On 14/12/2019 08:36, Richard wrote:
On 13/12/2019 15:39, FMurtz wrote:
Any steel boffins around?
Fe/CS
MnÂ* 2.03 0.86
FeÂ* 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?

Dunno, but watching Guy Martin doing the sword in Our Guy in Japan was
interesting.

+1

I didn't realise that they used fireclay to heat the cutting edge to
a different temperature than the rest of the blade.