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CPM 154 and S30V trade toughness for abrasive edge retention. CPM 154 has the higher toughness score, while S30V has more wear resistance and only a small corrosion-rating lead. Both are stainless steels, so this is mainly about what you ask of the edge.
Performance Ratings
For the science, we turn to Dr. Larrin Thomas of Knife Steel Nerds, who has kindly allowed us to share his ratings here.
| Property | CPM 154 | CPM S30V |
|---|---|---|
| Abrasive edge retention | ||
| Toughness | ||
| Corrosion resistance |
Heat treatment, hardness and geometry affect actual knives.
The CPM Prefix Matters
This comparison uses powder-metallurgy CPM 154, not conventional 154CM. Their similar names should not obscure the separate toughness ratings.
Confirm the full grade on the knife maker’s specification. A listing that alternates between 154CM and CPM 154 needs clarification before you rely on the comparison.
Our CPM 154 steel profile explains its properties and care in more detail.
S30V Has More Abrasive Wear Resistance
S30V rates 6 for abrasive edge retention against CPM 154 at 4.5. We would favor S30V when repeated abrasive slicing is the main workload.
That advantage does not set a fixed number of cuts or sharpening sessions. Edge geometry and treatment remain part of the result.
Our S30V steel profile explains its properties and care in more detail.
CPM 154 Has the Toughness Advantage
CPM 154 rates 5 for toughness against S30V at 4. Corrosion resistance is 7 versus 7.5, a small difference between two stainless materials.
We would give the toughness difference more attention than the half-point corrosion gap when choosing a knife for resistance to edge damage. Both still need cleaning and drying.
Choose the Edge Behavior You Need
We would lean toward S30V for abrasive slicing and CPM 154 when toughness matters more. Neither choice should override a clearly more suitable blade shape or handle.
For occasional everyday tasks, the actual knives may be more different than their material scores suggest. Try to solve a use problem rather than treating one powder steel as universally superior.
Composition
Our steel composition guide explains the elements and the differences between reported values, ranges and limits.
CPM 154: Selected nominal/typical values, mass %; not a batch certificate or complete analysis. Niagara Specialty Metals: CPM 154.
CPM S30V: Reported composition from Larrin Thomas’s July 2026 table, mass %; not a producer specification or batch analysis. This source lists 0.2% nitrogen for S30V; Niagara’s datasheet does not list nitrogen. Knife Steel Nerds: stainless steel composition table (July 2026).
| Element | CPM 154 | CPM S30V |
|---|---|---|
| Carbon (C) | 1.05% | 1.45% |
| Chromium (Cr) | 14% | 14% |
| Molybdenum (Mo) | 4% | 2% |
| Vanadium (V) | Not listed | 4% |
| Nitrogen (N) | Not listed | 0.2% |
Compare Two Knife Steels
Sources and Update Notes
- Dr. Larrin Thomas: knife steel ratings · Property ratings; the scores describe steels rather than individual finished knives.
- Niagara Specialty Metals: CPM 154
- Knife Steel Nerds: stainless steel composition table (July 2026)
