M35
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Product Description:
M35 is a high-speed tool steel that is an upgraded version of the M2 tool steel, with the addition of 5% cobalt. This gives M35 superior hardness, wear resistance, and strength, particularly at high temperatures. It is primarily used in cutting tools, drills, taps, and other tools that need to perform at high speeds and resist wear. M35 is often selected for applications that involve high-performance machining, such as high-speed cutting, drilling, and milling, where tools are exposed to high thermal and mechanical stresses. The addition of cobalt significantly enhances the heat resistance and cutting ability of the steel.
Features:
- High Hardness: M35 offers superior hardness (up to 67 HRC) after heat treatment, which is essential for cutting tools and high-speed machining.
- Enhanced Wear Resistance: Due to the cobalt addition, M35 has improved wear resistance compared to M2, which makes it suitable for tough, abrasive cutting applications.
- Superior High-Temperature Strength: M35 maintains its hardness and strength even at high temperatures (up to 1100°F or 593°C), which is vital for high-speed cutting tools.
- Improved Toughness: While maintaining high hardness, M35 also offers better toughness than M2, reducing the likelihood of tool failure under stress.
- Excellent Cutting Performance: The cobalt content provides better edge retention and resistance to heat build-up, which enhances cutting efficiency and tool life.
- Good Grindability: Despite its high hardness, M35 can be ground with ease, allowing for the precision needed in tool-making.
Specifications:
- ASTM A600: Standard Specification for High-Speed Tool Steel, including M35.
- SAE J438: Standard for high-speed tool steels, including M35.
- UNS T31535: Unified Numbering System designation for M35 tool steel.
Composition of M35 Tool Steel:
Element | Percentage |
---|---|
Carbon (C) | 0.90 – 1.05 |
Chromium (Cr) | 3.75 – 4.50 |
Molybdenum (Mo) | 5.00 – 6.00 |
Vanadium (V) | 1.75 – 2.20 |
Cobalt (Co) | 4.75 – 5.50 |
Manganese (Mn) | 0.30 – 0.60 |
Silicon (Si) | 0.20 – 0.40 |
Phosphorus (P) | 0.03% max |
Sulfur (S) | 0.03% max |
Iron (Fe) | Balance |
Physical Properties:
Property | Value |
---|---|
Density | 8.10 g/cm³ |
Melting Point | 1375-1450°C (2507-2642°F) |
Hardness (Rockwell C) | 62-67 HRC |
Tensile Strength (Ultimate) | 290,000 psi (2000 MPa) |
Yield Strength | 260,000 psi (1790 MPa) |
Elongation | 10-15% |
Modulus of Elasticity | 210 GPa |