L6 Hot Work Tool Steel
1.2714
- EN1.2714
- EN55NiCrMoV7
- AISIL6
Shock-resistant hot work steel with refined microstructure, supplied fully machined on all faces.
01Material Properties
- Excellent toughness
- Uniform hardness through the core
- Suitable for surface treatments
- Available pre-hardened or soft annealed
- Good hot strength
- Use above 44 HRC is not recommended
02Applications
- Hammer forging dies
- Press forging dies
- Die holders for press forging
- Bolsters and backers in aluminium extrusion tooling
03Delivery Condition
- 230 HB, soft annealed
04Heat Treatment
Typical values
- Soft annealing
- 650–700 °C; max. 250 HB
- Stress relieving
- 550–600 °C
- Preheating
- 600–650 °C
- Hardening
- 840–870 °C; 20–30 min
- Quenching medium
- Oil or 180–220 °C salt bath; air for small sections
- As-quenched hardness
- ≈ 56–58 HRC
- Tempering
- Twice; 400–600 °C
- Working hardness
- 36–48 HRC; delivered pre-hardened 36–42 HRC
- Nitriding
- 500–530 °C
Heat treatment cycle (schematic)
Tempering diagram (approximate)
Values are approximate and for information only; they vary with section size, heat and furnace conditions. Binding values are determined from the manufacturer’s data under laboratory conditions.
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