1.2842 | O2 | SKS93
O2 mold steel is a low-alloy cold-work tool steel. The presence of a certain amount of vanadium in the steel helps refine the grain structure and reduces its sensitivity to overheating, while also providing high hardness and wear resistance.
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 |
| 1.2842 | 90MnCrV8 | O2 | SKS93 |
Chemical Composition
| C | Si | Mn | P | S | Cr | V |
| 0.85~0.95 | 0.10~0.40 | 1.80~2.20 | ≤0.030 | ≤0.030 | 0.20~0.50 | 0.05~0.60 |
Physical Properties
Density（g/cm3)：7.85
Modulus of Elasticity（Gpa): 210
Thermal Conductivity（W/（m.k)): 30.0
| Temperature/℃ | 20-100 | 2-200 | 2-300 | 2-400 |
| Coefficient of Thermal Expansion（×10-6） | 12.1 | 13.3 | 13.8 | 14.3 |
Heat Treatment Process
Hardening: Heat the steel evenly to 790~820°C until the whole section reaches temperature. Then quench in oil to cool.
Annealing: Heat the steel to 680~720°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℃ | 100 | 200 | 300 | 400 |
| Hardness (HRC) | 63 | 60 | 56 | 50.0 |
Application Fields
Measuring tools; industrial knives for the timber, paper-making, and metal industries; cold-cutting shear blades; thread-cutting 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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