Steel HP1
HP1 steel:
high-temperature characteristics and maximum toughness
What?
HP1 steel is a Cr-Mo-V alloyed hot-work tool steel with very good high-temperature strength characteristics and maximum toughness. This steel is also characterised by good thermal shock resistance. HP1 is only manufactured in remelted version according to the ESU process.
Material properties
- High-temperature strength .
- Maximum toughness.
Application
HP1 is particularly suitable for the following applications with maximum mechanical and thermal loads:
- Pressure die casting.
- Extrusion presses: Dies with high toughness requirements.
- Inner liners.
- Hot forming.
Physical properties of HP1
| Temperature in °C | 20-100 | 20-400 | 20-600 |
|---|---|---|---|
| Thermal expansion in 10-6m/m x K | 11.5 | 12.6 | 13.1 |
| Temperature in °C | 20 | 200 | 400 |
| Thermal conductivity in W/m x K | 29.5 | 30.5 | 30.5 |
| Temperature in °C | 20 | ||
| Density in g/cm3 | 7.8 | ||
| Temperature in °C | 20 | ||
| E module in GPa | 214 |
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 Air, warm bath of approx. 540 °C, Oil/polymer; Interrupt oil or polymer cooling at 230 – 280 °C or vacuum hardening | |
| Tempering | Temperature: 540 – 680 °C |
| Hardness: see tempering graph | |
| Nitriding | If die-casting dies are to be nitrided, nitriding program 99 should be selected. This nitriding layer does not have a compound layer and therefore does not have a negative influence on the formation of thermal shock cracks. |
| Preheat before use | Temperature: 150 – 350 °C |
Graphs and datasheets of HP1
Continue time-temperature-transformation
Tempering
Hight-temperature strength
