S35VN vs MagnaCut.

Less chromium on paper, more protection on the blade

Read the two composition lines side by side and MagnaCut looks like the weaker stainless. It lists about 10.7% chromium. S35VN lists roughly 14%. Yet the published sources rate MagnaCut excellent for corrosion resistance and S35VN good. The chromium figure is the wrong number to shop this pair on.

Only dissolved chromium resists rust. Whatever share of it bonds with carbon into chromium carbides is spent on the edge instead, and a carbide does nothing against moisture. So a composition line is a starting total, not a rust rating: two steels can list different chromium totals and finish with the reverse order of free chromium once their carbides have formed.

MagnaCut was designed by metallurgist Dr. Larrin Thomas around that exact problem: keep the chromium in solution rather than locked into carbides. The full story of how the alloy does it belongs to the CPM MagnaCut steel entry. For this comparison the practical point is simpler. S35VN's corrosion rating is good and described as similar to S30V's, a solid premium stainless result. MagnaCut's rating is a step above it on a smaller chromium budget, because more of that budget is doing the rust work.

The rust rating holds at a harder window

The phrase that matters in MagnaCut's corrosion note is "for its hardness". Its published window runs 60 to 64 HRC, with around 62.5 cited as the toughness balance point and up to 65 with a cryogenic step. S35VN's window is 58 to 61. A window that high normally has a cost on some other line of the sheet. The published note says MagnaCut was engineered to maximize corrosion resistance for its hardness, which is a claim that it does not pay that bill in rust.

So the comparison is not just excellent against good. It is excellent held in a harder window against good in a softer one. For a buyer, that means the alloy was designed so a maker can run it hard without giving the corrosion margin back. Where any given blade landed inside its window is the maker's decision, and Knives Now does not test the heat treat of individual knives.

Edge retention also rates higher for MagnaCut, excellent against very good, but that is not the argument this page makes. The wear resistance and sharpening side of the S35VN upgrade question is argued in CPM-20CV vs S35VN.

What the step up costs on these two shelves

The step from S35VN to MagnaCut costs less at the middle of the two shelves here than at the entry point. The S35VN shelf holds 31 listings across 17 models, starting at $114.99 with a median of $159.99. The MagnaCut shelf holds 17 listings across 10 models, starting at $134.99 with a median of $157.46.

Look at the middle of each shelf, not the ends. The median MagnaCut listing here sits slightly below the median S35VN listing. The step up shows at the entry point, where the cheapest MagnaCut knife costs more than the cheapest S35VN knife, and at the ceiling, where one Böker listing sits well above everything else on either shelf. Across most of the range you are choosing between knives at similar prices.

The brands differ more than the prices do. Kershaw holds 9 of the MagnaCut listings, Hogue 5, Buck 2 and Böker 1; 16 of the 17 carry a made in USA mark. Case holds 21 of the S35VN listings, Buck 7 and Böker Plus 3, with 26 of the 31 USA made. Buck is the one brand on both shelves, so a Buck buyer can choose the steel without changing makers. The whole MagnaCut shelf is gathered in every CPM MagnaCut knife we stock.

Who should keep the money

MagnaCut's corrosion gap over S35VN is worth paying for when water, salt and sweat are what finish your knives. That means a blade used on a boat or around bait, a fixed blade that goes back into its sheath damp, a folder carried in a humid pocket all summer, or a knife that cuts fruit and gets closed before anyone wipes it. MagnaCut is the steel to pay for when the wipe down does not always happen.

The gap is worth less when the knife lives dry and gets wiped as a habit. S35VN's good rating covers ordinary sweat and humidity, and the knife you choose, its pattern, lock and handle, will shape your days more than the step from good to excellent. Neither steel is rustproof. Salt water or acidic residue left overnight can mark either one, so rinse and dry after wet use whichever you buy.

For the full account of S35VN on its own, see the S35VN steel entry. If your concern is chips rather than rust, the toughness and wear trade at the value end is set out in Nitro-V vs S35VN, and the rest of the pairings are listed on the Steel Lab index.