Cutting of Swords and Armour
In this video is presented a mathematical proof, using confirmed facts from archaeo-metallurgical research and experimental archaeology, that no sword can cut through other swords or plate armour.
Sharpness and hardness of the edge is the least important thing, if iron, copper or bronze should be cut, it is the amount of impact energy which helps the blade to go through cutting medium, by pushing aside the material.
Even if arms & armour are made of soft iron, without carbon and with 2% slag inclusions, the required amount of impact energy is still far beyond human capabilities. That’s why "super steel" capable of "cutting other swords and plate armours" is nothing more than a romantic myth.