Depending what grade of stellite you use but No 6 can be machined with HSS tools with care.
It's not that hard but tough and used on valves , seats and cam followers
On the old Triumph twins you could see a brazed or S/S joint on the stellite to steel joint.
I used to rep-rofile many std. stellite cam followers to racing profile for my blown, nitro burning Triumphs in the 1970s.
This was done on an old Poole Special lathe amazing what can be done with minimum tooling.
Think cutting tool and certain hard facings might be too brittle for my type of shock loading if I'm wrong can stand to be corrected.
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