CPM-20CV vs S35VN.

More carbide, longer between sharpenings

Edge holding in a stainless blade comes down to carbide: hard particles that keep cutting after the softer steel around them has worn back. CPM-20CV is built to carry a lot of it. Carbon is what forms carbides, and CPM-20CV runs about 1.9% carbon against about 1.4% in S35VN, with roughly 4% vanadium against roughly 3% (S35VN adds about 0.5% niobium). The published sources describe CPM-20CV as having high carbide volume and rate its edge retention excellent. S35VN rates very good, with a finer, more uniform carbide structure from its niobium.

The difference shows most in abrasive cutting. Cardboard, dirty rope, carpet, feed sacks and anything with grit in it wear an edge down by scraping away steel. The more carbide standing in the way, the longer the edge keeps working. On soft material like food or paper, both steels go a long time and the gap is harder to feel.

Neither alloy gets its history here. Read the CPM-20CV steel entry for the two-mill story behind that steel and the S35VN steel entry for the niobium swap, then come back to the choice.

The bill arrives at the sharpener

Sharpening CPM-20CV means grinding through the same carbide load that kept it cutting, and that is the whole price of the upgrade in one sentence. You buy fewer sharpening sessions, and each one that starts from a truly dull edge takes longer than it would on S35VN.

How much that costs you depends on your habit, not on the steel.

• If you strop or touch up early, before the edge has really gone, CPM-20CV rewards you. Maintenance stays short and the long intervals are pure gain.
• If you use a knife until it stops cutting and then sharpen, every session on CPM-20CV is the slow kind. S35VN, with less carbide to cut, is the steel that forgives that routine.
• If someone else sharpens your knives, the carbide load mostly shows up as time on their bench rather than yours.

The published sources behind this page do not prescribe sharpening angles or abrasives for either steel, so none are given here. The knife maker's guidance is the place to look for those.

Toughness and rust are not the deciding axis

Toughness is the property a buyer might expect to decide this pair, and the published sources do not rank CPM-20CV against S35VN on it. CPM-20CV is rated good for its hardness and wear resistance class, though not as tough as MagnaCut. S35VN is rated improved over S30V. Neither note measures one steel against the other, so the two go unranked on chipping. What both notes support is the usual rule: a thin edge twisted in a cut or used to pry is at risk in either steel.

Corrosion resistance does separate them, excellent for CPM-20CV on very high chromium against good for S35VN. It is a real difference and a secondary one here. Readers for whom rust is the main worry will find that engineering argued in S35VN vs MagnaCut. And the question of whether CPM-20CV and Bohler M390 are one steel gets its own page in CPM-20CV vs M390.

Pricing the upgrade shelf by shelf

The step up from S35VN to CPM-20CV shows at both the floor and the middle of this site's two shelves. CPM-20CV runs 10 listings across 7 models, from $141.75 to $287.94, with a median of $184.95. S35VN runs 31 listings across 17 models; the shelf opens at $114.99 and its median listing is $159.99.

Case is the easiest way to see the choice. It holds 5 of the 10 CPM-20CV listings and 21 of the 31 S35VN listings, so a Case buyer can pick the steel without changing brands. Gerber holds 4 of the CPM-20CV listings and Kershaw 1; the Kershaw Link Linerlock at $141.75 is the lowest priced way into CPM-20CV here. Every one of the 10 CPM-20CV listings is made in the USA, as are 26 of the 31 S35VN listings.

Put it together and the buyer profile is clear. If your knife spends its days on abrasive work and you keep an edge up as you go, CPM-20CV's extra carbide pays you back in time between sharpenings. If your cutting is mixed and your sharpening is occasional, S35VN delivers very good edge retention with a lighter bill at the stone and a lower price on this shelf. Every other pairing on the site starts from the Steel Lab hub page; the opposite trade, a tougher steel that dulls sooner, is Nitro-V vs S35VN.