CPM REX 45 knife steel
CPM REX 45 is a powder-metallurgy (PM) tool & high-speed knife steel, typically hardened to HRC 62-66.
| Type | Tool & high-speed · powder metallurgy |
|---|---|
| Hardness | HRC 62-66 |
| Edge retention | extreme |
| Corrosion resistance | low |
| Toughness | medium |
| Ease of sharpening | hard |
| Price tier | Super / high-end |
| Best for | EDC / folders |
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Similar tool & high-speed steels
| Steel | Type | HRC | Edge | Corrosion | Toughness | Tier | Buy |
|---|---|---|---|---|---|---|---|
| Böhler K390 PM | Tool & high-speed | 62-65 | extreme | low | medium | Super / high-end | Knives → |
| CPM Maxamet PM | Tool & high-speed | 64-68 | extreme | low | low | Super / high-end | Knives → |
| CPM-10V PM | Tool & high-speed | 60-64 | extreme | low | medium | Super / high-end | Knives → |
All tool & high-speed steels · every steel · best for a purpose