M390 Steel Explained: Super Steel Performance & Value

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 When it comes to premium knife steels, M390 stands out as a "super steel" that blends exceptional performance with real-world value. Manufactured by Bohler, this high-end stainless steel has earned a loyal following among knife enthusiasts, collectors, and professionals. But what makes M390 so special? In this guide, we’ll break down its composition, properties, and why it’s a top choice for EDC, outdoor, and tactical blades in 2025.

What is M390 Steel?

M390 is a martensitic stainless steel developed through Bohler’s Microclean process, a third-generation powder metallurgy technique. It’s packed with high levels of chromium (20%), vanadium (4%), and carbon (1.9%), giving it a unique edge over other steels. This composition delivers outstanding corrosion resistance, edge retention, and wear resistance—qualities that define a super steel.

Key Properties of M390 Steel

  • Edge Retention: Thanks to its vanadium carbides, M390 holds a sharp edge through heavy use, outlasting many steels like D2.
  • Corrosion Resistance: With 20% chromium, it resists rust even in humid or salty environments.
  • Toughness: While not as tough as M4, M390 balances durability with hardness (typically 60-62 HRC).
  • Sharpenability: It’s trickier to sharpen than softer steels like 14C28N, but with the right tools, it’s manageable.

For a deeper dive into hardness, check out our upcoming guide What is Rockwell Hardness in Knives (And Why It Matters) under Knife Steel Guides.

Why Choose M390 Steel?

M390 shines in premium knives where performance justifies the cost. It’s a favorite in brands like Benchmade and Zero Tolerance, often seen in sleek EDCs like the Benchmade Tagout 533 (though that model uses CPM S30V). Its edge retention rivals K390, but with better corrosion resistance, making it ideal for wet conditions. Compare it head-to-head in our planned Elmax vs M390 Steel piece under Comparisons.

Pros and Cons

Pros:

  • Exceptional edge retention
  • High corrosion resistance
  • Premium feel and performance

Cons:

  • Higher cost than budget steels
  • Requires skill to sharpen

M390 in Action

Imagine slicing through rope, cardboard, or game with minimal edge wear—M390 delivers. It’s not as budget-friendly as CPM S30V, but its longevity adds value. Want to see M390 in a top-tier knife? Check out this Zero Tolerance knife with M390 steel on Amazon—a perfect example of its premium quality. For care tips, see our upcoming Flattening Your Sharpening Stones: Why and How in Knife Care & Tips.

Is M390 Worth It?

If you’re after a high-performance steel that lasts, M390 is a smart investment. It’s not the toughest (see M4 for that), but its balance of qualities makes it a super steel for 2025. Explore more steels in our next guide, , or dive into reviews like the Spyderco Police 4 Lightweight under Knife Reviews.

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