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The word tama means 'precious', and the word hagane means 'steel'. [1] Tamahagane is used to make Japanese swords, daggers, knives, and other kinds of tools. The carbon content of the majority of analyzed Japanese swords historically lies between a mass of 0.5–0.7%; however, the range extends up to 1.5%. [2] [3]
The steel used in sword production is known as tamahagane (玉鋼:たまはがね), or "jewel steel" (tama – ball or jewel, hagane – steel). Tamahagane is produced from iron sand, a source of iron ore, and mainly used to make samurai swords, such as the katana, and some tools.
The origin of the name "Damascus Steel" is contentious. Islamic scholars al-Kindi (full name Abu Ya'qub ibn Ishaq al-Kindi, circa 800 CE – 873 CE) and al-Biruni (full name Abu al-Rayhan Muhammad ibn Ahmad al-Biruni, circa 973 CE – 1048 CE) both wrote about swords and steel made for swords, based on their surface appearance, geographical location of production or forging, or the name of the ...
15N20, L6, and 8670 are steels containing 1-2% nickel, known for great toughness at around Rockwell C 58–60. L6 is popular for swords; 8670 would also be excellent and is easier to find and cheaper. 15N20 (.75% C, 2.0% Ni) is widely used with 1095 to make pattern-welded ("Damascus") steel.
Swords of the Viking Age. Woodbridge: Boydell Press. ISBN 0-85115-914-1. Verhoeven, John D. (2002). "Genuine Damascus Steel: a type of banded microstructure in hypereutectoid steels" (PDF). Materials Technology. Steel Research, 73 (8). Iowa State University: 356– 365. Archived from the original (PDF) on 3 September 2006 – via Internet Archive.
Tamahagane (玉鋼) is a general term for steel, not used prior to the Meiji Era, literally meaning "precious steel". Steel is smelted at Shimane facility for Japanese swords (nihontō (日本刀), commonly known as katana (刀)) by contemporary Japanese forge masters like Kihara Akira and Gassan Sadatoshi is still smelted in a tatara.