I to will anneal stuff so it can be machined. I've found sockets to be around Rockwell hardness of 55-59. Looks like you got it down to around 30-35 hardness.
I started with a Craftsman tap and die set, that I now never use, as the hex dies are all high carbon steel. The taps in the set are also soft.
But they will do in a pinch. I just hate it when I use them on hard steel, and the teeth chip.