which is the most tough and durable steel type ??
Speaking of Building Construction, we use grade 450 and 450B not because of toughness, its because it best serves its purpose, reinforcing concrete structure should provide the enough ductility of structure to resist flexure/bending when loads are imposed on it.
C'mon. Really? That's your question? How about some actual details like the application, is it going to be formed into a shape, do you need to weld it, what type of environment like corrosion and temperature is it going to be subject to? There are roughly 2,000 grades of steel and a couple hundred grades of stainless steel. Steels can be soft or they can be exceptionally hard. We need more info please.
