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  1. #1
    Join Date
    Nov 2012
    Posts
    10

    Default need some advice

    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?

  2. #2

    Default need some advice

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

  3. #3
    Join Date
    Sep 2005
    Location
    northern NJ
    Posts
    1,821

    Default

    Your amps seem slightly high to me.
    MM250
    Trailblazer 250g
    22a feeder
    Lincoln ac/dc 225
    Victor O/A
    MM200 black face
    Whitney 30 ton hydraulic punch
    Lown 1/8x 36" power roller
    Arco roto-phase model M
    Vectrax 7x12 band saw
    Miller spectrum 875
    30a spoolgun w/wc-24
    Syncrowave 250
    RCCS-14

  4. #4
    Join Date
    Nov 2012
    Posts
    10

    Default

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

  5. #5
    Join Date
    Oct 2005
    Location
    North Central Indiana
    Posts
    781

    Default

    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.

  6. #6
    Join Date
    Nov 2011
    Location
    Edmonton
    Posts
    43

    Default

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

  7. #7
    Join Date
    Oct 2005
    Location
    British Columbia
    Posts
    242

    Default

    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.
    Last edited by OldSparks; 03-22-2013 at 07:50 AM.

  8. #8
    Join Date
    Sep 2012
    Location
    seaford de
    Posts
    406

    Default

    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.

  9. #9
    Join Date
    Nov 2012
    Posts
    10

    Default

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

  10. #10

    Default need some advice

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

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