M390 Super Steel: High-Performance Wear and Corrosion Resistance

2025-02-17 15:17

M390 is a premium martensitic stainless steel known for its outstanding wear resistance, edge retention, and corrosion resistance. Developed by Böhler-Uddeholm, M390 is widely used in high-end knives, cutting tools, and industrial applications requiring superior performance.

Chemical Composition and Properties

Element	Composition (%)
Carbon (C)	1.90
Chromium (Cr)	20.00
Molybdenum (Mo)	1.00
Vanadium (V)	4.00
Tungsten (W)	0.60
Silicon (Si)	≤ 0.70
Manganese (Mn)	≤ 0.30
Iron (Fe)	Balance

Key Features of M390 Steel

Superior Edge Retention – Maintains sharpness longer than most steels.
Outstanding Corrosion Resistance – High chromium content ensures durability in harsh environments.
Excellent Wear Resistance – Performs well under extreme cutting and abrasive conditions.
High Hardness – Achieves 60-62 HRC after proper heat treatment.
Fine Grain Structure – Ensures better toughness and machinability compared to other high-carbide steels.

Applications of M390 Steel

Industry	Applications
Knife Making	High-end folding knives, fixed blades, and custom knives.
Cutting Tools	Industrial blades, scalpels, and high-precision cutting tools.
Aerospace	Corrosion-resistant components for extreme conditions.
Medical Tools	Surgical instruments requiring long-lasting sharpness.
Automotive	High-wear parts such as bearings and injection molding tools.

Advantages of M390 Over Other Steels

Comparison	M390 Super Steel	Other Steels
Edge Retention	Superior	Less than M390
Corrosion Resistance	Excellent	Moderate (e.g., D2)
Wear Resistance	Outstanding	Lower in standard tool steels
Toughness	Moderate	Higher in steels like CPM-3V
Sharpness	High	Similar to premium stainless steels
Ease of Sharpening	Harder to sharpen	Easier in softer steels

FAQ: M390 Steel

Question	Answer
Q1: How does M390 compare to S30V or S90V?	M390 offers better edge retention and corrosion resistance than S30V and a better balance of toughness than S90V.
Q2: Is M390 difficult to sharpen?	Yes, due to its hardness, but it retains sharpness much longer than standard steels.
Q3: What makes M390 a ‘super steel’?	Its high vanadium carbide content enhances wear resistance and durability.
Q4: Can M390 rust?	While highly corrosion-resistant, prolonged exposure to extreme moisture and neglect can cause minor oxidation.
Q5: What heat treatment is ideal for M390?	Hardened to 60-62 HRC using controlled heat treatment ensures optimal performance.
Q6: Is M390 good for everyday carry (EDC) knives?	Yes, it’s a top choice for premium EDC knives due to its long-lasting sharpness.
Q7: How does M390 perform in extreme temperatures?	It retains strength and wear resistance even under high-temperature conditions.

Conclusion

M390 is one of the best-performing steels for high-end knives, precision tools, and industrial applications. With exceptional edge retention, superior wear resistance, and outstanding corrosion resistance, it is a top-tier choice for professionals who demand the best in durability and performance.