Recently, tube steel manufacturers in the US have begun using the new ASTM A1085 specification for forming tube steel (a.k.a. hollow structural section or HSS) shapes, as opposed to the existing A500 specification.
tighter tolerances (no need to take reduced wall thickness for design)
identical yield strengths for all types of tube members (as opposed to A500, in which the yield strength differs for round and rectangular shapes and depending on the grade)
set maximum yield stress of 70 ksi (useful for seismic applications, though I am not well versed in this area)
standard Charpy V-notch requirements corresponding AASHTO Zone 2 (I assume useful for the transportation industry for fatigue reasons)
These benefits come with a small premium - I've read 7% to 10% increased cost depending on the mill.
I primarily work as a structural engineer in the nuclear industry. Most of the work I do is in services, where we perform mostly small modifications to plants (i.e., no design of large buildings for the most part, but smaller supports, platforms, and the like).
If I have no need to restrict the maximum yield strength of the material and I have no fatigue concerns, is there any benefit to specifying the newer A1085 tube steel material over the existing A500 specification? For practicing engineers in non- or light-seismic zones, have you realized any benefit using the new A1085 spec?