M4 Steel: Why It’s a Top Pick for Knife Makers

 CPM M4 steel is a high-performance tool steel loved by knife makers for its toughness and edge retention. In this guide, we’ll explore what makes M4 special, its pros and cons, and if it’s right for your knife. Compare it to other steels like , , , or . We’ll also recommend a top M4 knife on Amazon.

What Is M4 Steel?

CPM M4, made by Crucible Industries, is a high-carbon tool steel with: Carbon (1.42%) for hardness; Vanadium (4.00%) and Tungsten (5.50%) for wear resistance; Molybdenum (5.25%) for strength; Chromium (4.00%) for some corrosion resistance. At 62-64 HRC, it’s a non-stainless steel built for extreme durability.

M4 Steel Performance: Pros and Cons

Edge Retention: Elite Performance

M4’s exceptional edge retention beats S30V (Knives) and D2 (Knives), thanks to its vanadium and tungsten. It’s ideal for heavy cutting tasks.

Corrosion Resistance: Needs Care

With only 4% chromium, M4 rusts easily. It’s less corrosion-resistant than N690 () or S30V—oil it after use.

Toughness: Surprisingly Strong

M4 offers great toughness for its hardness, outpacing S30V but not D2. It handles chopping without chipping.

Ease of Sharpening: Challenging

M4 is hard to sharpen due to its hardness. It’s tougher than K390 ()—use diamond stones.

Wear Resistance: Top-Tier

M4’s excellent wear resistance makes it a favorite for hard-use knives, rivaling K390.

Best M4 Steel Knife: Toor Knives Mullet S

The Toor Knives Mullet S showcases M4’s strengths.

• Blade: Short swerve grind in CPM M4 at 62-64 HRC, reinforces the tip for tough surfaces.
• Handle: Designed for a secure grip during heavy use.
• Use: Ideal for tactical or survival tasks.

It’s a beast for cutting but needs rust prevention due to M4’s properties.

Where to Buy

Get the Toor Knives Mullet S on Amazon. Click here to support this blog (affiliate link).

M4 vs. Other Steels

M4 vs. D2—M4 has better edge retention, D2 is tougher (); M4 vs. S30V—M4 excels in wear, S30V in corrosion resistance (); M4 vs. K390—Similar edge retention, K390 is harder to sharpen ().

Is M4 Steel Good for Knives?

Yes—M4 is excellent for: Hard Use—Tough and sharp; EDC—Durable for daily tasks; Enthusiasts—A premium steel. If rust is a concern, try N690 .

Caring for Your M4 Steel Knife

1. Clean It—Wipe after use; 2) Oil It—Prevent rust; 3) Sharpen It—Use diamond stones.

Final Verdict: Should You Buy an M4 Steel Knife?

M4 steel is a top pick for its toughness and edge retention. The Toor Knives Mullet S is a great choice. Compare with K390 , S30V , N690 , or D2 . Grab it on Amazon here (affiliate link). Share your thoughts below!