S90V and M390 are both elite "super steels," but S90V prioritizes extreme edge retention, while M390 offers a better balance of toughness and corrosion resistance. Both use powder metallurgy for excellent overall performance, though their chemical recipes differ.
S35VN is often referred to as the ultimate "Goldilocks" steel. It isn't the absolute best at any single thing, but it is excellent at everything. It is tougher than M390, easier to sharpen, and holds an edge far longer than budget steels like 440C or D2.
Navy SEALs rely on a few specific standard-issue fixed blades, but they largely carry mission-dependent gear. Standard-issue knives include the Ontario MK3 Mod 0 dive knife and the Cold Steel SRK. For everyday carry and field operations, operators frequently choose rugged folding knives from premium brands.
Blade Steel: CPM-S90V. CPM-S90V is a high-performance stainless steel known for its remarkable wear resistance, excellent edge retention, and substantial corrosion resistance, making it one of the most sought-after steels in the knife industry.
Disadvantages of Böhler M390
Wear and tear resistant namely also means hard to modify. As such you need more time to modify it, but your sanding belts will also wear out a lot faster. A knife made from M390 steel is therefore often more expensive than a knife made from a different type of steel.
Toughness. M390 offers better toughness and is less prone to chipping under stress. CPM-S90V is harder but more brittle, meaning it can chip if subjected to heavy impact or lateral stress. For applications involving rough handling or unpredictable conditions, M390 provides greater reliability.
Steel that does not rust is called stainless steel. It doesn't rust because it contains at least 11% chromium. When exposed to oxygen, the chromium forms an invisible, self-healing shield of chromium oxide that prevents the underlying iron from oxidizing and rusting.
Neither is definitively "better," as they are designed for different priorities. MagnaCut is a superior all-around steel with incredible toughness and corrosion resistance, while S90V excels if your only goal is maximum edge retention.
In the high-end folding knife community, the original "Holy Trinity" refers to three legendary American makers who pioneered the modern premium tactical folder. Together, their designs set the gold standard for durability and precision.
CPM-S90V is considered difficult to sharpen compared to standard knife steels due to its massive amount of vanadium carbides, which are highly wear-resistant. However, with the right abrasives, the process becomes manageable.
The CIA doesn't issue a single, official knife to its personnel; instead, operatives typically carry versatile, non-metallic, or concealable blades suited for specific missions. Historic and publicly recognized blades range from the famous Cold Steel Kobun used during Operation Jawbreaker to highly covert non-detectable tools.
The official and iconic knife of the U.S. Army Special Forces is the Yarborough Knife (manufactured by Chris Reeve Knives). Designed by renowned knife-maker William Harsey, it is a heavy-duty fixed-blade combat/survival knife. Every graduate of the Special Forces Qualification Course is authorized to receive a serialized, sterile-numbered Yarborough.
John Wick famously wields a signature series of high-end, out-the-front (OTF) automatic knives in his movies. The specific knives vary depending on the film, transitioning from production models by Microtech Knives in the first three movies to a highly exclusive custom blade in the fourth.
MagnaCut offers the highest toughness, with 8 to 10+ ft-lb in Charpy testing, while maintaining strong corrosion resistance despite lower chromium content. M390 prioritizes edge retention through high carbide volume, but has lower toughness and is more prone to microchipping.
Neither steel is objectively "better" overall; they simply excel at different things. The choice depends on your priorities: German steel is better for heavy-duty durability and low maintenance, while Japanese steel is better for razor-sharp precision and edge retention.
Does M390 chip or wear out quickly? Under normal use, M390 is highly wear-resistant and chip-resistant. However, like any high-hardness steel, misuse can lead to micro-chipping, especially at overly thin edge geometries or when used for prying or twisting.
In many cultures, giving someone a knife or another sharp object is thought to symbolically cut or sever the bond between giver and receiver. The knife's sharp edge represents division, which can be interpreted as bringing misfortune to a friendship, romantic relationship, or family tie.
Under Penal Code 21510 PC, butterfly knives are considered a form of a switchblade and are illegal in California. Specifically, it is a crime to carry, possess in public, sell, or otherwise transfer a butterfly knife.
The Holy Grail of Pocket Knives
The Sebenza 31 is the latest version of a pocket knife that was first released in 1987 and is widely considered among blade enthusiasts as the best pocket knife ever made.
Cons of Damascus Steel Knives
In standardized cutting tests (rope, cardboard, etc.), MagnaCut typically outperforms 3V by 20-40% in total cutting length before the edge degrades to a set sharpness level. In Charpy impact tests, 3V consistently scores higher than MagnaCut, though both are in the "extremely tough" category.
An American steel from Crucible, CPM-S90V is one of the top super steels of today. It features incredible edge retention and wear resistance, and very high corrosion resistance. It is a very expensive steel, and only comes in top of the line knives.
Platinum and palladium are both widely considered to be approximately 30 times rarer than gold in the Earth's crust. Because of their scarcity, they are highly sought after for both investment purposes and demanding industrial applications like catalytic converters and hydrogen fuel cells.
Yes, but it is best used as a temporary solution. The original formula is designed to displace water and provides short-term protection, but dedicated anti-rust products are better for long-term use.
Stainless steel and chlorine do not belong together. Quite the contrary. We can safely say that chlorine and chlorine products are among the greatest enemies of stainless steel - certainly of the most commonly used quality, SS 304.