FMurtz wrote:
Any steel boffins around?
Fe/CS
Mn 2.03 0.86
Fe 95.4 2.19
Presumably heat cherry red and quench ,then in the old days used to
bring to selected colour then quench to temper but nowadays they seem to
stick in oven for selected time, how about 300 degrees for an hour then
let cool slowly?


There isnt a €˜one size fits all formula, it depends on the composition
and required hardness.

Your approach probably will result in initial hardening and some degree of
tempering but exactly where you will end up on the Rockwell scale is
debatable. If done a bit of reading around the topic to made things in the
past and some advocate multiple tempering cycles. There is quite a bit on
YouTube but mainly related to making knives rather than tools.