S35VN vs M390 vs MagnaCut: EDC Knife Steel Comparison Guide 2026

S35VN vs M390 vs MagnaCut: EDC Knife Steel Comparison Guide 2026

If you've spent any time reading EDC knife reviews, you've seen these three steels quoted as if their differences are obvious. They aren't. S35VN, M390, and MagnaCut all sit in the premium powder metallurgy tier — they're all expensive, all hold an edge longer than budget steels, and all show up in $150-$400 folders. But the differences matter, and they matter differently depending on what you actually do with your knife.

This is the practical comparison: where each steel wins, where each loses, and which one to buy for your specific carry profile.

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What the Data Shows

A few signals from Drop Beacon's catalog of 19,000+ knives across 180+ brands:

MagnaCut is now the most-requested premium steel in 2026 releases. New folder launches over the last 12 months overwhelmingly cite MagnaCut as the headline material. Three years ago this was M390's slot.

S35VN remains the most common premium steel in mid-tier folders ($150-$300). It's the workhorse of the premium-tier EDC market — present in Chris Reeve, Hinderer, Spyderco Para Military 2 sprint runs, and most Western premium brands' standard production.

M390 is now positioned as a luxury steel. Bohler's M390 retains a slight pricing premium over equivalent S35VN or MagnaCut models, and increasingly appears in custom knives or limited sprint runs rather than standard production.

The price gap between these three steels at retail is smaller than you'd expect. A $250 MagnaCut folder has roughly the same materials cost as a $230 S35VN folder. The price differential is mostly brand positioning, not steel cost.

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S35VN: The Workhorse Premium

Crucible Industries' CPM-S35VN is the modern premium standard of EDC knife steel. Released in 2009 as an evolution of S30V, it's been in continuous production for 15+ years and has the largest installed base across the EDC market.

Composition: 14% chromium, 3% vanadium, 0.5% niobium, 1.4% carbon Typical hardness: HRC 59-61 Origin: USA (Crucible, in Syracuse NY)

Edge retention: Excellent for the premium tier. A well-heat-treated S35VN edge holds for 4-6 weeks of typical EDC use (cardboard, packaging, food prep, light wood) before needing a touch-up. About 3-4x the edge life of budget steels (8Cr13MoV, 14C28N).

Sharpenability: Moderate. The vanadium carbides in S35VN are harder than basic ceramic stones can effectively cut, so freehand sharpening on a $20 stone produces inferior results compared to the same effort on cheaper steels. Diamond stones, ceramic rods rated for premium steels, or guided systems (Wicked Edge, KME) get noticeably better results.

Corrosion resistance: Good. Will pit if exposed to salt water for hours but handles sweat, food residue, and humid environments without trouble.

Toughness: Good. Won't chip from typical EDC use (light prying, occasional bone contact during food prep) but isn't designed for hard-use scenarios like batoning or impact cutting.

Found in: Spyderco Para Military 2, Chris Reeve Sebenza/Inkosi, Hinderer XM-18, Benchmade 940, Pro-Tech Malibu, WE Knife mid-tier, lots of US-made customs.

Best for: The default choice. If you're not sure what steel you want, S35VN is rarely the wrong answer. It's the steel that just works for almost every EDC use case.

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M390: The Corrosion-Resistant Premium

Bohler-Uddeholm's M390 is the European premium-tier benchmark. Made in Austria using a similar powder metallurgy process to Crucible's CPM line, M390 has been the premium-tier export of European manufacturing into the EDC market since the early 2000s.

Composition: 20% chromium, 4% vanadium, 1% molybdenum, 1.9% carbon Typical hardness: HRC 60-62 Origin: Austria (Bohler-Uddeholm)

Edge retention: Slightly better than S35VN at peak hardness. The higher carbon and vanadium content produces more carbides, which holds an edge longer in abrasion-heavy use (cardboard, rope, fibrous materials). 5-7 weeks of typical EDC before touch-up.

Sharpenability: Slightly harder than S35VN. The higher vanadium content creates more wear-resistant carbides — meaning your sharpening process is slower and your stones wear faster. Diamond stones are essentially required for serious sharpening of M390.

Corrosion resistance: Excellent — the best of the three. The 20% chromium content makes M390 the most rust-resistant of the premium steels. This is the steel for buyers in coastal climates or who do food prep regularly.

Toughness: Slightly lower than S35VN. The higher hardness comes with slightly more brittleness. Avoid using M390 for impact tasks or twisting motions.

Found in: WE Knife premium, Bestech premium, Spyderco M390 sprint runs, Lionsteel, most European custom and semi-custom folders. Note: 20CV (Crucible's US version of M390) is functionally identical and shows up in a lot of US-made folders that need M390 properties without import licensing.

Best for: Buyers who prioritize corrosion resistance, who carry in coastal/humid environments, or who want a premium-feeling steel where the higher edge retention and finer-grain microstructure are perceptible.

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MagnaCut: The 2020+ Standard

CPM-MagnaCut, designed by metallurgist Larrin Thomas and released by Crucible in 2020, is the current cutting-edge of premium EDC steel. It was specifically engineered to balance edge retention, corrosion resistance, and toughness — three properties that traditionally trade off against each other.

Composition: 10.7% chromium, 4% vanadium, 1% molybdenum, 1.15% carbon (with smaller amounts of niobium, nitrogen) Typical hardness: HRC 62-64 Origin: USA (Crucible)

Edge retention: Comparable to M390. About 5-7 weeks of typical EDC before touch-up. Where MagnaCut differentiates is at higher hardness — it can be heat-treated to HRC 64 without losing toughness, which means it holds a finer edge longer than S35VN or M390 at the same hardness.

Sharpenability: Easier than M390, comparable to S35VN. The lower chromium content and the specific carbide morphology make MagnaCut more forgiving of basic sharpening setups. Diamond stones still recommended but ceramic rods produce respectable results.

Corrosion resistance: Excellent — better than S35VN despite the lower chromium. The way MagnaCut's microstructure is designed (with chromium carbides that stay smaller and more dispersed than in older formulations) gives it real corrosion resistance with the chromium it has. In comparative salt-water testing, MagnaCut performs comparably to M390.

Toughness: The best of the three. MagnaCut was specifically designed to handle hard-use applications without chipping — it's the only one of these steels you'd consider for a fixed blade meant for batoning, prying, or impact cutting.

Found in: Most premium folders launched 2022+. Spyderco MagnaCut sprints, Hogue Deka MagnaCut, Chris Reeve Sebenza in MagnaCut, Survive! Knives fixed blades, custom maker fixed blades, Bestech and WE Knife flagship variants.

Best for: Buyers who want the latest and best without major trade-offs. Particularly strong choice for fixed blades or hard-use folders where toughness matters. Increasingly, the default premium-steel choice for new folder launches.

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Side-by-Side Comparison

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Which Steel Should You Actually Buy?

Three decision shortcuts that handle most cases:

Buy S35VN if you're shopping in the $150-$300 tier and want the broadest selection. Most premium folders in this tier ship in S35VN. You'll have the most model options, the most price points, and the most resale liquidity (S35VN folders sell faster on the secondary market because more buyers know what it is).

Buy M390 if you carry in coastal/humid environments or do food prep regularly. The corrosion advantage is real and perceptible over 1-2 years of carry. Also a solid choice if you're cross-shopping European brands (WE, Bestech, Lionsteel) where M390 is the natural premium tier.

Buy MagnaCut if you want a fixed blade, a hard-use folder, or a folder you'll keep for 10+ years. The toughness advantage matters more for tasks that exceed pure cutting (light prying, impact, drawing through bone or fibrous material). Also the right answer if you're buying a 2022+ flagship folder where the brand specifically chose MagnaCut for marketing reasons.

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Steels NOT in This Comparison Worth Knowing

A few steels close to the same price tier:

S45VN is Crucible's update to S35VN, with slightly better corrosion resistance. Showing up in Spyderco premium models and Bohler S45VN sprint runs. Functionally a drop-in replacement for S35VN.

S30V is the predecessor to S35VN, still in production and slightly less expensive. Edge retention is comparable but corrosion is slightly worse. Most older Spyderco models still ship in S30V.

M4 is Crucible's tool steel — incredible edge retention but very poor corrosion (will rust quickly without active care). Used by Benchmade and Spyderco for sprint runs aimed at users who'll maintain their knives. Not for casual EDC.

Elmax is Bohler's mid-premium steel that sits below M390. Excellent corrosion, slightly less edge retention than M390. Found in some Spyderco models and Benchmade variants.

S90V is Crucible's high-vanadium edge-retention monster. Best edge retention of common EDC steels but very hard to sharpen. Use case: a knife you maintain rather than re-sharpen.

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Brands Featured in This Guide

Drop Beacon catalog pages for the brands most associated with these steels:

• Chris Reeve Knives
• Spyderco
• Benchmade
• WE Knife
• Hinderer Knives
• Pro-Tech Knives
• Hogue

Related comparison posts:

• Spyderco vs Benchmade: Which EDC Knife Brand Should You Buy?
• Spyderco Budget Knives Buyer's Guide
• WE Knife Buyer's Guide
• Best EDC Knives 2026

Frequently Asked Questions

Is MagnaCut really better than M390?

For most EDC purposes, marginally yes — but it depends on what you're optimizing for. MagnaCut wins on toughness (handles hard use better) and slightly on sharpenability. M390 wins on corrosion resistance in salt-water environments specifically. For a typical EDC folder used for cardboard, packaging, and light prep, the practical difference between the two is small enough that knife choice (designer, ergonomics, lock mechanism) matters more than steel choice.

Why is S35VN still common when MagnaCut exists?

Three reasons. First: industry inertia — most premium-tier production runs were already in S35VN before MagnaCut became available, and brands don't switch steels every product cycle. Second: S35VN is genuinely sufficient for the vast majority of EDC use, so buyers don't always pay a premium for MagnaCut. Third: S35VN is slightly cheaper to source, and the cost difference matters when brands are competing on price at the $200-$300 tier. S35VN is good enough plus, and that's a strong commercial position.

Can I sharpen these steels on a basic Lansky or DMT stone?

S35VN and MagnaCut sharpen acceptably on basic diamond stones (DMT) but lose performance on ceramic-only setups. M390 essentially requires diamond stones — ceramic alone won't cut the carbides effectively. If you're carrying any of these three steels and want to maintain factory sharpness, invest in a quality diamond sharpener ($30-$80) and a leather strop with compound. The investment pays off across all premium steel ownership.

Is the steel difference worth the price premium?

For a daily user, yes — over the course of years of carry, premium steels meaningfully reduce sharpening frequency. A $250 S35VN folder vs a $50 budget folder isn't $200 worth of feeling premium — it's about 4x the time between sharpenings (3-5 weeks vs 1 week of typical use), better corrosion resistance over years, and significantly better resale liquidity. For someone who carries occasionally or sharpens infrequently, the upgrade is harder to justify.

What knife steel will replace MagnaCut as the next standard?

Hard to predict. The trend in EDC steel design has been toward balanced formulations that don't trade off properties — MagnaCut is the current expression of this. Possible candidates for the next standard include further evolutions of MagnaCut (Larrin Thomas continues to publish steel research), Vanax (Bohler's nitrogen-based stainless), and some emerging Korean/Taiwanese-developed powder steels. The practical answer for most buyers: stick with MagnaCut for new purchases through 2027-2028 and reassess as new steels mature.