L6 | 1.2714 | SKT4
L6 (UNS T61206) is a nickel-chromium-molybdenum alloy tool steel offering excellent toughness, good hardenability, and high impact resistance. Its balanced combination of hardness and toughness makes it suitable for demanding tooling applications involving heavy loads and repeated impact.
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 |
| 1.2714 | 55NiCrMoV7 | L6 | SKT4 |
Chemical Composition(wt%)
| C | Si | Mn | P≤ | S≤ | Cr | Mo | V | Ni |
| 0.50~0.60 | 0.10~0.40 | 0.60~0.90 | 0.03 | 0.03 | 0.80~1.20 | 0.35~0.55 | 0.05~0.15 | 1.50~1.80 |
Physical Properties
Density：7.86 g/cm³
Modulus of Elasticity: 207 GPa
Thermal Expansion (20–100°C)：11.3 (×10-6 /K)
Heat Treatment Process
Hardening: Heat the steel evenly to 790-840°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 150~540°C, hardness 62~45HRC
Application Fields
Cold forming dies, punches, and forming tools.,blanking dies, trimming dies, and embossing dies, spindles, rollers, and machine components, coining dies, chuck parts, and impact-resistant tools, shear blades and forming rolls.
Disclaimer: the information and data presented herein are typical values for reference and are not intended as warranties to readers.
