In the world of high-performance knives, few steels command as much respect as CPM-S90V. Produced by Crucible Industries in the United States, this premium stainless tool steel is engineered with a singular focus: delivering best-in-class edge retention for users who demand their everyday carry (EDC) tools keep cutting long after other blades have dulled.
If your daily tasks involve cutting abrasive materials like cardboard, rope, or fibrous vegetation, CPM-S90V is a material you need to know about. In this guide, we'll explore what makes this steel so special, how it stacks up against other popular blade materials, and highlight five outstanding knives from different manufacturers that showcase the extraordinary cutting longevity of CPM-S90V.
What Is CPM-S90V Steel?
CPM-S90V is a high-alloy martensitic stainless steel produced using Crucible's proprietary Crucible Particle Metallurgy (CPM) process. This advanced manufacturing method atomizes molten steel into fine powder before consolidating it under immense heat and pressure, creating a remarkably uniform distribution of very fine carbides throughout the steel matrix.
The chemistry of CPM-S90V is where its extreme performance begins. It boasts an exceptionally high 2.3% carbon content, along with a massive 9% vanadium, 14% chromium, and 1% molybdenum. The high vanadium content promotes the formation of extremely hard vanadium carbides instead of chromium carbides, dramatically enhancing the steel's wear resistance while leaving more free chromium available to provide superior corrosion resistance.
What truly sets CPM-S90V apart is its ability to hold a working edge through incredibly demanding use. Its hardness typically ranges from 58 to 61 HRC, and the fine, uniform carbide structure delivers exceptional edge retention and abrasion resistance that humbles even legendary tool steels like D2. For users who are willing to invest in proper sharpening equipment (diamond abrasives are highly recommended), CPM-S90V rewards with cutting longevity that few other steels can match.
How CPM-S90V Compares to Other Knife Steels
Understanding where CPM-S90V sits in the broader landscape of blade steels explains why it has earned such a loyal following.
CPM-S90V vs. CPM-S30V / S35VN: CPM-S90V offers dramatically better edge retention and wear resistance than both S30V and S35VN, thanks to its significantly higher vanadium content. However, it is more challenging to sharpen and less tough than these more balanced stainless steels. Choose S90V when maximum cutting longevity is your priority.
CPM-S90V vs. CPM-S110V: Both are edge-retention monsters, with S110V containing even more vanadium and niobium. In practical use, S110V offers slightly better wear resistance, but many users find S90V easier to sharpen and less prone to chipping. For a high-performance stainless steel that balances extreme edge holding with reasonable maintenance, S90V hits a sweet spot.
CPM-S90V vs. M390 / 20CV: These high-vanadium stainless "super steels" are renowned for excellent edge retention and corrosion resistance. CPM-S90V offers comparable wear resistance while delivering a slightly different carbide structure. The choice often comes down to brand availability and personal preference.
CPM-S90V vs. MagnaCut: MagnaCut was engineered to balance toughness, edge retention, and near-perfect corrosion resistance. While MagnaCut offers better toughness and easier sharpening, CPM-S90V remains the specialist's choice for pure, unadulterated edge retention. For users who prioritize maximum cutting longevity above all else, S90V still holds the crown.
5 Outstanding CPM-S90V Knives Worth Carrying
Here are five exceptional knives that showcase why CPM-S90V continues to be a favorite among discerning knife enthusiasts. Each brings something unique to the table while delivering the legendary edge retention this steel is known for.
1. Spyderco Sage 6 (Button-Release Compression Lock) – Folding Knife
The Spyderco Sage 6 represents the sixth installment in Spyderco's unique Sage Series, and it's one of the most innovative folding knives to feature CPM-S90V steel. This limited Sprint Run expression showcases the Button-Release Compression Lock pioneered by custom knifemaker Kevin Smock—a novel variation that makes closing the knife simpler and establishes it as one of Spyderco's most "fidget-friendly" models. The 3.0-inch full-flat-ground blade is crafted from CPM-S90V particle metallurgy stainless steel, offering a superior blend of edge retention and corrosion resistance. Solid carbon fiber scales with peel-ply texture provide a secure, non-slip grip while keeping the knife remarkably lightweight. A reversible deep-pocket wire clip supports discreet tip-up carry on either side. For those seeking a premium EDC tool that combines cutting-edge lock technology with elite steel performance, the Sage 6 delivers in every way.
2. Benchmade 865BK-01 Mini Bedlam – Folding Knife
The Benchmade Mini Bedlam brings tactical capability and bold styling to the CPM-S90V lineup. Inspired by its full-sized counterpart, this compact folder features a 3.45-inch upswept scimitar-style blade with a durable graphite Cerakote finish that excels in slicing, hooking, and utility cuts—perfect for EDC, field work, and tactical response. The layered coyote, black, and OD green G10 handle scale is precision-machined with aggressive texturing for a firm, reliable grip under pressure. Benchmade's legendary AXIS Lock provides smooth, ambidextrous manual operation and rock-solid lockup. With a rugged aesthetic, compact design, and top-tier materials, the Mini Bedlam is built for reliability in real-world situations—a tool that looks as capable as it performs.
3. Jack Wolf Knives Backwoods FIXedc – Fixed Blade
The Jack Wolf Knives Backwoods FIXedc is a modern take on the fixed-blade EDC concept—no outdoor clichés, no tactical attitude, just a compact fixed blade intentionally designed as a complement to your favorite folder. Developed in collaboration with environmental educator Melissa "Backwoods" Miller, the blade is made from CPM-S90V high-performance steel and finely ground for optimal everyday cutting tasks. It excels at precise cuts and long-term performance with minimal need for resharpening. A key part of the concept is the leather sheath with an integrated pocket clip, allowing discreet pocket carry without the need for a belt. Compact, slim, and perfectly suited for days when a fixed blade simply makes more sense, the Backwoods FIXedc delivers Jack Wolf's signature blend of design and everyday usability.
4. Benchmade Flyway 15700-01 – Fixed Blade
The Benchmade Flyway 15700-01 is a precision-engineered fixed blade designed specifically for upland game and waterfowl hunting—though its compact size and exceptional performance make it a compelling EDC option as well. Featuring a 2.7-inch straight-back blade crafted from CPM-S90V stainless steel, this knife provides exceptional edge retention and corrosion resistance in the field. Benchmade's SelectEdge technology applies a 14-degree edge for superior slicing efficiency, while the OD Green G10 handle with orange accent rings offers ergonomic comfort and high visibility. Weighing just over two ounces, the Flyway is light enough for all-day carry yet robust enough for detailed tasks like breasting out game birds or processing small game. The included orange Boltaron sheath provides secure storage and quick access. For hunters and outdoor enthusiasts who demand precise, reliable performance, the Flyway delivers.
5. Manly Wasp Slip Joint – Folding Knife
The Manly Wasp Slip Joint proves that exceptional steel doesn't require a tactical or modern aesthetic—sometimes the best performance comes in a classic, understated package. Hailing from Bulgaria, Manly has quietly built a reputation for crafting robust, reliable tools, and the Wasp combines a traditional slip joint design with the incredibly wear-resistant CPM-S90V steel. The satin-finished blade provides exceptional edge retention for demanding outdoor tasks, while the black G10 handle offers a secure, comfortable grip. The action is smooth with a definitive "snap" on opening and closing, exuding a sense of quality craftsmanship. For those who appreciate the simplicity and inherent safety of a slip joint but demand modern steel performance, the Wasp offers a perfect balance of tradition and cutting-edge technology at an accessible price point.
Why CPM-S90V Deserves a Place in Your Collection
The knife world loves chasing the latest "super steel," but CPM-S90V has stood the test of time for good reason. Introduced in the early 2000s as an evolution of CPM-440V (S60V), it was specifically engineered to address the shortcomings of its predecessor—offering improved toughness without compromising the impressive wear resistance associated with high-vanadium steels. The result is a steel that delivers edge retention that borders on supernatural, corrosion resistance that outperforms 440C, and wear resistance that humbles D2 tool steel.
What makes CPM-S90V particularly compelling is its availability across a wide range of knife styles and brands. From the innovative button-lock mechanism of the Spyderco Sage 6 to the classic slip joint simplicity of the Manly Wasp, there's a CPM-S90V tool that fits nearly every preference and use case. For users who prioritize maximum cutting longevity and are willing to invest in proper sharpening equipment, CPM-S90V offers performance that few other steels can match.
