need some advice

[mrman]

I having a problem with my vertical up 3/8 open root pass using 3/32 7018. I keep it about 80-90 but I keep burning through, or I get little penetration on the back side. I know I'm post to run a stringing, but am I missing here?

[Waymack]

why are you running a root with a 70/18 shouldnt you be usin a 60/10 or puttin your root in with tig?

[MMW]

Your amps seem slightly high to me.

[mrman]

that what the instructor wants us to do. I said the same, referring to the book.

[tackit]

Open root I would think you should be using a fast freeze rod like 6010 or 5P. Have your instructor make a weld and watch how he does it.

I Z my way up, hesitating on the sides long enough to tie in and fill the crater then I jump across the middle, the middle takes care of itself.

[Scottis1]

1/8 land 1/8 gap 75 amps 6010 rod, use stepping action

[OldSparks]

Long time ago did the 7018 root thing. It was good practice for stainless stick root. They're very similar and lo-hi is cheaper. 3/32 land and gap and use a wedge to maintain opening. I believe 70-75 amps, maybe lower. When doing these uphill roots, instead of straight on, try pivoting rod angle towards alternating lands......about 30 degrees.

[weldonwelding]

I have taken 5 structural tests 2 were AWS. I have never used 6010 on the root...only on pipe. You just turn the heat up a lil bit and whip it in.

[mrman]

thanks ill give it all a try. the instructor there at community college sucks, getting info from him is like pulling teeth.

[stevenj]

Structural test 7018 in the open root. No backer??! What's the code?