Oh I love me some Sandvik. They make some lovely steel.
Which one?
I really am not sure what is meant by "hard use" or "beater" at this point, but if I'm going to bash the bejeebus outta some innocent object with a knife, I like that knife to be 5160. For a simple knife that I'm comfortable using a lot, that works well, and isn't "precious" (like an old pair of jeans) gimme AUS-8.