If the bandsaw doesn稚 do well, try a cutoff wheel on your angle grinder. I have always been successful using the angle grinder on thick steel (especially hardened steel).
That's no challenge for a cold-cut saw, if you have one.
I put the head in my 4X6 bandsaw, and the steel cut nicely,, slow, but nice,, that 4X6 saw ain't much,,,,
The 9X16 saw has a 5-8 variable tpi blade,, the head cut should be no problem.
I tinkered in the garden today,, maybe tomorrow I will try cutting the head,, again,,