Hi guys!

Since we're using a lot of steel in our industry, I was wondering which type is the best? There are many steel alloys around which can be tempered with a million different techniques.
Of course I am aware that you need different types of steel for different purposes. But still, what's the best kind of steel for, let's say, construction framework? And does it need any tempering/hardening? I just learned about borocoat which is a sub-technique of boronizing. Do you think that kind of hardening is superior to older techniques such as induction hardening?