Hey Class! I almost forgot-
The Crucible Specialty Tool Steel metallurgists and management YEARS AGO named me the official "Caveman Testing Facility". Whenever they come up with something new, they send it to me for testing to see if it can be heat treated here, successfully. If it passes the "caveman test" they can go to market knowing virtually all machine shops can handle the steel well or have little excuse for not doing so.
Here's why I bring this up...
I'd thought I'd try and get "sooophisticated" on ya all and see if some research on alloying elements would be of any benefit to explaining this stuff to you here on this thread.
I quickly found so much empty or half complete information via Google that I came to my senses and we're gonna do it my way.
Next Installment: Tool Steel Alloys and what they do, caveman style 