On 15 June, 09:09, The Natural Philosopher
wrote:
Andy Dingley wrote:
On 15 June, 00:48, The Natural Philosopher
wrote:

but cast iron isn't pure iron.

Its absurdly high carbon steel :-)

No you idiot, it's lumps of iron sitting next to lumps of carbon.
Neither is alloyed.

who mentioned alloyed?

Steel is an alloy between the carbon and the iron (i.e. whatever it's
crystals of, they're a combination of the two).

Cast iron is grains of iron, with the carbon free between them and
unalloyed.

In general, bulk cast iron has more carbon than a high carbon steel,
but the iron grains are still pure iron.