anons, i have used an aluminum L-shaped plate as means of attaching a contraption, that is going to endure repeated pressure
i got curious if it was the right decision and googled "whats more flexible steel or aluminium?"
there seem to be conflicting answers, or im just not familiar with some of the terms used in the articles
is there anyone who can answer it with certainty? I have access to random metal scraps, and can probably find a steel "L"-shaped plate, but dont to waste time if aluminium is better. Its a 4mm plate, if it matters. Im looking for the most rigid material, that rather snaps than flexes ( within reason )

tl;dr
whats is more rigid, less bound to flexing under pressure - aluminium or steel?