Quote Originally Posted by overkill View Post
The US guys harden to RC 50 to 54 and that gives it even more toughness.
To add to that bit, on my old bar spinner Moros I had a 3" x 3/8" x 28" S7 bar spun by a short mag through a 2:1 right angle box. Besides a bit of mushrooming at the tip, I never had a problem with the bar failing.

A few videos: