I have a tungsten wedding band, and it does not have a scratch on it. I've had it for a couple years. It is tough but the reason you don't see knife makers use it ever is because it is very brittle. The jeweler said if I drop my ring on a hard surface it could shatter. Worth the risk to me and it was a lot cheaper than platinum.
Shatter, huh? so you cant saw thru it but you could break it with a small chisel....i guess that is why its not a good knife steel.... i should always remember that if i though of something, its prob not original and has been ruled out or figured out already...