 Very interesting
Wow all interesting and informative stuff!
Understand, tough steels require the carbide tooling (indexed or otherwise). How do you know what type of steel you are dealing with? For example, assume you wish to modify a radius rod on a car or an axel, how can you tell the type of steel u are dealing with (putting aside any common sense or expected knowledge), is there some form of telltale I should be looking for?
Cheers | 
