Penetration & fusion - Part 5

  1. MichaelV

    MichaelV Forum Supporter

    Messages:
    221
    Location:
    Co. Antrim
    This time, 7018...

    Position & material:
    PB (2F), tee joint between 10 mm thick mild steel, rolled flat bars with rolled edges. Cut from same bar as used in all other Parts.

    Parameters:
    3 or 4 passes each side with 3.2 mm, 7018 (Elga P48M), DC positive, 125A, zero arc force. Passes were made on alternating basis. The rods were not baked or prepared in any way, and have been stored in a rod tube, following opening of the original vacpac months ago.

    Remarks:
    Satisfactory, if not very deep penetration. The root runs would perhaps be better with 2.5mm rods, but none are to hand. Again, the complete absence of ‘dig’ might be a factor. That’s the variable to be tested in Part 6 :thumbup:

    Michael


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  2. Bullet2012

    Bullet2012 Forum Supporter

    Messages:
    1,805
    Location:
    Berks
    :fish:
     
  3. Brad93

    Brad93 M J B Engineering

    Messages:
    10,397
    Location:
    Essex
    Them elga’s are pretty smooth with quite a soft buttery arc if I remember correctly. Very nice for subsequent passes or capping.

    Bohler FOX EV50 is another one with a softer arc.

    I’d probably put 10-15% arc force on with them in the downhand position.

    always liked the ESAB 48.00 or 55.00 as my go to 7018/7018-1.
     
    MichaelV likes this.
  4. MichaelV

    MichaelV Forum Supporter

    Messages:
    221
    Location:
    Co. Antrim
    You’re right about the Elga’s Brad. I’ve a fresh pack of 48.00 lined up for another test, but with some arc force introduced. The TP180 has a default arc force setting of 30%, which I’ll start with.

     
    Brad93 likes this.
  5. Feet 'n Inches

    Feet 'n Inches Out of the rat-race at last

    Messages:
    364
    Location:
    Devon, GB
    Considerable difference in the horizontal penetration between the 7018s and 6013s. My last firm before I had to drop out of the trade through back problems used 7018s almost exclusively with the exception of more specialised applications; I always found them a joy to use. Technology has certainly advanced in the 30+ years since I dropped out. The majority of the plants in the workshop were oil-cooled Oxfords or Pickhills with a couple of big MIG machines with basic controls by today's standards; site work was carried out with generators running DC. Looks like I'll have a lot of learning to do if I ever get an inverter.
     
    MichaelV likes this.
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