That SS bar is mystery metal for the time being. However, one end (not shown) has the stampings from when it was forged/milled. Maybe those numbers/codes would point to the details of it.
I recall when I was machining it I had to go very light with the tools otherwise it would either break the tool or something would give and the part would ride up on top of the tool.
I recall when I was machining it I had to go very light with the tools otherwise it would either break the tool or something would give and the part would ride up on top of the tool.