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S30V has a clear abrasive edge-retention advantage over CTS BD1N, while CTS BD1N has the higher corrosion-resistance rating. Their toughness scores are close. If you are deciding between two everyday knives, the practical question is whether wear resistance or more corrosion margin matters more to you.
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 | CTS BD1N |
|---|---|---|
| Abrasive edge retention | ||
| Toughness | ||
| Corrosion resistance |
Heat treatment, hardness and geometry affect actual knives.
CTS BD1N Is Not CTS BD1
The nitrogen-bearing CTS BD1N grade is the material compared here. Do not apply these scores to a knife marked CTS BD1 without the N; the similar names do not make the steels interchangeable.
Carpenter’s CTS BD1N data sheet identifies its nitrogen range. The exact grade on the maker’s specification is a better guide than a shortened retailer title.
Our S30V steel profile takes a closer look at its properties and care.
S30V Has the Stronger Abrasive-Wear Rating
S30V rates 6 for abrasive edge retention and CTS BD1N 3.5. For frequent abrasive slicing, we would favor S30V if the knife designs are similarly suitable.
Toughness is 4 for S30V and 3.5 for CTS BD1N. That half-point gap is small; we would not make it the deciding factor without considering the actual blade geometry and treatment.
Our CTS BD1N steel profile takes a closer look at its properties and care.
CTS BD1N Has More Corrosion Margin
CTS BD1N rates 8.5 for corrosion resistance against S30V at 7.5. Both are stainless, but CTS BD1N has the higher rating for someone who values resistance to damp carry.
Clean and dry either knife after exposure. The chart does not certify a knife for saltwater use or account for every other metal part in its construction.
What Would We Buy?
For cutting lots of abrasive packaging, our preference would be S30V. For lighter daily cutting where corrosion resistance carries more weight, a CTS BD1N knife that fits your hand and budget can be the more sensible purchase.
If you already like the CTS BD1N model, look for an actual wear-related limitation before replacing it. A higher steel score will not improve a handle or blade shape you prefer on the other knife.
Composition
Our steel composition guide explains the elements and the differences between reported values, ranges and limits.
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).
CTS BD1N: Carpenter Type Analysis ranges and maxima, mass %. Iron is the balance; values describe this source rather than every producer’s material. Carpenter Technology: CTS BD1N alloy data sheet.
| Element | CPM S30V | CTS BD1N |
|---|---|---|
| Carbon (C) | 1.45% | 0.85–0.95% |
| Chromium (Cr) | 14% | 15–17% |
| Molybdenum (Mo) | 2% | ≤0.5% |
| Vanadium (V) | 4% | Not listed |
| Nitrogen (N) | 0.2% | 0.1–0.15% |
| Manganese (Mn) | Not listed | ≤1% |
| Silicon (Si) | Not listed | ≤1% |
| Phosphorus (P) | Not listed | ≤0.03% |
| Sulfur (S) | Not listed | ≤0.01% |
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)
- Carpenter Technology: CTS BD1N alloy data sheet
