MOVE THE TORCH GRADUALLY CONTINUE WITH
THIS PROCEDURE ALL THE WAY AROUND THE SHANK. THIS CREATE A
COMPLETE METALLURGICAL BOND.
That is a bit vague. If it had said “all the way around the
seam” it would have been more understandable. You’ll need to
weld the seam on top, sides, and inside the shank; hence, “all
the way around the shank”. (On a lightweight shank you’re likely
to achieve full penetration without welding from all sides.)
Remember to keep all materials very clean, don’t use flux or
boric acid and an oxidizing flame works best (propane, hydrogen
or city gas are good, not acetelyne as it introduces too much
carbon contamination into the material).