We independently evaluate all recommended products and services. Any products or services put forward appear in no particular order. If you click on links we provide, we may receive compensation.
S30V offers more abrasive edge retention than 154CM, with small advantages in the other two ratings. For someone deciding whether to pay more for S30V, the strongest case is repeated slicing, not the idea that 154CM is no longer useful.
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 | 154CM | CPM S30V |
|---|---|---|
| Abrasive edge retention | ||
| Toughness | ||
| Corrosion resistance |
Heat treatment, hardness and geometry affect actual knives.
What the S30V Upgrade Buys You
S30V rates 6 for abrasive edge retention and 154CM 4.5. Of the three properties shown here, this is the largest separation. It matters most when abrasive dulling, rather than rust or chipping, is what sends you back to the sharpener.
For a work knife that cuts packaging regularly, we would consider S30V an upgrade worth weighing. For occasional household cuts, a better handle, easier carry or a lower purchase price may be more useful than the added wear resistance.
Our 154CM steel profile is useful if you are weighing an existing knife against an upgrade.
The Smaller Gaps Need Perspective
S30V scores 4 for toughness versus 154CM at 3.5, and 7.5 for corrosion resistance versus 7. Those half-point differences should not be presented as dramatic changes in chip resistance or maintenance.
Both need a cutting edge matched to the task and basic cleaning after wet use. A poorly suited S30V knife is not rescued by being slightly ahead in these ratings.
The S30V steel profile covers the material behind that upgrade.
Plan for Sharpening S30V
S30V contains hard vanadium carbides that contribute to wear resistance. Diamond or cubic boron nitride abrasives are useful when sharpening this kind of steel, particularly when substantial metal removal is needed.
154CM remains a reasonable option if you enjoy maintaining the knife you already have. We would not replace a satisfactory blade solely to chase a higher score, and the table cannot tell you how long either knife will take to sharpen.
Is S30V Worth Paying More For?
If the knives are otherwise similar and you regularly wear an edge down through slicing, S30V is the direction we would favor. If you use the knife lightly, keeping 154CM and investing in a sharpening setup may solve more of the problem.
This is a comparison with conventional 154CM. CPM 154 is a different grade, and results for it should not be used to justify a claim about a 154CM knife.
Composition
Our steel composition guide explains what the elements do and how to read these values.
154CM: Selected nominal/typical values, mass %; not a batch certificate or complete analysis. Niagara Specialty Metals: 154CM.
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 | 154CM | 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, not a test of these finished knives.
- 154CM composition reference
- S30V composition reference
