"T.Alan Kraus" wrote in message
...
I have the choice of 4140, 1018, 12L14, 1045 cold rolled, W1 Drill rod, O1
Drillrod, A2 Drillrod for a 1.125 diameter round piece that is going to be
subjected to approx 400 lb of load in compression and subject to axial
loads of approx 200 lb for brief times. Without heat treating what would
you choose, and if heat treating to R 30-35 what would you choose?
Obviously if heat treating the selection would be minus 1018 and 12L14, am
I right? By the way the rod is only going to be max 2 ft long and
supported for about 6" at one end.

Fixed one end, and cantilevered? or simple support other end? Also, not sure
what distinction you draw between compression and axial load. In any case,
the loads are light. A 1" round bar will need a yield stress higher than 8
ksi for the worst case cantilever. Almost anything stronger than popsicle
sticks will support that, unless you're worried about deflection. How far
can it move?