I'm getting more serious about a combat robot design I've been contemplating for several years now (BattleBots, Robot Wars, etc) and find myself overwhelmed by the sheer variegation of ASTM and AISI grades and alloys. I hope that by detailing the application, those familiar with the nomenclature can steer me in the right direction.
The overall design is a full-body spinner - somewhere around 0.75m in diameter, at least 2500 RPM. (Approximately 205 MPH weapon speed, though this is a minimum target.) The circumference is lined with five or six solid-mount blades approximating the size and shape of forestry mauls, though slightly thinner - while primarily relying upon inertia and brute force, I would like to retain some degree of sharpness/cutting.
Structural integrity is the key attribute, remaining intact (if deformed to some degree) in spite of high-speed impacts with fixed hazards, opponents, and/or similar spinning weaponry. Any significant separation would be of serious concern owing to the high-speed rotation.
The blades will be mounted to the outside of the body with high-strength bolts, anchoring roughly half the length and 60% the mass of each individual blade. (I have no intention of ever welding these pieces as even a fractured blade would be swiftly replaced.)
Withstanding impacts and remaining affixed with minimal distortion is highly desirable. Retaining a sharp edge would be nice, but this is mostly wishful thinking - for the sake of other traits, some sacrifice must be made.
What little I understand of this sort of metallurgy has me looking at ASTM-S1, which seems to be recommended for high-speed impacts and sudden shock-loading. (Also assuming those terms mean what I think they do.)
Any guidance/recommendations in this department would be greatly appreciated.