H11 ESR Tool Steel
1.2343 ESR
- EN1.2343
- ENX37CrMoV5-1
- AISIH11
ESR-grade hot work tool steel combining excellent toughness with hot strength, resistance to thermal cycling and good thermal conductivity.
01Material Properties
- Very high toughness and ductility
- Good hot strength and temper resistance
- Clean and homogeneous microstructure
- Very good polishability
- Very good texturing capability
- Weldability
- Easy machining
- Hardenable up to 54 HRC by heat treatment
- Recommended working hardness 44–52 HRC
- Good nitriding response
- Suitable for coating
02Applications
- Dies and die inserts for all press forging applications
- High-volume plastic injection molds and applications requiring wear resistance above 48 HRC
- Aluminium extrusion dies and tooling: dies, backers, bolsters, rings, stems, dummy blocks
- Secondary areas of die casting dies
- Die casting dies for relatively low shot counts
- Low-pressure and gravity casting dies
- Industrial knives
03Delivery Condition
- 240 HB, soft annealed
04Heat Treatment
Typical values
- Soft annealing
- 750–800 °C, slow furnace cooling; max. 229 HB
- Stress relieving
- 600–650 °C
- Preheating
- Stepwise: 600–650 °C and 850 °C
- Hardening
- 1000–1030 °C; 20–30 min
- Quenching medium
- Pressurised gas in vacuum, oil, or 500–550 °C salt bath + air
- As-quenched hardness
- ≈ 52–54 HRC
- Tempering
- At least twice, min. 2 h; 550–650 °C
- Working hardness
- 42–52 HRC
- Nitriding
- 500–550 °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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