Are T-slot tables necessary and is it worth paying more for steel?

Why are there no steel version of T slot extrusions? And steel t slot European type stainless steel T-nuts are divided into 304045 series Aozhan workshop mainly produces 201304316 stainless steel T nuts, complete steel t slot extrusion I am looking for steel T tracks which can be welded in place to make a fabricated table with T slots All I have found so far are aluminum T

steel t slot I want to add T-slot rails to it so I can slide things back-forth and keep them reasonably lined up is there such a thing as a pre-made Steel T