If those turn out to be wrought iron you hit the jackpot .I say if they as you never really know till you cut it and bend it open to see the grain structure. Good score !
Wrought iron can be a chore to work with. Remember to keep it at a yellow heat, almost forge welding heat. Lower grades of wrought iron have a tendency to crumble if worked in thin sections especially if the temperature is too low.
Doug