Cooper B-Line has strut components available in steel, aluminum, 304SS, and 316SS. The steel product has a size with a 3-1/4" channel, but a pair of the 1-5/8" stainless steel channels might be fitted back to back. The 316SS struts would be in 12 ga or 14 ga. Maybe single l-5/8" strut is adequate for your purpose, if appplication is similar to Bosch sizes.
Some available finishes for steel are galvanized, copper, paint, or PVC coated.
We are working on a Hydraulic Unit for the Gulf of Mexico,
The unit itself is all Stainless. For the substructure, we originally planned to use Stainless Channel, but found it cheaper to use a break press to bend all the shapes from plate (i think we used 1/2" plate)
But this being Canada, we might not get the steel as cheap as the states.
Are you looking for ease of fabrication in the first place, or ease of positioning/re-positioning equipment later?
By going with stainless, you've lost the former. 80/20 is made out of aluminum (with steel inserts and hardware) so it's easy to cut, drill etc. But even in aluminum it's FAR from inexpensive, even considering fabrication labour. I'd hate to imagine what 80/20 would be like in stainless- you'd need to sell body parts to pay for it!
If the latter is what you need, stainless UniStrut is probably the best you're going to get- the options are limited.
