Blade steel is the first thing most knife buyers ask about, and the alphabet soup on a spec sheet (S30V, M390, 20CV, MagnaCut, D2) can make a simple purchase feel like a chemistry exam. This guide cuts through it. We'll cover what steel actually changes about a knife, compare the steels you'll see most often on our shelves, and help you match a steel to how you really use your knife.
The short version: there is no single "best" steel. Every steel trades some edge retention, toughness, rust resistance and ease of sharpening against the others. The right steel is the one whose trade-offs fit your carry.
The Four Things Steel Changes
- Edge retention – how long the blade stays sharp while cutting. High-wear steels like S90V and Maxamet can go a long time between sharpenings.
- Toughness – how well the edge resists chipping and the blade resists snapping under impact, prying or twisting. Tough steels are the better pick for hard use and fixed blades.
- Corrosion resistance – how well the blade fights rust and staining. In South Louisiana humidity, or anywhere near saltwater, this matters more than most people think.
- Ease of sharpening – how quickly you can bring the edge back. Generally, the longer a steel holds an edge, the more work it is to resharpen.
Heat treatment and blade geometry matter just as much as the steel itself. A well-heat-treated mid-range steel from a top maker will often outperform a premium steel that was treated poorly. That's one reason we stick with brands that have earned their reputation.
Steel Comparison Chart
Ratings are relative to each other, for typical heat treatments in pocket knives.
| Steel | Tier | Edge Retention | Toughness | Rust Resistance | Easy to Sharpen |
|---|---|---|---|---|---|
| CPM-MagnaCut | Premium | High | High | Very High | Medium |
| M390 / 20CV / 204P | Premium | Very High | Medium | Very High | Low–Medium |
| CPM-S30V / S35VN / S45VN | Premium | High | Medium | High | Medium |
| CPM-S90V / S110V | Super Steel | Extreme | Low–Medium | High | Low |
| CPM-M4 / K390 | Super Steel | Very High | High | Low | Low |
| 154CM / CPM-154 | Mid-Range | Medium | Medium | High | High |
| D2 | Mid-Range | Medium–High | Medium | Low–Medium | Medium |
| 14C28N / Nitro-V | Value | Medium | High | High | Very High |
| VG-10 | Value / Mid | Medium | Medium | High | High |
| 8Cr13MoV / AUS-8 | Budget | Low | Medium | Medium–High | Very High |
| 1095 / 52100 / 80CrV2 | Carbon | Medium | Very High | Low | Very High |
| LC200N / H1 | Rust-Proof Specialty | Medium | High | Extreme | High |
The Steels You'll See Most at Cajun Knife & Gear
CPM-MagnaCut
MagnaCut is the steel everybody's talking about, and for good reason. Designed by metallurgist Dr. Larrin Thomas and made by Crucible, it combines toughness close to non-stainless tool steels with rust resistance that rivals the best stainless steels, plus strong edge retention. If you want one steel that does almost everything well, this is it. You'll find it across our lineup from makers like Benchmade, Heretic, Pro-Tech and Hinderer.
M390, CPM-20CV and CTS-204P
These three are close cousins with very similar chemistry and performance. They hold an edge for a long time, take a beautiful polish and shrug off rust. The trade-off is a little less toughness than MagnaCut and more effort at the sharpener. They're a longtime favorite on high-end autos and OTFs from Microtech and Heretic, and on frame locks from Zero Tolerance.
CPM-S30V, S35VN and S45VN
S30V was one of the first steels designed specifically for knives, and it set the standard for premium EDC blades for years. S35VN and S45VN are refinements that are a bit tougher and easier to finish. All three are a well-balanced, proven choice, and S30V is the steel on the standard Benchmade Bugout.
CPM-S90V, S110V and Other "Super Steels"
If you cut a lot of cardboard, rope or zip ties and hate sharpening, high-vanadium steels like S90V are for you. They can hold an edge several times longer than mid-range steels. Just know they're harder to sharpen (diamond or CBN stones help) and less forgiving of prying or impacts.
154CM and CPM-154
A classic American stainless that's easy to live with: good edge retention, good rust resistance and very easy to touch up. It's common on Benchmade and Pro-Tech models and is a great choice if you'd rather spend two minutes on a strop than twenty on a stone.
D2
D2 is a tool steel with excellent wear resistance for the price. It's only "semi-stainless," so it can spot in humid weather if you don't wipe it down. It's popular on hard-use and value-priced knives.
Carbon Steels (1095, 52100, 80CrV2)
Simple carbon steels are tough, take a screaming edge and are easy to sharpen in the field, which is why they're common on fixed blades, bushcraft knives and traditional pocket knives like many from Case. They will rust and develop a patina, so keep them dry and oiled.
Damascus
Damascus is pattern-welded layers of two or more steels, folded and etched to reveal the pattern. Performance depends on the steels used and the heat treat, and modern stainless Damascus can perform very well. Most buyers choose it for the looks, and it's a staple of custom and high-end knives in our Custom Shop.
Which Steel Should You Choose?
- Everyday carry, one knife for everything: MagnaCut, S35VN/S45VN or 20CV/M390.
- Fishing, boating and saltwater: LC200N, H1 or MagnaCut. Rust-resistance comes first.
- Hunting and processing game: MagnaCut, S30V or 154CM. Good edge holding, easy to touch up in camp.
- Hard use, camping and fixed blades: MagnaCut, CPM-3V, 80CrV2 or 1095. Toughness comes first.
- Work knife for boxes, rope and zip ties: S90V, M390/20CV or K390. Edge retention comes first.
- First good knife on a budget: 14C28N or Nitro-V. Excellent value and easy to sharpen.
- Collecting or gifting: Damascus or a premium steel from a custom maker.
Caring for Your Blade in Louisiana Humidity
Even "stainless" steel isn't stain-proof. Wipe your blade dry after use, especially after cutting food or getting it wet, and put a light coat of a knife-safe oil on it now and then. Carbon and semi-stainless steels like 1095 and D2 need this every time. If your knife gets dull, our knife sharpeners make it easy to keep any of these steels in shape at home.
Frequently Asked Questions
What is the best knife steel?
There's no single best, but CPM-MagnaCut is the closest thing to an all-rounder available today because it balances edge retention, toughness and rust resistance so well. The best steel for you depends on whether you value edge holding, toughness or easy sharpening most.
Is MagnaCut better than S30V?
For most users, yes. MagnaCut is tougher and more rust-resistant than S30V with similar or slightly better edge retention. S30V is still an excellent, proven steel and often comes at a lower price.
Is M390 the same as 20CV and 204P?
They're nearly identical in chemistry and performance, made by different steel companies (Böhler, Crucible and Carpenter). You can treat them as equals when shopping.
Which knife steel won't rust?
Nitrogen steels like LC200N and H1 are about as close to rust-proof as knife steel gets, which makes them ideal for saltwater. MagnaCut, M390 and 20CV are also highly resistant to rust.
Does a harder steel mean a better knife?
Not necessarily. Higher hardness generally means better edge retention but less toughness. Makers choose a hardness that suits the steel and the knife's purpose, and a good heat treat matters more than chasing a number.
Shop Knives by Steel at Cajun Knife & Gear
Still deciding? Come see us at our Lafayette store and handle a few side by side, or reach out at info@cajunknife.com and we'll point you in the right direction. Browse our folding knives, automatic knives, OTF knives and fixed blades. Orders over $125 ship free, and orders placed by 2 PM Central ship the same day.
Next up: learn how folding knives stay open in our Knife Lock Types Guide.