Sorry it's in the wrong area, I couldn't find where it should be. What can you tell me about brake rotor metal? Is it good for anything specific, or nothing at all? 

Thanks,

Dark Horse

I too would like to know. Specifically on luxury cars I’ve been told it’s high carbon- is that steel or cast iron?

It has been a while since i worked on cars but most brake rotors are made of cast iron. Some are carbon steel used for performance cars. The higher end sports cars would have the high carbon steel rotors. Luxury cars i would guess that it boils down to how much you paid for the car. A Cadillac, your getting cast iron. A Rolls Royce you are provably going to get high carbon. 

If nothing else you can always build a trebuchet and use them as ammo to lay siege to your neighbors kingdom. 

Anyway like i said it has been a while, about 10 years now, since i got out of the automotive world so things may have changed. 

I remember reading about a recall to replace rotors with stainless steel due to excessive corrosion (Jeep Cherokee, maybe?).  Probably wouldn’t make much difference to your neighbor, though. 

I've found the only good use for brake rotors is to make forge fire pots out of them.

I can’t control the wind. All I can do is adjust my sails. ~Semper Paratus~ USCG 1964-1970

They also make good bases for stringing chain to surround a demo area. I took some 1/2” square bar and forged a couple of loops for bolts in the rotor and did some twists for the vertical with a loop at the top. You can get creative if you want