Steel HTR
HTR steel
Thermal shock resistance, high thermal conductivity and high-temperature strength
What?
HTR is a hot work tool steel with very good thermal shock resistance, high thermal conductivity and high-temperature strength. HTR is manufactured exclusively according to the ESU process.
Material properties
- Thermal shock resistance.
- Thermal conductivity.
- High temperature strength.
Application
Areas of use with high thermal loads:
- Pressure die-casting (max. 42 HRC).
- Gravity die-casting.
- Extrusion presses.
- Hot/ warm forming.
- Inner liners in heavy-metal extrusion presses.
Delivery condition
Annealed max. 230 HB.
Physical properties
| Temperature in °C | 20-100 | 20-400 | 20-600 |
|---|---|---|---|
| Thermal expansion in 10-6m/m x K | 12.3 | 13.6 | 13.8 |
| Temperature in °C | 20 | 200 | 400 |
| Thermal conductivity in W/m x K | 35.2 | 34.6 | 33.0 |
| Temperature in °C | 20 | ||
| Density in g/cm3 | 8.0 |
Heat treatment
| Soft annealing | Temperature: 820 – 840 °C, 4 – 6 hrs. |
|---|---|
| Cooling: soft furnace cooling | |
| Hardness: max. 220 HB | |
| Hardening | Temperature: 1015 – 1025°C |
| Cooling Oil, polymer, vacuum hardening with nitrogen quenching | |
| Tempering | Temperature: 540 – 680 °C |
| Hardness: see tempering graph | |
| Nitriding | Possible |
Graphs
Continue time-temperature-transformation
Tempering
High-temperature strength
