Technical Summary
- Category: High Alloy Tool Steel
- Manufacturer: Carpenter Technology
- Process: PM
- Ratings: Toughness 1, Edge 12, Corrosion 3.5
- HRC Range: 66-70
Source attribution: Knife Steel Nerds and SteelHardnessLab.
High Alloy Tool Steel / Carpenter Technology
Rex 121
Toughness 1/10, Edge Retention 12/10, Corrosion Resistance 3.5/10. Target hardness range: 66-70 HRC.
Chemical Composition
| C | 3.4% |
|---|---|
| Cr | 4.0% |
| V | 9.5% |
| Mo | 5.0% |
| W | 10.0% |
| Co | 9.0% |
SteelHardnessLab Testing Data
Testing recognition: u/679696 and u/Skylark427.
| Manufacturer | Samples | Avg HRC |
|---|---|---|
| Biryukov | 1 | 67.0 |
| Spyderco | 1 | 70.2 |