Heat Treatment Specifications
Austenitizing
Temperature1175°C(2147°F)
Soak Time5 minutes
Tempering
Temperature560°C(1040°F)
Time120 minutes
Cycles3x
Quench Medium
gas
Target Hardness
68 - 70 HRC
Performance Characteristics
Toughness4.5/10
Edge Retention10/10
Corrosion Resistance3/10
Ease of Sharpening2/10
Overall Score19.5/40
Interesting Facts
- 1Crucible high-speed steel with 9% vanadium
- 2Part of the REX family (Rex 45, Rex 76, Rex 121)
- 3More wear resistant than Rex 45, less than Rex 121
- 465-68 HRC achievable hardness
- 5Extreme edge retention for specialty applications
Famous Uses
Premium cutting tools
Ultra-high-wear applications
Best For
Premium kitchen knives
Professional culinary
Extended edge life
Similar Steels
Not Recommended For
- Wet environments
- Field use
- Budget
Expert Tips
- 1Avoid Rex 76(HS) variant
- 2Professional HT recommended
- 3Sub-zero treatment beneficial
- 4PM technology