D2 is moderately difficult to sharpen. It is a tough, wear-resistant tool steel with large, hard carbides, meaning it holds an edge incredibly well but takes longer to abrade than softer steels.
Disadvantages of D2 Steel
Because of its high hardness and wear-resistant chromium carbides, D2 tool steel requires diamond abrasives to sharpen efficiently. Soft natural stones or basic ceramic hones take too long. The best sharpening systems cut rapidly while taking the guesswork out of holding a precise angle.
CPM-S90V is one of the steels that are really difficult to sharpen, but once sharpened the blade edge will maintain the same sharpness level for quite some time.
Some people also believe that D2 steel knives are difficult to sharpen. While D2 is a harder steel than others, such as 440C, it can still be sharpened with the right tools and techniques. It's essential to use a high-quality sharpening stone and to maintain a consistent angle throughout the sharpening process.
The correct choice depends on the failure mode. If the part fails due to wear, D2 is usually the better direction. If the part fails by cracking, bending, fatigue, or impact, 4140 is usually the safer choice.
The easiest steels to sharpen are simple carbon steels like 1095 or basic stainless steels like AEB-L. Because these metals have low wear resistance, they remove metal quickly on a stone and form an edge incredibly easily, making them perfect for beginners.
Whether CPM-S30V is "better" than D2 depends on what you need from a knife. S30V is generally considered a better all-around blade steel because it is fully stainless and holds an edge longer. D2 is a heavy-duty tool steel that is tougher and less expensive, but it can rust easily.
A US company has engineered a new type of wood that it says has up to 10 times the strength-to-weight ratio of steel, while also being up to six times lighter. “Superwood” has just launched as a commercial product, manufactured by InventWood, a company co-founded by material scientist Liangbing Hu.
Navy SEALs commonly use the Cold Steel SRK (Survival Rescue Knife) for training and the Ontario Mk3 Mod 0 for diving operations. While these are standard-issue, SEALs often choose personalized knives based on preference, such as those from Benchmade, SOG, or custom makers.
While stainless steels can be more corrosion resistant, D2 is a high carbon, high chromium tool steel with outstanding wear resistance. These blades are tough, able to maintain their integrity and avoid chipping even through the toughest of tasks.
For D2 steel, the recommended sharpening angle is 15° to 20° per side. The best angle depends on your intended use:
Here are Our Top Picks for the Best Folding and Fixed Blade D2 Steel Knives
Metals that never rust are those that do not contain iron, such as gold, platinum, and titanium, as rusting is technically the oxidation of iron. Aluminum and stainless steel are also widely used corrosion-resistant materials that do not rust, but instead form a protective oxide layer that shields the metal from further damage.
No, D2 steel does not rust easily, but it is not completely rust-proof. Often classified as a "semi-stainless" steel, it has high chromium content (around 12%) which gives it moderate-to-high corrosion resistance. It holds up well under normal use but requires basic maintenance.
Some examples of material combinations that cannot be fusion welded successfully are aluminum and steel (carbon or stainless steel), aluminum and copper, and titanium and steel. Nothing can be done to alter their metallurgical properties.
Gold is universally referred to as the "king of metals". This title honors its historical status as the ultimate store of value, its unique radiant color, and its chemical invulnerability to corrosion and rust.
Harder than diamond, stronger than steel, super conductor … graphene's unreal. Imagine a material that is just one atom thick, 300 times stronger than steel, harder than diamond, a fantastic conductor of heat and electricity and super-flexible to boot.
D2 steel is an excellent, popular choice for budget-friendly and mid-range pocket knives, offering superior edge retention and durability, particularly for everyday carry (EDC) and utility tasks. While it is highly durable, it is technically a "semi-stainless" steel, meaning it requires basic care to prevent rust.
We cannot perfectly recreate original Damascus steel (Wootz steel) because its exact ancient recipe and forging methods were lost centuries ago. The ancient process relied on specific, naturally occurring trace elements in raw materials—like vanadium and molybdenum—that are no longer used or available in the same way today.
Whether D2 is better than Damascus depends entirely on your priorities. D2 is a high-performance tool steel focused on raw cutting power and edge retention, while Damascus is a visually striking pattern-welded material whose performance depends on the specific steels used to create it.
Yes, you can use WD-40 as a lubricant on oil-based sharpening stones, but it is not the best option. Because WD-40 is very thin, it fails to effectively float away metal shavings (swarf), which can clog your stone.
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.
The "best" knife sharpener ultimately depends on your knives, skill level, and budget. For an intuitive, mess-free experience that produces a razor-sharp edge with zero skill, the Work Sharp Rolling Knife Sharpener is the best overall. If you prefer professional, guided systems, the Wicked Edge Gen 4 is unmatched.