M2
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Product Description:
M2 is a high-speed tool steel that is widely used in the manufacturing of cutting tools, such as drills, taps, and milling cutters. Known for its excellent wear resistance, high hardness, and ability to retain its strength at elevated temperatures, M2 is one of the most popular tool steels in the high-speed tool steel family. It is an alloy of tungsten, molybdenum, chromium, and vanadium, which gives it its outstanding wear resistance and toughness. M2 is commonly used in applications requiring tools that must maintain sharpness and durability at high speeds and temperatures.
Features:
- High Hardness: M2 tool steel can achieve very high hardness (up to 65 HRC), making it ideal for cutting tools that need to stay sharp and wear-resistant.
- Good Wear Resistance: Excellent resistance to wear, especially in cutting and drilling operations that involve high-speed usage.
- High-Temperature Strength: M2 can withstand elevated temperatures (up to 600°C or 1112°F) without losing its hardness, which is essential for high-speed machining.
- Toughness: Offers good toughness and resistance to cracking under stress, maintaining performance in tough working conditions.
- Excellent Edge Retention: Due to its hardness and wear resistance, M2 maintains a sharp cutting edge longer than many other tool steels.
- Good Grindability: It is easier to grind compared to some other high-speed steels, making it suitable for precision tooling.
Specifications:
- ASTM A600: Standard Specification for High-Speed Tool Steel, which includes M2.
- SAE J438: Standard for high-speed tool steels, including M2.
- UNS T11302: Unified Numbering System designation for M2 tool steel.
Composition of M2 Tool Steel:
Element | Percentage |
---|---|
Carbon (C) | 0.85 – 1.05 |
Chromium (Cr) | 3.75 – 4.50 |
Molybdenum (Mo) | 5.00 – 5.50 |
Vanadium (V) | 1.75 – 2.20 |
Manganese (Mn) | 0.25 – 0.45 |
Silicon (Si) | 0.20 – 0.40 |
Phosphorus (P) | 0.03% max |
Sulfur (S) | 0.03% max |
Iron (Fe) | Balance |
Physical Properties:
Property | Value |
---|---|
Density | 8.03 g/cm³ |
Melting Point | 1375-1425°C (2507-2597°F) |
Hardness (Rockwell C) | 62-65 HRC |
Tensile Strength (Ultimate) | 290,000 psi (2000 MPa) |
Yield Strength | 250,000 psi (1720 MPa) |
Elongation | 10-15% |
Modulus of Elasticity | 210 GPa |