Strength" rings a bell. The only black rods I have on my truck are NI55 rods for machineable cast iron repair.

PM me if you want to and I'll do my best to help more.

 

[gwdixon]

PM me if you want to and I'll do my best to help more.

If you wouldn't mind - go ahead and post the discussion here instead of through PMs.

Inquiring minds want to know. Someone else may pick up information that they also could use.

 

[weldermike]

I used to use a dark grey rod that didnt weld smoothe when I used to weld on the railroad, it was a manganese rod for taking high impact, and they were from a company called Stultz.

 

[yomax4]

Keep in mind that the higher you go in tensile strength, You start to lose in ductillity. If there is minimal flexing, 11018 would even work. you would have to by 50# as no distributor has that laying around in small quantities.
Good luck

 

[rjmack]

most people don't stop to think that the weld is attached to the parent metal. no matter how strong the filler metal (rods) are, they are still attached to what is usually just mild steel.

i generally assess the needs of something like what you described in terms of psi... you can't change the 'p' (tensile strength) but you can change the 'si' (square inches).

the best rod for piling it on thick is probably plain old 7018. it will stay ductile even if you put multiple large passes on and, unlike the various low alloy rods that would fit the description of what you are looking for, it won't develop stress cracking issues when applied prodigiously.

it also makes sense to reinforce the areas of the beam that are being welded to, after all, the same 'psi' rule applies to what you are connecting to. 1/2 inch of weld on a 3/8 thick beam doesn't really do much without a beam stiffener or gusset of some sort... even then, the weld probably shouldn't be thicker than what you are welding to. if you find yourself stuck using this rule, then you are probably under-engineered for the job and might think about changing some pieces out for heavier material.

 

[deereman75]

What about just beveling it, and do a root pas with 6010, and then stack stringers with 7018.

 

[5030]

The first number sequence indicates the tensile in thousands of pounds of force. In other words, 60 series is 60,000 pounds tensile, 70 is 70,000 pounds tensile and so on.

As the tensile strength climbs (as said previously) ductility decreases and I agree, for ease of application ESAB Atom Arc Acclaim 70 series is the ideal rod.

It wets out nicely and it's forgiving.

Remember, it's always DC reverse polarity.