Steel 1.2550 - KL
1.2550 - KL steel:
good toughness and cutting performance.
What?
1.2550 – KL steel is an oil-hardenable steel with very good toughness and relatively good cutting performance. The hardenability capacity is moderate for large cross-sections.
Material properties
Properties of steel type 1.2550 – KL
- Toughness.
- Good cutting performance.
- Hardenability capacity is moderate for large cross-sections.
Application
The most common applications for steel type 1.2550 – KL
- Cutting and punching tools for sheet metal thickness of approx. 6-12 mm.
- Cold punches.
- Deburring tools.
- Profile shear blades.
- Splicers.
- Woodworking tools.
- Small stamping tools.
- Ejectors and similar tools.
- Cutting tools for soft, medium-temperature cutting material (gently preheat tools).
Physical properties 1.2550 - KL steel
| Temperature in °C | 20-100 | 20-200 | 20-400 |
|---|---|---|---|
| Thermal expansion in 10-6m/m x K | 11.8 | 13.5 | 14.3 |
| Temperature in °C | 20 | ||
| Thermal conductivity in W/m x K | 31.9 | ||
| Temperature in °C | 20 | ||
| Density in g/cm3 | 7.85 | ||
| Temperature in °C | 20 | ||
| E module in GPa | 210 |
Heat treatment
| Soft annealing | Temperature: 750 – 780 °C, 4 – 6 hrs |
|---|---|
| Cooling: slow furnace cooling | |
| Hardness: max. 225 HB | |
| Hardening | Temperature: 870 – 900 °C |
| Cooling Interrupt oil cooling at approx. 150 °C | |
| Tempering | Temperature for hot work 550 – 600 °C |
| Hardness: see tempering curve |
Graphs and datasheets of 1.2550 - KL
Continue time-temperature-transformation
Tempering
