The katana “Zhang Sanfeng” is made of German folded steel, hand-forged and differentially hardened. The technical specifications are as follows:

• Sugata (Blade style):
  • Hand-forged with a blade sharp on both edges. The blade spine is iori-mune, the edge is without Niku (cutting sharp blade). Folded Steel:
    • C45 = AISI / SAE / ASTM ( USA ) No. 1045
  • C55Si7 (USA: steel 1095)
  • C105 W2 - DIN 1.1645 = AISI / SAE / ASTM (USA)  No.W1.
  • The hardness of its Ha (blade edge) is ca 60° HRC Rockwell. 13 times folded to achieve ca. 8192 layers. Traditional clay-wrapping technique for differential hardening makes the Hamon visible. There are beautiful hada (grain in steel, pattern of folding the steel) in the blade.
  • Dimensions:
    • Nagasa (blade length): ca. 76 cm / 30 inch.
    • Sori (curvature): none
    • Moto-Kasane (thickness): ca. 0,6 cm.
    • Saki-Haba: 24 mm.
    • Moto-Haba: 34 mm.
    • Nakago (tongue) with Mei (inscription) according to the tradition: WKC - Year of production.

• Fuchi-Kashira (Cap):
  • Beautifully carved golden brass with a special design.

• Tsuka (Grip):
  • Wood grip, adapted to the tongue. Length 12 cm.

• Mekugi:
  • Made of bamboo wood and placed in the middle of the grip.
    

• Saya (Scabbard):
  • Selected wood that fits the blade. It has four brass ornaments. Two ornaments in the middle are linked by silk cord.

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• Total Weight:
  • Without Saya: ca. 37.03 oz.
  • With Saya: ca 58.80 oz

• Included Accessories:
  • Soft protective cloth bag