Think of steel as a composite. It is made up of several different elements. As I am sure you know, each element has its own characteristics.
And just because this is sounding easy I will point out that some of those characteristics change based on the other elements in the "composite" AND the amount of the elements in the mix (the "ratio" of each to the other).
The mix of elements that are used to create "AR500" are substantially different than the mix used for mild steel. So, short answer: No.
Ivan. I love this experimenting stuff. I'll hit Jones Steel ASAP and see if I can pick up a couple of pounds of 8018 and 9018s. Thanks!!