M2 Tool Steel

M2 Tool Steel is a high-speed steel renowned for its excellent hardness, wear resistance, and toughness. It is part of the tungsten-molybdenum (W-Mo) high-speed steel family, providing exceptional cutting performance and durability, even under high temperatures. The high tungsten, molybdenum, chromium, and vanadium content in M2 contributes to its hardness, allowing it to retain a sharp edge for extended periods, making it ideal for cutting and machining applications.

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our M2 Tool Steel Supply: Available Forms and Sizes

Form	Thickness / Diameter	Width	Length
M2 Tool Steel Sheets	1 mm – 20 mm	300 mm – 1000 mm	1000 mm – 3000 mm
M2 Tool Steel Plates	10 mm – 80 mm	500 mm – 1200 mm	1000 mm – 3000 mm
M2 Tool Steel Round Bars	5 mm – 300 mm diameter	N/A	1000 mm – 6000 mm
M2 Tool Steel Flat Bars	3 mm – 50 mm thickness	20 mm – 400 mm	1000 mm – 6000 mm
M2 Tool Steel Square Bars	10 mm – 200 mm	10 mm – 200 mm	1000 mm – 3000 mm
M2 Tool Steel Blocks	Customizable thickness	Customizable	Customizable

As a professional and trusted m2 tool steel supplier, Sino-Specialmetal ensures high-quality M2 Tool Steel with a wide range of customizable forms and sizes to meet industry standards and client needs. Our expertise and commitment to quality make us a reliable partner for tool steel supply. Let us know if you have additional specifications or custom requirements!

M2 Tool Steel material properties datenblatt as below:

chemical composition of M2 Tool Steel

Element	Content (%)
Carbon (C)	0.78 – 0.88
Tungsten (W)	5.50 – 6.75
Molybdenum (Mo)	4.50 – 5.50
Vanadium (V)	1.75 – 2.20
Chromium (Cr)	3.75 – 4.50
Manganese (Mn)	0.15 – 0.40
Silicon (Si)	0.20 – 0.45
Phosphorus (P)	0.03 max
Sulfur (S)	0.03 max

Physical Properties of M2 Tool Steel

Physical Property	Value
Density	8.1 g/cm³
Thermal Expansion	9.4 x 10⁻⁶ /°C (20-100°C)
Thermal Conductivity	23.0 W/m·K at 20°C
Specific Heat Capacity	420 J/kg·K
Electrical Resistivity	0.51 x 10⁻⁶ Ω·m
Melting Point	1,430 – 1,480°C

Mechanical Properties of M2 Tool Steel

Mechanical Property	Value
Hardness (Rockwell)	62 – 65 HRC (after heat treatment)
Tensile Strength	Approximately 2,000 MPa
Yield Strength	Approximately 1,500 MPa
Modulus of Elasticity	220 GPa
Impact Toughness	Moderate (suitable for high-speed cutting)
Compressive Strength	High (resists deformation under load)

Applications of M2 Tool Steel:

Drill Bits and End Mills: Ideal for high-speed drilling and milling due to its hardness and wear resistance.
Lathe Tools and Cutting Blades: Retains sharp edges under high temperatures, suitable for precision cutting.
Punches and Dies: Used in forming operations requiring impact resistance and durability.
Reamers and Broaches: Maintains edge retention and accuracy for detailed machining tasks.
Saw Blades: Suitable for high-speed saws where prolonged sharpness is required under heat.

M2 Tool Steel’s combination of hardness, wear resistance, and thermal stability makes it an optimal choice for cutting, machining, and forming applications in high-speed environments.

Different Designations for M2 Tool Steel:

Standard	Designation
UNS	T11302
AISI/SAE	M2
DIN	1.3343
JIS	SKH51
ISO	HS6-5-2
BS	BM2
EN	HS6-5-2C

Fabrication and Heat Treatment of M2 Tool Steel:

Fabrication

Machining: M2 Tool Steel can be challenging to machine due to its high hardness and wear resistance. Machining is generally performed in the annealed (softened) state to reduce tool wear, with carbide-tipped tooling often recommended.
Grinding: M2 Tool Steel requires precision grinding for finishing, especially after hardening. This is necessary to achieve exact dimensions and surface finishes.
Welding: Due to its high carbon content, welding M2 is difficult and typically not recommended. If necessary, preheating and post-weld heat treatment are required to minimize cracking.

Heat Treatment

Annealing:
- Heat slowly to 850-900°C, hold for 1-2 hours, then cool in the furnace at a rate of 10°C per hour to about 600°C, followed by air cooling. This process will bring the steel to a maximum hardness of approximately 229 HB (Brinell Hardness).
Stress Relieving:
- To relieve machining-induced stress, M2 can be heated to 600-650°C, held for 1-2 hours, and then air-cooled. This process helps reduce the risk of warping during hardening.
Hardening:
- Preheat in stages to 450-500°C and then to 850-900°C. Afterward, rapidly heat to the final austenitizing temperature of 1,200-1,240°C. Once the material reaches uniform temperature, quench in oil, salt, or air for smaller sections. This yields maximum hardness.
Tempering:
- Temper immediately after hardening to achieve the desired hardness. M2 is commonly tempered at 540-600°C, depending on the required toughness and hardness balance. Multiple tempering cycles (2-3) are recommended for enhanced toughness and dimensional stability.

Key Considerations

Heat treatment processes like hardening and tempering are crucial in maximizing M2 Tool Steel’s hardness, wear resistance, and thermal stability, making it suitable for high-speed cutting and machining applications. Proper fabrication methods help maintain dimensional accuracy and prolong tool life.