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M2 high-speed steel (W6Mo5Cr4V2 / SKH51) is known for its high toughness, good wear resistance, and uniform carbide structure. With low carbide inhomogeneity, M2 performs well under vibration and shock loads, making it suitable for cutting tools and molds used in demanding applications.

As a molybdenum-based high-speed steel, M2 maintains high hardness and stable performance at elevated temperatures. Proper control of quenching temperature and heat treatment helps achieve the best material properties .Thanks to its balanced toughness and wear resistance, M2 high-speed steel is widely used for difficult-to-cut materials and general-purpose cutting tools.

Key Applications

Applicable to the production of drill, tap, screw die, milling cutter, gear cutter, cold die mold, and other cutting tools, and molds with high wear resistance and strength.

  • Metal cutting tools: drills, taps, milling cutters, gear cutters

  • Heavy-duty molds: punch dies, cold extrusion, and forming dies

  • Industrial components requiring high wear resistance and strength

Metal Cutting Tools

M2 Equivalent Standards & Specifications

ZEICIN Grade GB AISI JIS DIN
ZDF-M2 W6Mo5Cr4V2 M2 SKH51 1.3355

M2 Chemical Composition

Element Content (%)
C 0.80-0.90
W 5.50-6.75
Mo 4.50-5.50
Cr 3.80-4.40
V 1.75-2.20
Co –
Al –
Mn 0.15-0.40
Si 0.20-0.45
S ≤0.03
P ≤0.03

M2 Heat Treatment Process

Quenching

A process of heat treatment to increase hardness and wear resistance by rapidly cooling the steel.

Annealing

Basically, to softens the steel by relieving stress and making it easier to machine.

Tempering

When using M2 steel, tempering follows quenching in order to relieve stress and fine-tune hardness and toughness for optimum performance.

HSS M2 Isothermal spheroidizing Annealing-Quenching-Tempering graph (HRC:62-64)

M2 Microstructure

Microstructure M2 500times
Microstructure M2 100times

M2 Product Forms

ZEICIN Steel is a professional manufacturer of M2 HSS, supplying products in various forms produced by hot rolling and hot forging. Bulk supply and customized size requirements are available upon request.

Type Specification (mm) Surface Condition
Cold-drawn Round Steel Φ2–10 Black
Hot-rolled Round Steel Φ10–75 Turned
Precision Forged Round Steel Φ80–120 Turned

Why Choose ZEICIN STEEL as Your M2 Manufacturer?

🔥Excellent Hot Hardness, Wear Resistance and Stable Cutting Performance

M2 / SKH51 (1.3343) high-speed steel offers excellent hot hardness and wear resistance, maintaining stable cutting performance under high-speed, high-temperature, and heavy-duty machining conditions.

🏭 Mature Manufacturing Process and Reliable Heat Treatment Performance

Produced through a mature and stable high-speed steel manufacturing process, M2 steel features a uniform microstructure with well-distributed carbides. Combined with proper heat treatment, it achieves high hardness, good thermal stability, and strong resistance to softening at elevated temperatures.

⚙️ Balanced Toughness and Resistance to Failure

With a well-balanced combination of hardness and toughness, this grade effectively reduces the risk of edge chipping and premature failure, making it suitable for continuous and heavy-duty cutting applications.

✔️ Stable Quality Control and International Standards Compliance

Strict quality control is applied throughout the production process to ensure consistent performance across different batches. M2 / SKH51 (1.3343) high-speed steel complies with major international standards including ASTM, DIN, JIS, and GB, and is widely used in the global cutting tool and tooling industry.

Frequently Asked Questions

Yes. We accept trial orders when the required size is in stock. This allows customers to test our product quality before placing bulk orders.

If the products are in stock, delivery usually takes 5–7 days.
If the products are not in stock, delivery time is about 30–40 days, depending on the order quantity.

Yes. We offer discounts for bulk orders. The discount depends on the order volume and cooperation terms. Please contact us for detailed pricing.

Our products use standard industrial packaging to ensure safe transportation. If you need custom packaging, please let us know when placing your order.

We support several payment methods, including T/T, L/C, and PayPal. The payment method can be arranged based on the order amount and customer needs.

Yes. Material certificates and inspection reports are available upon request. We can provide chemical composition and mechanical property reports according to relevant standards.

M2 High-Speed Steel for Cutting Tools & Molds
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