L6
Description
1.2714 Tool Steel is a versatile, oil-hardening tool steel that is characterized by very good toughness. This grade is suitable for use as tools, dies, and machine parts, which require a good combination of hardness and toughness. The relatively high nickel content results in an alloy with greater impact toughness compared to the other common oil-hardening grades. Tough die steel with high tempering resistance and good through-hardening properties. This grade is usually supplied in annealed condition or quenched and tempered to a working hardness of 370 to 410 HB (round) or 355 to 400 HB.
Chemical Composition
C | MN | SI | CR | NI | V |
---|---|---|---|---|---|
0.7 | 0.65 | 0.3 | 0.8 | 1.6 | 0.15 |
Standards
DB6 | L6 | 1.2714 | W500 | AFNOR 55NCDVV7 | 55NiCrMoV |
Properties
Coefficient of thermal expansionat °C | 20-100 | 20-200 | 20-300 | 20-400 | 20-500 | 20-600 |
---|---|---|---|---|---|---|
10-6 m/(m*K) | 12.1 | 13.1 | 13.2 | 13.5 | 14.1 | 14.3 |
Thermal Conductivity °C | 20 | 350 | 700 | |||
W/(m*K) | 35 | 39 | 36 |
Applications
- Press Dies
- Extrusion Dies
- Retainer Plates
- Armoured Trim Dies
- Hot-shear Blades
- Tool Holders
- Cold Forming Tools
Soft annealing °C | Cooling | Hardness HB |
---|---|---|
650-710 | Furnace | max. 240 |
840-880 | Oil | 57 |
860-900 | Air | 55 |
Tempering °C after quenching | 100 | 200 | 300 | 400 | 450 | 500 | 550 | 600 | 650 |
---|---|---|---|---|---|---|---|---|---|
in Oil - HRC | 56 | 54 | 52 | 49 | 47 | 46 | 43 | 38 | 34 |
in Air - HRC | 54 | 52 | 50 | 47 | 45 | 43 | 40 | 36 | 32 |