Joe wrote:

Stronger, harder, stronger.. Steel with sufficient carbon compositions
can be heat-treated, allowing
parts to be fabricated in an easily-formable soft state then made
harder for structural applications.
High Carbon steel rolls and holds it's shape nicely, and I suppose high
carbon slows rust too!
I've never seen a carbon anything rust.

Joe

It is unfortunatley very dificult to heat treat large pieces, such as
boat hulls. As for forming, untreated high carbon steels and low carbon
steels, as 1005 behave simalarly at the onset, but with repeated forming
the high carbon will likely work harden and become brittle.

Rust? Just leave a file out in the rain for a day or two, it'll rust
like hell and I assure you that files are made from very high carbon
steels.

Cheers
Marty