Heat Treatment Specifications
Austenitizing
Temperature1030°C(1886°F)
Soak Time20 minutes
Tempering
Temperature150°C(302°F)
Time120 minutes
Cycles2x
Quench Medium
oil
Target Hardness
65 - 67 HRC
Performance Characteristics
Toughness4.5/10
Edge Retention9/10
Corrosion Resistance5/10
Ease of Sharpening3.5/10
Overall Score22/40
Interesting Facts
- 1Developed by Daido Steel, Japan
- 23% carbon, 20% chromium - extreme composition
- 3Can reach 67 HRC without becoming brittle
- 4Produced via gas atomizing and Hot Isostatic Pressing (HIP)
- 5Hattori KD Series introduced to world market in 1997
- 6Expensive and difficult to work - these knives are rare
Famous Uses
Hattori KD Series kitchen knives
Best For
High-end kitchen cutlery
Professional chef knives
Edge retention priority
Similar Steels
Not Recommended For
- Any field sharpening
- Impact loads
- Budget
Expert Tips
- 1Very expensive steel
- 2Hard to sharpen
- 3Powder metallurgy technology
- 4Hattori sole kitchen knife maker