Steel 1.2767 - N400
1.2767 - N400 steel:
high hardenability and good polishability
What?
1.2767 – N400 steel is characterised by its high Ni content as a tough cold-work tool steel with high hardenability. As well as good polishability and texturing properties, N400 tends towards good through-hardenability.
Material properties
Properties of steel type 1.2767 – N400
- Good toughness.
- High hardenability.
- Good polishability.
- Good through-hardenability.
Application
The most common applications for steel type 1.2767 – N400
- Cutlery stamping dies, shear blades for thick but goods above 12 mm thick.
- Scrap and billet shear blades.
- Embossing and bending tools for heavy cold forming.
- Puller jaws, large lathe punches and similar tools, which demand maximum toughness.
- Shrink rings, tempered as required to a strength of 1300-1600 MPa.
- Plastic moulds.
Physical properties of 1.2767 - N400 steel
| Temperature in °C | 20-100 | 20-400 | 20-600 |
|---|---|---|---|
| Thermal expansion in 10-6m/m x K | 12.3 | 13.1 | 13.7 |
| Temperature in °C | 20 | ||
| Thermal conductivity in W/m x K | 31.0 | ||
| Temperature in °C | 20 | ||
| Density in g/cm3 | 7.82 | ||
| Temperature in °C | 20 | ||
| E module in GPa | 210 |
Heat treatment
| Soft annealing | Temperature: 610 – 650 °C |
|---|---|
| Cooling Slow furnace cooling, 720 °C 6 – 8 hrs,. and slow furnace cooling, annealing 620 – 640 °C 10 – 12 hrs, and slow furnace cooling | |
| Hardness: max. 260 HB | |
| Hardening | Temperature: 840 – 870 °C |
| Cooling Air, warm bath from 180 – 220 °C or oil, interrupt oil cooling at approx. 150 °C | |
| Tempering | Temperature: 100 – 400 °C |
| Hardness: see tempering curve |
Graphs and datasheets of 1.2767 - N400
Continue time-temperature-transformation
Tempering
