History
During the Iron Age, the best tools and weapons were made from steel, particularly alloys which were produced with a carbon content between approximately 0.30% and 1.2% by weight. Alloys with less carbon than this, such as wrought iron, cannot be heat treated to a significant degree and will consequently be of low hardness, while a higher carbon content creates an extremely hard but brittle material that cannot be annealed, tempered, or otherwise softened. Steel weapons and tools were nearly the same weight as those of bronze, but stronger. However, steel was difficult to produce with the methods available, and alloys that were easier to make, such as wrought iron, were more common in lower-priced goods. Many techniques have been used to create steel; Mediterranean ones differ dramatically from African ones, for example. Sometimes the final product is all steel, sometimes techniques like case hardening or forge welding were used to make cutting edges stronger.
Read more about this topic: Iron Age Europe
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