Heat Treatment Specifications
Austenitizing
Temperature1050°C(1922°F)
Soak Time15 minutes
Tempering
Temperature175°C(347°F)
Time120 minutes
Cycles2x
Quench Medium
air
Target Hardness
63 - 64 HRC
Performance Characteristics
Toughness7.5/10
Edge Retention7.5/10
Corrosion Resistance7.5/10
Ease of Sharpening6.5/10
Overall Score29/40
Interesting Facts
- 1Nachi-Fujikoshi powder metallurgy steel
- 2Created because Spyderco couldn't get SRS-15 (exclusive)
- 3Slightly modified version of SRS-15 for broader availability
- 4Can reach HRC 64 - very sharp and easier to sharpen than SG2
- 5Less prone to chipping than SG2/R2
Famous Uses
Spyderco Seki sprint runs
Tsunehisa kitchen knives
Seisuke knives
Best For
Kitchen knives
Precision cutting tools
Similar Steels
Not Recommended For
- Budget projects
- Beginners
- Rough work
Expert Tips
- 1Lower carbon than SRS-15
- 2Better corrosion resistance
- 3PM technology
- 4Substitute for SRS-15