440C has a pretty high tempered hardness up to RC65?
Is 440C a brand or a mixture.

When I read Solingen or Sheffield I think of these as a place.
Are these also standards for steel?

Hitachi makes nice steels.
ATS34, Blue wrappers, white wrappers

What other brands of steel are good for razors?

For scary sharp is harder better? Up to what point?

-Bob