![]() Chromium protects against rusting by forming a thin layer over the iron, essentially blocking out the moisture. ![]() When iron is exposed to moisture - even small amounts of moisture in the air - it triggers a chemical reaction known as "oxidation." If the process continues undisturbed, the iron will turn into a different iron oxide, or what's more commonly known as rust. The inclusion of chromium offers a few key benefits, one of which is resistance to rust. Regular steel, on the other hand, consists primarily of iron and carbon with trace amounts of other compounds. Stainless steel swords are made of a steel alloy consisting of roughly 12% chromium. Why not? What's the difference between these two metals and how does it affect the quality of a sword? However, you won't find any respected sword makers using stainless steel for katanas or jingums. Today, there are several different types of steel used to produce swords, including stainless steel and high-carbon steel. They were also better at holding an edge than iron and bronze swords. Steel swords offered a superior level of strength and durability. ![]() This changed, however, with the invention of steel. Some of the early Korean and Japanese swords made of bronze and iron were susceptible to damage - and a broken sword didn't offer much tactile advantage on the battlefield. Both bronze and iron, for instance, are relatively weak when compared to steel. One of the most influential elements in determining the quality of a sword is the metal used in its construction. ![]()
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