
Indirect Reduction: A process through which steel is obtained from iron ore, used in northern France at least as early as 1451. The hotter fire of a stuckhofen would reduce the iron to a liquid, which could be collected on a bed of charcoal where a portion of the carbon would be oxidized and run off; the resulting material is steel. Also known as the Walloon method. See Chronique: The Journal of Chivalry #13.
Insurance: (See Armour, as insurance)
Iron, as a material for armour: Surviving in a limited form after the fall of the Roman empire, until the 12th century the use of iron was restricted to weapons, mail hauberks, and casques or spangen helmets. During the 13th century sources for iron became more plentiful, and during the 14th century it became commonly available for use by armourers.
Recent tests by the Swiss Institute for Arms and Armour have shown that during the 15th century the use of steel, iron strengthened by the addition of carbon, was mastered by both Italian and German craftsmen. After the middle of the century most armour was made from steel rather than iron, making it more durable, resistant to rust, and more easily heat-treatable.
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