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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 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%.
The katana belongs to the nihontō family of swords, and is distinguished by a blade length (nagasa) of more than 2 shaku, approximately 60 cm (24 in). [9] Katana can also be known as dai or daitō among Western sword enthusiasts, although daitō is a generic name for any Japanese long sword, literally meaning "big sword". [10]
In some techniques, notably the traditional folded steel blades of China, Korea, and Japan, the billet might be drawn, folded and welded back on itself creating layers of steel of different types. In others longer bars or rods of steel and iron might be welded together, edge to edge, to create the basic billet placing the softer iron inside ...
kōgai (笄) – a skewer for the owner's hair-do, carried in a pocket of the scabbards of katana and wakizashi on the side opposite of the kozuka. [33] [34] kogatana (小刀) – any knife, particularly a small utility knife carried in a pocket of the scabbards of katana and wakizashi. ko-itame-hada (小板目肌) – see itame-hada. [35]
The Henckels Miyabi line markets this steel with the name "MC66". R2 is a PM steel made by Kobe Steel Japan (Kobelco). It is also known as SG2 (Special Gold 2) when it is marked by Takefu Specialty Steel. SRS-15 is a High-Speed Tool Steel (HSS) where the 15 represents 1.5% C. One of the earliest known Japanese "super steels". The maker is unknown.
Generally it is the short blade that accompanies a katana in the traditional samurai daisho pairing of swords, but may be worn by classes other than the samurai as a single blade, also worn edge up as the katana. The name derives from the way the sword would be stuck at one's side through the sash. [21]
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.