Is Magnacut Steel Good for Knives?

Magnacut: The Steel That Changed Everything

Magnacut, developed by Larrin Thomas of CTS-Boomerang, is the most talked-about knife steel to emerge in the last decade. It represents a fundamental departure from traditional steel-making approaches, and the knives featuring it have generated unprecedented excitement — and waitlists — in the knife community.

What makes Magnacut so special? In a word: balance. It claims to achieve what no previous steel has — simultaneously offering exceptional edge retention, outstanding toughness, and excellent corrosion resistance. If the claims hold up, it represents a genuine leap forward in blade steel technology.

What Makes Magnacut Different

Magnacut was engineered from the ground up using computational metallurgy — a process where advanced computer modeling is used to predict and optimize the properties of steel alloys before they're ever produced in a physical lab.

The key to Magnacut's performance is its microstructure. It uses a combination of:

• Carbides formed from vanadium, niobium, and chromium — distributed in a specific pattern to maximize wear resistance without sacrificing toughness
• A martensitic matrix with optimized alloy content for corrosion resistance
• A proprietary powder metallurgy process that ensures uniform carbide distribution with no large carbide clusters (which create weak points in traditional steels)

Larrin Thomas spent years developing the alloy, testing hundreds of compositions before arriving at the final Magnacut formulation. The result is a steel that challenges the traditional trade-offs between hardness, toughness, and corrosion resistance.

Magnacut Composition

• Carbon: ~1.5-1.6%
• Chromium: ~15%
• Vanadium: ~4%
• Niobium: ~2%
• Molybdenum: ~3%
• Tungsten: ~1%

The combination of vanadium, niobium, and tungsten carbides creates an incredibly hard, wear-resistant steel. The high chromium content (15%) provides corrosion resistance comparable to the best stainless steels. And the powder metallurgy process with carefully controlled sintering parameters produces a remarkably uniform microstructure.

Magnacut Performance Ratings

• Edge retention: ★★★★★ — Early testing suggests Magnacut rivals or exceeds S90V and 20CV, two of the best edge-holding steels in existence
• Toughness: ★★★★★ — This is where Magnacut truly breaks new ground. It appears to be as tough as S35VN or CPM-3V while offering dramatically better edge retention
• Corrosion resistance: ★★★★☆ — Excellent. Not quite at the level of 14C28N or LC200N, but far better than D2 and most high-hardness tool steels
• Ease of sharpening: ★★☆☆☆ — This is Magnacut's weakness. Its extreme wear resistance makes it very difficult to sharpen, requiring diamond stones or ceramic media. Budget 30-45 minutes for initial sharpening.
• Stain resistance: ★★★★☆ — Very good in everyday use

Hardness and Heat Treatment

Magnacut is typically hardened to 62-64 HRC. This is harder than most production knife steels but within the range achievable by high-end custom makers. The steel appears to be quite forgiving of slight variations in heat treatment, which is remarkable for such a high-performance alloy — most super steels are very sensitive to heat treatment parameters.

Chris Reeve Knives was one of the first manufacturers to adopt Magnacut, using it in the Sebenza 21 and Inkosi. Their heat treatment expertise has produced outstanding results — Knives Center's independent testing confirmed that Magnacut Sebenzas outperformed S45VN Sebenzas in edge retention tests by a significant margin.

Magnacut vs. Other Premium Steels

Magnacut's Main Weakness: Sharpenability

The most significant practical limitation of Magnacut is its resistance to sharpening. When it gets dull (which takes a very long time), you'll need:

• Diamond stones (DMT, EZE-LAP, or similar) — these are the most effective option
• Ceramic media in a slow-speed grinder (like a Hapstone or Work Sharp)
• Patience — expect to spend 45-60 minutes restoring the edge from truly dull
• Professional sharpening services — many pros now offer Magnacut/super steel sharpening

This is a trade-off to consider: Magnacut holds its edge 3-5x longer than most steels, but when it needs sharpening, the process is significantly more labor-intensive. For many users, this is an acceptable trade-off — you sharpen 5x less often but each session takes longer.

Who Makes Magnacut Knives?

• Chris Reeve Knives — the first major adopter; Sebenza and Inkosi in Magnacut
• WE Knife/Banterian — produces Magnacut options at relatively lower prices
• Kizer — bringing Magnacut to a more accessible price point
• Custom makers — increasing numbers of makers are adopting Magnacut

Should You Buy a Magnacut Knife?

Magnacut represents the pinnacle of current knife steel technology, but it's not right for everyone:

• Buy Magnacut if: You want the absolute best performance, don't mind paying a premium, and are willing to invest in diamond sharpening tools or use professional sharpening services
• Skip Magnacut if: You're on a budget, prefer easy sharpening, or don't need the absolute best edge retention. An S35VN knife at $150 offers 90% of Magnacut's performance at a fraction of the price

For most enthusiasts, Magnacut is an aspirational steel — something to eventually own, not necessarily a first purchase. But if you can afford it and appreciate the engineering behind it, a Magnacut knife is a genuinely impressive tool.