if these are for your fire doors, consider fire-rated lift-off hinges. Available BZP or Stainless (PVD brass are sometimes available at vast cost)
The modern ones have lubricated bronze bushes and swing very freely. They now have a short, thick pin with a point on the end to ease location in the socket.
I prefer the look of the full-leaf British design
but continental design are widely available and may be cheaper. The metal is very thick and rigid.
Available under several brand names but I suspect all made in the same factory.
Royde & Tucker, Eclipse, Union, Enduro….