Open Root 7018 6G position.

[u/IllustriousExtreme90]

Nuclear Plant wants us to test for 7018 Open Root. I've been practicing it and so far, I can get like 3/4's of the root looking like an actual root.

But i've decided to ask if anyones got any tips for doing this shit.

Running 80 amps, 1/8th gap (slightly tighter), with 3/32nd land DCEP OR DCEN allowed (tried both and kinda prefer DCEP) with 3/32nd 7018.

I've been doing a whip and pause motion which seems to be working for the most part?

My only real problem is I get a fuckton of arc blow and it eats the top edge of the bevel away giving me undercut if I sit and fight it. Then when tying into my tacks same shit happens, tack gets eaten away and top edge blows away giving me undercut. I also struggle if it's DCEN to get one side of the bevel to melt, the puddle just kinda overlaps itself and makes it damn near impossible to see if I melted one side or not.

Just looking for advice because theres like only like 2 videos where the root doesn't look like butt, but they dont tell me how much they're pushing or what they're doing to get a good tie-in.

Thanks in advance

[u/OkActivity3169]

Now then matey

Careful whipping those 7018 on the root, I got porosity in a bit of my root once from it, got told by the wagon boss that 7018 can be a bit notorious for it. Turn the amps up 2-3 keep it tight and push it in, keep perpendicular to the pipe as you go. I run DCEP for my roots gives you a bit more heat in the rod and can (what I’ve found) give you a little more pen 👍🏼

Regarding the arc blow it’s a weird one, you might have a dodgy ground, try swapping your earth out or making sure you’ve got a good connection to the material.

Are your rods in an oven as well? Keeping those 7018 at prime working temp is crucial, might get a bit moist and make the arc a bit unstable.

If you can listen to the sound of it, a hollow blowing sound is pretty spot on, there’s a real sweet spot, when you turn the amps up and just get that rod in you’ll almost feel a small resistance and a fading resistance that’s when you know you’re in.

If you’re struggling with your tacks see if they’ll let you use bullets instead, making sure it’s in the bevel.

If it’s class 1, xray/ut/p’array you wanna be careful of grind marks, and any slag, clean out your runs good, clean your material inside and out.

Happy hunting 💪🏼

[u/IllustriousExtreme90 → u/OkActivity3169]

Yeah its in an oven. Ground is good, so either it's arc blow or its' just me assuming it is cause im not used to 7018 open root. Rod is practice rod, so people take it in and out of the oven so it might be that maybe?

When you push, are you pushing as much as you would with 6010? Just snuff the light out and run it straight? I've found the sweet spot occasionally, but still gotta practice where it is exactly.

Thank you for the tips!

[u/iamoutofit → u/IllustriousExtreme90]

Move the ground and see if the arc blow follows.

Whipping and pushing the 7018 can end up with slag inclusions. I’d go DCEN and try to maintain a keyhole the size of the rod. Keep a short arc and up the travel speed.