I was looking at the elongation of various steel alloys, and the numbers were in the 10-20% range. Is this the amount of elongation at the point of failure? If so, what is the percentage of elongation that we would observe before reaching plasticity? Did I use the term plasticity correctly? I mean the point at which the material will no longer return to its original state.
I would assume there are probably two numbers here. The elongation just before yield stress, and then the recommended maximum elongation that would actually be safe to use in practice.