O1 | 1.2510
O1 (1.2510 / 100MnCrW4) is an oil-hardening cold work tool steel offering good wear resistance, high hardness, and excellent dimensional stability during heat treatment. It provides a good balance of toughness and machinability, making it suitable for cutting, punching, stamping, and precision tooling applications.
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
| W-Nr | EN | AISI | JIS |
| 1.251 | 100MnCrW4 | O2 | SKS93 |
Chemical Composition(wt%)
| C | Si | Mn | Cr | W | V |
| 0.85~0.95 | 0.20~0.40 | 1.00~1.30 | 0.40~0.60 | 0.40~0.60 | 0.2 |
Physical Properties
Density：7.85 g/cm³
Modulus of Elasticity: 210 GPa
Thermal Conductivity: 30.0 W/(m.K)
| Temperature | 20-100°C | 2-200°C | 2-300°C | 2-400°C |
| Coefficient of Thermal Expansion (×10-6 /K) | 12.1 | 12.9 | 13.3 | 14.0 |
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 760-790°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 150~260°C, hardness 62~57HRC
Application Fields
Applications include short run tooling for blanking dies, cold forming dies and cutting tools operating at ambient temperature. For working tools, cutting blades, sizing and stamping tools.
Disclaimer: the information and data presented herein are typical values for reference and are not intended as warranties to readers.
REQUEST A QUOTE
Related Products
