20 Best S30v Steel Knives [2024]

Are you looking for the best S30v Steel Knives? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling S30v Steel Knives.

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# Preview Product
1 Kershaw Blur S30V Folding Pocket Knife (1670S30V); 3.4” S30V Blade with Stonewashed Finish and... Kershaw Blur S30V Folding Pocket Knife (1670S30V); 3.4” S30V Blade with Stonewashed Finish and...
2 Spyderco Schempp Bowie Ethnic Series Folding Knife with 3.72' CPM S30V Stainless Steel Blade and... Spyderco Schempp Bowie Ethnic Series Folding Knife with 3.72" CPM S30V Stainless Steel Blade and...
3 Spyderco Sage 5 Prestige Folding Utility Knife with 3' CPM S30V Stainless Steel Blade and Black... Spyderco Sage 5 Prestige Folding Utility Knife with 3" CPM S30V Stainless Steel Blade and Black...
4 Spyderco Brouwer Specialty Folding Knife with 2.82' CPM S30V Premium Stainless Steel Blade and Black... Spyderco Brouwer Specialty Folding Knife with 2.82" CPM S30V Premium Stainless Steel Blade and...
5 Spyderco Native Chief Knife - Black G-10 Handle with PlainEdge, Full-Flat Grind, CPM S30V Steel... Spyderco Native Chief Knife - Black G-10 Handle with PlainEdge, Full-Flat Grind, CPM S30V Steel...
6 Spyderco Yojimbo 2 Specialty Tactical Knife with 3.2' CPM S30V Steel Black Wharncliffe Blade and... Spyderco Yojimbo 2 Specialty Tactical Knife with 3.2" CPM S30V Steel Black Wharncliffe Blade and...
7 Zero Tolerance 0350 Folding Pocket Knife; 3.25” S30V Stainless Steel Blade with Black Tungsten DLC... Zero Tolerance 0350 Folding Pocket Knife; 3.25” S30V Stainless Steel Blade with Black Tungsten...
8 Spyderco Kapara Specialty Folding Pocket Knife with 3.58' CPM S30V Premium Stainless Steel Blade and... Spyderco Kapara Specialty Folding Pocket Knife with 3.58" CPM S30V Premium Stainless Steel Blade...
9 Zero Tolerance 0350TS; Folding Pocket Knife; 3.25 in. S30V Stainless Steel Blade with Tiger-Stripe... Zero Tolerance 0350TS; Folding Pocket Knife; 3.25 in. S30V Stainless Steel Blade with...
10 Spyderco Manix 2 Signature Knife with 3.37' CPM S30V Black Steel Blade and Durable Black G-10 Handle... Spyderco Manix 2 Signature Knife with 3.37" CPM S30V Black Steel Blade and Durable Black G-10...
11 Spyderco Mantra 3 Premium Flipper Utility Knife with 3.24' CPM S30V Stainless Steel Leaf-Shaped... Spyderco Mantra 3 Premium Flipper Utility Knife with 3.24" CPM S30V Stainless Steel Leaf-Shaped...
12 Spyderco Amalgam Premium Flipper Knife with 3.8' CPM S30V Stainless Steel Blade and Textured Carbon... Spyderco Amalgam Premium Flipper Knife with 3.8" CPM S30V Stainless Steel Blade and Textured...
13 Spyderco Ikuchi Flipper Folding Utility Pocket Knife with 3.26' CPM S30V Stainless Steel Blade and... Spyderco Ikuchi Flipper Folding Utility Pocket Knife with 3.26" CPM S30V Stainless Steel Blade...
14 Spyderco Native 5 Signature Folder Knife with 2.95' CPM S30V Black Steel Blade and Black FRN Handle... Spyderco Native 5 Signature Folder Knife with 2.95" CPM S30V Black Steel Blade and Black FRN...
15 Spyderco Shaman Signature Folding Knife with 3.58' CPM S30V Black Steel Blade and Black... Spyderco Shaman Signature Folding Knife with 3.58" CPM S30V Black Steel Blade and Black...
16 Spyderco Para Military 2 Signature Folding Knife with 3.42' CPM S45VN Steel Blade and Durable G-10... Spyderco Para Military 2 Signature Folding Knife with 3.42" CPM S45VN Steel Blade and Durable...
17 Spyderco Canis Folding Knife with 3.43' CPM S30V Stainless Steel Blade and Carbon Fiber G-10... Spyderco Canis Folding Knife with 3.43" CPM S30V Stainless Steel Blade and Carbon Fiber G-10...
18 Spyderco Delica 4 Lightweight Folding Knife with CPM S30V Premium Black Steel Blade and Brilliant... Spyderco Delica 4 Lightweight Folding Knife with CPM S30V Premium Black Steel Blade and Brilliant...
19 Cold Steel Code 4 Tanto pt. Plain Edge, Gray, 3.5''' Cold Steel Code 4 Tanto pt. Plain Edge, Gray, 3.5"""
20 Spyderco Para Military 2 Signature Knife with 3.42' CPM S45VN Steel Blade and Durable G-10 Handle -... Spyderco Para Military 2 Signature Knife with 3.42" CPM S45VN Steel Blade and Durable G-10 Handle...
Bestseller No. 1
Kershaw Blur S30V Folding Pocket Knife (1670S30V); 3.4” S30V Blade with Stonewashed Finish and...
  • Manufactured with premium materials and built to last a lifetime
  • Premium S30V powdered steel blade, takes and holds an extremely fine edge for increased longevity
  • Ideal for a wide variety of tasks including cleaning game, cutting rope, bushcrafting, slicing fruits and vegetables, cutting zip ties and more
  • Stonewashed blade and basic black anodized aluminum handle with grip-tape give the S30V Blur its discreet, rugged appearance for a stealthy EDC
  • The handle provides secure gripping power in almost any environment and is ideal for hunters, backpackers, fisherman, hobbyists, wilderness guides,...
Bestseller No. 2
Spyderco Schempp Bowie Ethnic Series Folding Knife with 3.72" CPM S30V Stainless Steel Blade and...
  • A Classic - Designed by renowned custom knifemaker Ed Schempp, Spyderco
  • Superior Quality - Its distinctive blade faithfully retains the broad profile, long belly, and concave clip point of the classic Bowie pattern, but...
  • Versatile - The classic "coffin-shaped" handle has a slightly "dropped" angle to allow a natural wrist angle during use.
  • More To Love - The handle blends tradition and state-of-the-art materials by combining skeletonized full stainless steel liners, carbon fiber/G-10...
  • Easy To Carry - A stout LinerLock mechanism locks the blade securely when in use and a reversible deep-pocket wire clip provides instant access and...
Bestseller No. 3
Spyderco Sage 5 Prestige Folding Utility Knife with 3" CPM S30V Stainless Steel Blade and Black...
  • High Performance - Spyderco's Sage Series is a unique family of knives that showcases its distinct specific lock mechanism and acknowledges the...
  • Safety Feature - Featuring Spyderco’s own Compression Lock mechanism, it is substantially stronger than most LinerLocks and its location allows the...
  • Easy to Use - Every Sage Series knife in the series features the same basic design parameters - a full-flat-ground, leaf-shaped CPM S30V blade, an...
  • Versatile - The Sage 5 is an extremely capable all-purpose cutting tool. It has skeletonized stainless steel liners that form the framework of the...
  • Pocket Friendly - It has open-backed construction that reduces the knife’s weight and allows easy cleaning, with a reversible deep-pocket wire clip...
Bestseller No. 4
Spyderco Brouwer Specialty Folding Knife with 2.82" CPM S30V Premium Stainless Steel Blade and Black...
  • Folding Knives - Locking folding knives are safe, compact, and easy to carry. They also happen to be where the Spyderco revolution began.
  • G-10 Handle - An epoxy filled woven glass fiber that is rigid, non-slip, and impervious to temperature changes and chemicals.
  • Titanium - A non-ferrous metal used in knife manufacturing for its high tensile strength, light weight and corrosion resistance.
  • Full-Flat Grind - This knife features a blade ground with flat bevels that extend from the spine all the way to the cutting edge. This grind reduces...
  • Specifications - Closed Length (Inches): 4, Overall Length (Inches): 6.77, Blade Length (Inches):2.77, Blade Steel: CPMS30V140, Grind: Full-Flat
SaleBestseller No. 5
Spyderco Native Chief Knife - Black G-10 Handle with PlainEdge, Full-Flat Grind, CPM S30V Steel...
  • G-10 Handle - This handle is made up of an epoxy filled woven glass fiber that is rigid, non-slip, and impervious to temperature changes and...
  • PlainEdge Blade - This knife has a sharpened blade with no serrations or teeth sometimes referred to as a smooth blade.
  • Back Lock - This locking mechanism is positioned on the back of the handle that uses a rocker arm that pivots in the center. A lug on one end of the...
  • Full-Flat Grind - This knife features a blade ground with flat bevels that extend from the spine all the way to the cutting edge. This grind reduces...
  • Specifications - Closed Length (Inches): 5.08, Overall Length (Inches): 9.08, Blade Length (Inches):4.08, Blade Steel: CPM S30V, Grind: Full-Flat
SaleBestseller No. 6
Spyderco Yojimbo 2 Specialty Tactical Knife with 3.2" CPM S30V Steel Black Wharncliffe Blade and...
  • Superior Quality - The Yojimbo 2 is an evolved expression of its original Spyderco Yojimbo design. The refined Ergonomics of the Yojimbo 2 complement...
  • Versatile - A unique attribute of the Yojimbo 2 is the thumb forward grip. It allows the 3.2" CPM S30V blade to feel like a natural extension of the...
  • Ergonomic - The PlainEdge straight cutting edge of the hollow-ground blade offers extreme cutting performance by transferring power all the way to the...
  • A Secure Grip - Our Yojimbo 2 features a textured G-10 handle and a four-position clip which allows a non-slip grip and rapid deployment from all...
  • Durable - The Yojimbo 2 has nested stainless steel liners which provide structural strength and form the backbone of the knife's high-strength...
Bestseller No. 7
Zero Tolerance 0350 Folding Pocket Knife; 3.25” S30V Stainless Steel Blade with Black Tungsten DLC...
  • High performance and premium quality S350V stainless steel makes the recurve blade extremely durable, corrosion resistant and wear resistant
  • Non-reflective black Tungsten DLC (Diamond-Like Carbon) blade coating and black G-10 handle scales cleanly pair together for a sleek, smooth,...
  • Quad-mount pocket clip convenient for left or right handed, tip-up, or tip-down carry
  • Ideal EDC, easy folding pocket knife for everyday tasks—survival tool, precision cutting, self-defense, tactical use or the perfect gift
  • General all-purpose knife great for EDC or use while working, camping, fishing, hunting, utility or any outdoor activity
Bestseller No. 8
Spyderco Kapara Specialty Folding Pocket Knife with 3.58" CPM S30V Premium Stainless Steel Blade and...
  • Folding Knives - Locking folding knives are safe, compact, and easy to carry. They also happen to be where the Spyderco revolution began.
  • Carbon Fiber - Graphic fibers (the size of a human hair) woven together then fused with epoxy resin. Lightweight with a high level of tensile strength...
  • Full-Flat Grind - This knife features a blade ground with flat bevels that extend from the spine all the way to the cutting edge. This grind reduces...
  • PlainEdge Blade - This knife has a sharpened blade with no serrations or teeth sometimes referred to as a smooth blade.
  • Specifications - Closed Length (Inches): 4.65, Overall Length (Inches): 8.25, Blade Length (Inches):3.6, Blade Steel: CPM S30V/140, Grind: Full-Flat
Bestseller No. 9
Zero Tolerance 0350TS; Folding Pocket Knife; 3.25 in. S30V Stainless Steel Blade with Tiger-Stripe...
  • High performance and premium quality S350V stainless steel makes the powerful blade extremely versatile, durable, corrosion resistant and wear...
  • Tiger-striped Tungsten DLC (Diamond-Like Carbon) blade coating and textured black G-10 handles cleanly pair together to make a wild, aggressive knife
  • Quad-mount pocketclip convenient for left or right-handed, tip-up or tip-down, carry
  • Ideal EDC, easy folding pocket knife for everyday tasks—survival tool, precision cutting, self-defense, tactical use or the perfect gift
  • General all-purpose knife great for EDC or use while working, camping, fishing, hunting, utility or outdoor activities
SaleBestseller No. 10
Spyderco Manix 2 Signature Knife with 3.37" CPM S30V Black Steel Blade and Durable Black G-10 Handle...
  • Ready for Anything - The Manix 2 is an extremely capable full-sized folder that is known for it's strength and performance. Its broad blade provides...
  • A Secure Grip - It's scaled G-10 handle has a unique non-slip checked texture. This handle provides a special kind of comfort, creating a reliable,...
  • Dependable - If you are looking for control and precision, look no more. This knife features our PlainEdge grind which is known for creating a smooth...
  • Low Friction - This knife features a blade ground with flat bevels that extend from the spine all the way to the cutting edge. This grind reduces drag...
  • High-Strength Lock - The Ball Bearing Lock features a patented compressive lock that wedges a ball bearing between a fixed anvil and the blade tang....
SaleBestseller No. 11
Spyderco Mantra 3 Premium Flipper Utility Knife with 3.24" CPM S30V Stainless Steel Leaf-Shaped...
  • Folding Knives - Locking folding knives are safe, compact, and easy to carry. They also happen to be where the Spyderco revolution began.
  • Carbon Fiber - Graphic fibers (the size of a human hair) woven together then fused with epoxy resin. Lightweight with a high level of tensile strength...
  • G-10 Handle - An epoxy filled woven glass fiber that is rigid, non-slip, and impervious to temperature changes and chemicals.
  • Full-Flat Grind - This knife features a blade ground with flat bevels that extend from the spine all the way to the cutting edge. This grind reduces...
  • Specifications - Closed Length (Inches): 4.17, Overall Length (Inches): 7.25, Blade Length (Inches):3.17, Blade Steel: CPM S30V, Grind: Full-Flat
Bestseller No. 12
Spyderco Amalgam Premium Flipper Knife with 3.8" CPM S30V Stainless Steel Blade and Textured Carbon...
  • High Performance - Designed from the ground up as a practical, versatile working knife, the Amalgam combines all the advantages of Spyderco
  • Ergonomic - The Amalgam's handle features skeletonized stainless steel liners nested into textured carbon fiber/G-10 laminate scales.
  • Superior Quality - The brainchild of a Mechanical Engineering student and knife enthusiast named Brian Lai, the Amalgam features a broad, drop-point...
  • Versatile - It also rides on special low-friction ball-bearing washers that give it an incredibly smooth action and help ensure swift, positive,...
  • Pocket-Friendly - It features a four-position clip and lined lanyard hole support all possible carry preferences. This allows the Amalgam to be...
SaleBestseller No. 13
Spyderco Ikuchi Flipper Folding Utility Pocket Knife with 3.26" CPM S30V Stainless Steel Blade and...
  • Game Changer - Designed by Paul Alexander, the Ikuchi has an elegantly curved handle crafted with full, skeletonized stainless steel liners and...
  • Ergonomic - In the closed position, the handle
  • Easy-to-Use Lock - Stroking this section of the blade with an index finger or thumb provides leverage to swiftly pivot it into the open position,...
  • Pocket-Friendly - To ensure discreet carry while keeping the Ikuchi instantly accessible, its handle includes a low-profile, deep-pocket wire clip...
  • Superior Quality - The satin-finished CPM
Bestseller No. 14
Spyderco Native 5 Signature Folder Knife with 2.95" CPM S30V Black Steel Blade and Black FRN Handle...
  • AN IMPROVED CLASSIC - The Native model has been a mainstay of Spyderco's product line for years as a result of it's superior quality and...
  • USA-MADE - Spyderco takes tremendous pride in every knife we make, but the ones crafted in our Golden, Colorado factory are special because we invest...
  • LIGHT AND DURABLE - This Native 5 handle is fabricated with Fiberglass Reinforced Nylon. FRN is a polymer mixed with glass fiber that is injection...
  • DOUBLE DUTY BLADE - This blade includes both our PlainEdge and SpyderEdge grinds. This CombinationEdge blade offers powerhouse cutting performance on...
  • ULTRA CORROSION RESISTANT - Diamond-Like Carbon Coating is combined diamond and graphite used for blades and parts. This coating offers high corrosion...
Bestseller No. 15
Spyderco Shaman Signature Folding Knife with 3.58" CPM S30V Black Steel Blade and Black...
  • SHAMAN - The Shaman offers advanced ergonomics and proven design dynamics. The soul of this design is its CPM S30V stainless steel blade, which...
  • G-10 Handle - An epoxy filled woven glass fiber that is rigid, impervious to temperature changes and chemicals and can be tinted into different...
  • Full-Flat Grind - This knife features a blade ground with flat bevels that extend from the spine all the way to the cutting edge. This grind reduces...
  • Spyderedge Blade - Spyderco's two-step serration patterns consisting of one large and two small serrations. The pattern increases the cutting edge's...
  • Specifications - Closed Length (Inches): 4.7, Overall Length (Inches): 8, Blade Length (Inches):3.58, Blade Steel: CPM S30V, Grind: Full-flat
Bestseller No. 16
Spyderco Para Military 2 Signature Folding Knife with 3.42" CPM S45VN Steel Blade and Durable G-10...
  • An Improved Classic - Undeniably one of Spyderco's most popular and in-demand designs, the Para Military 2 distills the world-class performance of our...
  • Superior Quality - We kept the same high-performance full flat-ground blade but we've also lengthened the blade's tip and added additional surface...
  • A Secure Grip - The G-10 handle is narrowed at the end improving the Ergonomics. The handle and blade have been profile thinner; removing...
  • Easy-to-Use - The Para Military 2 features extreme strength, reliability, and ease of use of our patented Compression Lock mechanism and versatility...
  • Dependable - Refinements to overall construction may not be drastic but from the G-10 textured handle to the steel full flat blade, everything is...
Bestseller No. 17
Spyderco Canis Folding Knife with 3.43" CPM S30V Stainless Steel Blade and Carbon Fiber G-10...
  • Iconic Design - The Canis is a no-nonsense folding knife optimized for personal protection. Designed by Kelly McCann, one of the world's leading...
  • PRECISE AND RELIABLE - Its dramatic CPM S30V stainless steel blade combines a straight, Wharncliffe-style edge with narrow bevels, a reinforced tip,...
  • Superior Quality - The Ergonomic handle features peel-ply-textured carbon fiber/G-10 laminate scales and nested stainless steel liners
  • Pocket-Friendly - The Canis offers a versatile four-position clip that supports all possible carry options. choice of tip-up or tip-down carry on both...
  • The New EDC - While it was unapologetically designed to excel as a personal-protection tool, it is equally at home as a utilitarian, everyday-carry...
Bestseller No. 18
Spyderco Delica 4 Lightweight Folding Knife with CPM S30V Premium Black Steel Blade and Brilliant...
  • RELIABLE HIGH PERFORMANCE - The Delica 4 family includes a full range of handle colors, blade grinds, and edge configurations, as well as a blunted...
  • SUPERIOR BLADE STEEL - The CPM S30V premium steel blade has a full flat grind with a stronger tip and larger 13mm opening hole.
  • ULTRA-LIGHTWEIGHT - Inside the handle are dual skeletonized stainless steel liners which strengthen the knife without additional weight and double as...
  • ERGONOMIC - Added to the blade's spine is slip resistant jimping. Phosphor bronze washers smooth out the open/close action and the clip is upgraded to...
  • A SECURE GRIP - Molded onto the FRN handle's surface is Bi-Directional Texturing for slip-free tactile traction. It provides resistance to slipping in...
Bestseller No. 19
Cold Steel Code 4 Tanto pt. Plain Edge, Gray, 3.5"""
  • "overall length 8 1/2"
  • "blade length 3 1/2"
  • blade thickness 3. 5mm
  • steel/material s35vn
Bestseller No. 20
Spyderco Para Military 2 Signature Knife with 3.42" CPM S45VN Steel Blade and Durable G-10 Handle -...
  • An Improved Classic - Undeniably one of Spyderco's most popular and in-demand designs, the Para Military 2 distills the world-class performance of our...
  • Superior Quality - We kept the same high-performance full flat-ground blade but we've also lengthened the blade's tip and added additional surface...
  • A Secure Grip - The G-10 handle is narrowed at the end improving the Ergonomics. The handle and blade have been profile thinner; removing...
  • Easy-to-Use - The Para Military 2 features extreme strength, reliability, and ease of use of our patented Compression Lock mechanism and versatility...
  • Dependable - Refinements to overall construction may not be drastic but from the G-10 textured handle to the steel full flat blade, everything is...

Having trouble finding a great S30v Steel Knives?

This problem is well understood by us because we have gone through the entire S30v Steel Knives research process ourselves, which is why we have put together a comprehensive list of the best S30v Steel Knivess available in the market today.

After hours of searching and using all the models on the market, we have found the best S30v Steel Knives for 2023. See our ranking below!

How Do You Buy The Best S30v Steel Knives?

Do you get stressed out thinking about shopping for a great S30v Steel Knives? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching S30v Steel Knives, which is why we have assembled a comprehensive list of the greatest S30v Steel Knives available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for S30v Steel Knives that you consider buying. Your questions might include the following:

  • Is it worth buying an S30v Steel Knives?
  • What benefits are there with buying an S30v Steel Knives?
  • What factors deserve consideration when shopping for an effective S30v Steel Knives?
  • Why is it crucial to invest in any S30v Steel Knives, much less the best one?
  • Which S30v Steel Knives are good in the current market?
  • Where can you find information like this about S30v Steel Knives?

We’re convinced that you likely have far more questions than just these regarding S30v Steel Knives, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for S30v Steel Knives, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible S30v Steel Knives. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an S30v Steel Knives buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available S30v Steel Knives currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of S30v Steel Knives has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an S30v Steel Knives?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your S30v Steel Knives.
  5. Customer Ratings: Number ratings grade S30v Steel Knives objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their S30v Steel Knives.
  7. Product Quality: You don’t always get what you pay for with an S30v Steel Knives, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an S30v Steel Knives is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining S30v Steel Knives information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding S30v Steel Knives is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

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FAQ:

Q: What should I get to sharpen S30V?

A: dakota1820. I bought a new Smith’s knife sharpening system and still my s30v knife is difficult and takes a long time to sharpen does anybody else have this particular issue … Quiet. Uhhh…which knife? … GatorFlash1. … arty. … TravisH. … Alberta Ed. … Obsessed with Edges. … bgentry. … FW JSB. … FW JSB. …

Q: Where to buy S30V steel?

A: CPM S30-V .070 (1/16”) Previous: N/A Current: N/A CPM S30-V .094 (3/32”) Previous: N/A Current: NR65980 CPM S30-V .125 (1/8”) Previous: NR69408

Q: How to sharpen S30V?

A: Sharpening freehand is not that difficult, just try to maintain an even angle — an angle guide is useful. Diamond hones are the most efficient way of sharpening steels with high carbide content (D2, S30V, CTS-XHP and other powder steels), and will work equally well on high carbon and non-powder stainless steels with lower carbide content.

Q: Is S30V that great?

A: Wear Resistance: Maybe one of the best steels in wear resistance, being high in vanadium and Chromium, S30V is a great steel for wear resistance. Sharpness: the sharpening of the CPM S30V is not an easy task, the harder the steel, the harder to sharpen it.