Iron in folklore

Iron has a long and varied tradition in the mythology and folklore of the world. While iron is now the name of a chemical element, the traditional meaning of the word "iron" is what is now called wrought iron. In East Asia, cast iron was also common after 500 BCE, and was called "cooked iron", with wrought iron being called "raw iron" (in Europe, cast iron remained very rare until it was used for cannonballs in the 14th century). At the end of the Bronze Age and beginning of the Iron Age, tools (including weapons) of iron replaced those of bronze, and iron-using cultures replaced bronze-using cultures. Many early legends spring from this transition, such as Homeric epic and the Vedas, as well as major cultural shifts in Africa. Iron mixed with larger amounts of carbon has very different working properties and structural properties, and is called steel. Steel was rare; making it was difficult and somewhat unpredictable, and steelworkers were often associated with supernatural skill, until the Industrial Revolution. Now, steel is cheaper to make, and most of what is now sold as "wrought iron" is in fact mild steel. See ferrous metallurgy for more historical detail. "Cold iron" is historically believed to repel, contain, or harm ghosts, fairies, witches, and other malevolent supernatural creatures. This belief continued into later superstitions in a number of forms: Nailing an iron horseshoe to a door was said to repel evil spirits or, later, to bring good luck. Surrounding a cemetery with an iron fence was thought to contain the souls of the dead. Burying an iron knife under the entrance to one's home was alleged to keep witches from entering. "Cold iron" is a substitute name used for various animals and incidences considered unlucky by Irish fishermen. A similar phenomenon has been found with Scottish fishermen. Horseshoes are considered a good luck charm in many cultures, including those of England, Denmark, Lithuania, and Estonia, and its shape, fabrication, placement and manner of sourcing are all important.