I will coat each steel plate edge with rice coal slurry and I will heat them at industrial autoclave and quench together

FOR HAMON

What would be the best steel I can find easily at market and what would be its phase before hamon heat treatment ?

What would be the phase under rice slurry and outside of rice slurry after quenched ?

How many minutes does it needed to be in heat ?

Does plate needed a sharp edge ?

Thank you,

Mustafa Umut Sarac
Istanbul