Steel 1.2744 - PWU
1.2744 - PWU steel:
high performance die steel
What?
1.2744 – PWU steel is a high performance die steel. As a result of the raised Mo content compared to PWM, there is better high-temperature wear resistance and best tempering.
Material properties
Properties of steel type 1.2744 – PWU
- High-temperature wear resistance.
- Best tempering.
Application
The most common applications for steel type 1.2744 – PWU are:
- Dies for all kinds of steel forming.
- Jaws in cutting machines.
- Tools in extrusion presses such as stamps, linings and shear blades.
- Compression dies for all light metals and their alloys.
- Tough shear blades for cold and hot work.
Physical properties of 1.2744 - PWU steel
| Temperature in °C | 20-100 | 20-200 | 20-400 | 20-600 |
|---|---|---|---|---|
| Thermal expansion in 10-6m/m x K | 11.6 | 11.9 | 12.7 | 13.3 |
| Temperature in °C | 20 | 200 | 400 | |
| Thermal conductivity in W/m x K | 36.0 | 37.0 | 35.0 | |
| Temperature in °C | 20 | |||
| E module in GPa | 215 |
Heat treatment
| Soft annealing | Temperature 740 – 760 °C, 6 – 8 hrs |
|---|---|
| Cooling Slow furnace cooling | |
| Hardness max. 250 HB | |
| Hardening | Temperature 850 – 880 °C in Oil/polymer, 870 – 900 °C blast air |
| Cooling Cooling must be interrupted at approx. 150 °C or vacuum hardening | |
| Tempering | Temperature 400 – 700 °C |
| Hardness see tempering curve | |
| Nitriding | possible under some conditions |
| Preheating before use | Temperature 150 – 350 °C essential |
Graphs and datasheets of 1.2744 - PWU
Continue time-temperature-transformation
Tempering
High-temperature strength
