Re: Tooling steel for Firing pins
If I were going to make a firing pin, I'd use RDS, by Carpenter Steel.
Oil hardened from 1525 deg F = 61/62 Rockwell C
Temper at 400 deg F = 56/57 Rockwell C
To machine it, turn it at 90/105 sfpm using high-speed lathe tools. Much more wear-resistant than 01 tool steels......
If you want/need more info, I'll do my best to provide it.
"For those who fought for it, freedom has a flavor the protected cannot taste."
"USMC 8652, 2531, RVN Jun '67, - May 69"