I think the curl bar is steel, it's a little worn but still usable and I'm sure it'd clean up nicely.
Plates (Gold's Gym) are in good condition, as are the spinlock collars (the cog-like things that keep the plates on the bar).
I got this set from a local freecycle a handful of years ago so I've no idea how old it actually is!
Curl Bar and Four 10kg Plates (CT1)
This offer has been gifted to someone and is no longer available.