That still doesn't mean anything useful. That's just a measure of how much it changes shape per unit force in its elastic phase. It gives no indication about

That still doesn't mean anything useful. That's just a measure of how much it changes shape per unit force in its elastic phase. It gives no indication about how far it can go changing shape in a reversible, elastic manner before it starts to yield and undergo permanent deformation. Now a stress-strain curve on the other hand, THAT would be useful.