AFAIK, the closest we have anymore is mild steel, which still has a
significant carbon content. I believe that wrought iron is almost pure
iron. I suppose you could purge the carbon from mild steel by reheating it
in an oxygen environment (make a miniature Bessemer furnace?), but I'm no
metalurgist.

--
Bob (Chief Pilot, White Knuckle Airways)


"Frank" wrote in message
...
I had a steel (mild steel) security gate installed about 7 years ago and
now its turning into rust while the wrought iron gate on the same building
installed over 40 years ago has no rust whatsoever. From my understanding
its easy to work with and easy to weld. Wrought iron is great stuff but we
don't make it anymore in the US since 1900. Why is that? Could we still get
wrought iron and is it expensive like stainless steel?