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S30V’s clearest advantage over D2 is corrosion resistance. It also rates higher for abrasive edge retention, while its toughness lead is small. D2 can still make sense in a knife you like at a better price, provided you are willing to keep the blade dry and protected.
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 S30V | D2 |
|---|---|---|
| Abrasive edge retention | ||
| Toughness | ||
| Corrosion resistance |
Heat treatment, hardness and geometry affect actual knives.
Stainless Care Is the Biggest Difference
S30V rates 7.5 for corrosion resistance and D2 rates 4.5. For sweaty pocket carry, damp outdoor work or frequent food cutting, we would give that difference more weight than a small change in sharpening intervals.
D2’s chromium content does not make it behave like a fully stainless knife steel. Wipe it after use, dry it before storage and use suitable corrosion protection when needed. S30V still benefits from cleaning, especially after salt or acidic food exposure.
S30V Has the Higher Wear Rating
The abrasive edge-retention ratings are 6 for S30V and 5 for D2. That favors S30V for repeated wear-heavy cutting, but it does not tell us that every S30V knife outcuts every D2 knife. Hardness, edge angle and blade thickness can change the experience substantially.
A well-ground D2 blade may be a more satisfying package opener than an unnecessarily thick S30V blade. If you are comparing two versions of the same model, the steel ratings become more useful because fewer design differences get in the way.
Our S30V steel profile gives more detail on its wear resistance and sharpening considerations.
Neither Steel Is a Shortcut to a Tough Knife
S30V rates 4 for toughness and D2 3.5. That half-point gap is small. We would not buy S30V expecting it to turn a thin slicing edge into a chopping or prying tool.
This comparison uses conventional D2, not CPM D2. Treat a CPM D2 listing as a different material choice rather than borrowing these toughness figures. For either steel, repeated chipping calls for a look at edge geometry, heat treatment and use.
The D2 steel profile explains its conventional-steel identity and maintenance needs.
Choosing Between the Actual Knives
We would choose S30V when its extra corrosion resistance removes a regular maintenance worry. It is also the stronger option here for someone doing lots of abrasive cutting with otherwise similar blades.
D2 remains reasonable for dry use when the knife itself offers better value or a preferred design. Do not assume the steel name determines the price: compare the actual models and decide whether the S30V option’s benefits justify any premium.
Composition
Our steel composition guide explains what the elements do and how to read these values.
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).
D2: Niagara typical composition, mass %; selected elements, not a batch analysis. Niagara Specialty Metals: D2.
| Element | CPM S30V | D2 |
|---|---|---|
| Carbon (C) | 1.45% | 1.42% |
| Chromium (Cr) | 14% | 11.5% |
| Molybdenum (Mo) | 2% | 0.9% |
| Vanadium (V) | 4% | 0.8% |
| Nitrogen (N) | 0.2% | Not listed |
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.
- Knife Steel Nerds: stainless steel composition table (July 2026)
- Niagara Specialty Metals: D2
