I'm a knife guy, too, and I suspect many of the properties that are important for a blade (ability to hold an edge, easy to sharpen, etc.) don't really apply to a bicycle.

In contrast, a bike's frame is its suspension (no, it's not the wheels) so absorbing shock and transmitting energy are important; I've never heard those qualities mentioned in connection with a knife.

Also, the steel must be conducive to welding and/or brazing or soldering without losing the desired qualities.

I am sure there are more examples, but I'm beginning to bore even myself.

I'm carrying a Boker Trapperliner w/ smooth red bone scales today; how about you?