Product Manual

Page 31 of 47
The OVERHEAD POSITION is the most difficult welding position. Angle A (see
HOLDING THE TORCH) should be maintained at 60 degrees. Maintaining this angle
will reduce the chances of molten metal falling into the nozzle. Angle B should be held
at zero degrees so that the wire is aiming directly into the weld joint. If you experience
excessive dripping of the weld puddle, select a lower heat setting. Also, the weave
bead tends to work better than the stringer.
d. Multiple Pass Welding
Butt Weld Joints When butt welding thicker materials, you will need to prepare the
edges of the material to be joined by grinding a bevel on the edge of one or both
pieces of the metal being joined. When this is done, a “V” is created between the two
pieces of metal that will have to be welded closed. In most cases more than one pass
or bead will need to be laid into the joint to close the “V”.
Laying more than one bead into the same weld joint is known as a multiple-pass
weld.
The illustrations in the following figure show the sequence for laying multiple pass
beads into a single “V” butt joint.
NOTE: WHEN USING SELF-SHIELDING FLUX-CORE WIRE it is very important to
thoroughly chip and brush the slag off each completed weld bead before making
another pass or the next pass will be of poor quality.
Fillet Weld Joints Most fillet weld joints, on metals of moderate to heavy thickness,
will require multiple pass welds to produce strong joint. The following figure will show
the sequence of laying multiple pass beads into a T fillet joint and a lap fillet joint.