1.3247 | M42 | SKH-59
1.3247 is a high-cobalt tough high-speed tool steel. It features high hardness, good hot hardness, excellent wear resistance and superior grindability.
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 |
| 1.3247 | S2-10-1-8 | M42 | SKH-59 |
Chemical Composition
| C | Si | Mn | P | S | Cr | Mo | W | V | Co |
| 1.05~1.12 | ≤0.70 | ≤0.40 | ≤0.030 | ≤0.030 | 3.50~4.50 | 9.00~10.00 | 1.20~1.90 | 0.90~1.30 | 7.50~8.50 |
Physical Properties
Density（g/cm3)： 8.01
Modulus of Elasticity（Gpa): 210
Thermal Conductivity（W/（m.k)): 19.0
| Temperature/℃ | 20-100 | 2-200 | 2-300 | 2-400 |
| Coefficient of Thermal Expansion（×10-6） | 9.8 | 10.8 | 11.1 | 11.6 |
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 770~820°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: 510~540°C, hardness ≥66 HRC
Application Fields
Commonly used for machining superalloys and dissimilar alloys, suitable for drills, hobs, taps, end mills, milling cutters, forming tools, gear cutters, broaches and slotting tools.
Disclaimer: the information and data presented herein are typical values for reference and are not intended as warranties to readers.
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