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Damascus steel, also called Damascus steel, one of the famous steels of the pre-industrial era, usually made into weapon blades. The manufacture involved a secret carburizing process in which a wrought-iron form was heated to red heat in contact with various carbonaceous materials in closed containers. The result was an iron-carbon alloy containing up to 1.8% carbon. It is likely that the carbonized product was then annealed to dissipate some of the carbon before being hammered into bars for later being molded into articles such as swords.
Damascus steel is characterized by exceptional hardness and a watery, striped appearance caused by the varying carbon levels of the parent material. Sometimes a single bar is welded from several types of steel. The bar is bent, welded, refolded and welded again until the various layers of steel intertwine, and then it is worked to form the blade. The resulting patterns after tempering and finishing are distinct and complex. Damascus blades are judged largely by their watering, which serves as a guide to the quality of the steel.
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