1.3343 | M2 | SKH-51
1.3343 is a representative grade of tungsten‑molybdenum general‑purpose high‑speed steel. This steel features fine and uniform carbides, high toughness and excellent hot workability.
Available Form
Round Bar
Custom Diameter & Length
Flat Bar
Custom Thickness, Width & Length
Square Bar
Custom Width & Length
Steel Plate
Custom Thickness, Width & Length
Steel Grade Comparison(wt%)
| W-Nr | EN | AISI | JIS |
| 1.3343 | S2-9-1 | M2 | SKH-51 |
Chemical Composition
| C | Si | Mn | P | S | Cr | Mo | W | V |
| 0.86~0.94 | ≤0.45 | ≤0.40 | ≤0.030 | ≤0.030 | 3.80~4.50 | 4.70~5.20 | 5.90~6.70 | 1.70~2.10 |
Physical Properties
Density（g/cm3)：8.0
Modulus of Elasticity（Gpa): 217
Thermal Conductivity（W/（m.k)): 19.0
| Temperature/℃ | 20-100 | 2-200 | 2-300 | 2-400 |
| Coefficient of Thermal Expansion（×10-6） | 11 | 11.5 | 11.9 | 12.3 |
Heat Treatment Process
Hardening: Heat the steel evenly to 450~650°C until the whole section reaches temperature. Then quench in oil to cool.
Annealing: Heat the steel to 790~820°C, hold it well at temperature, and then let it cool slowly inside the furnace.
Tempering: Heat the steel uniformly, hold it at the selected tempering temperature, and then allow it to cool in still air.Tempering temperature: 540~560°C, HRC: 63 for box furnace, 64 for salt bath furnace.
Application Fields
For manufacturing heavy-load, complex-shaped and high-value cutting tools, such as scrapers, gear cutters, milling cutters, drills, taps, etc. Also used for cold forging dies, forging tools, slitting machines and heading forming dies.
Disclaimer: the information and data presented herein are typical values for reference and are not intended as warranties to readers.
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