Blades and horseshoes??!!

[Jeff D]

Hi Michal,

I have read somewhere that repeatedly working the iron will make it harder that is why horseshoes and nails where often used in many cultures. I will try to find the references tonight when i have time.
I have no first hand knowledge about making knives/swords but I have observed that the second half of a horseshoe wears much slower than the first.

Hope this helps.
Jeff