I made a pallet lift table out of 1/4" SS304 and now have about 5x the deflection that beam calculations predict. I noticed that the machine was shipped supporting a 500lb pallet. I thinking a few things: 1. Either shock loading from the 500lb pallet when the truck was going over bumps exceeding yield. 2. Creep from the pallet being supported for about a week now. Computer stress was about 6000psi, so pretty far from yield.
The table had two edges bent up on a press brake. One end of the table needs to be open to roll pallet lifts onto the table. I'm thing of going from 1/4" SS304 with edges bent on a press brake to welded 3/8" T1 A514. The yield of T1 is about 90kpsi, about 2x more than SS304.
Does anyone know the creep / cold flow SS304 vs A514/T1? Is there calculations to compute? I'm also open to comments/suggestions.