Steel 2.4668 - SA718
2.4668 - SA718 steel
Very high thermal loads
What?
2.4668 – SA718 steel is an age-hardenable nickel-based alloy with very high high-temperature strength Particularly suitable as hot work material for very high thermal loads. If the temper resistance of the martensitic steels is no longer sufficient.
Material properties
Properties of steel type 2.4668 – SA718
- High temperresistance.
- Very high thermal loads.
Application
The most common applications for steel type 2.4668 – SA718
- Dies, mandrel tips, pressure dies for extrusion presses for copper alloys.
- Sinter press tools.
- Hot shear blades.
- Forging dies.
- Inner liners.
- Heavy metal extrusion presses with 1350-1450 MPa.
Delivery condition
Solution annealed and tempered with following properties:
0,2% yield strength Rp0,2 = approx. 1100 MPa
Tensile strength Rm= approx. 1300 MPa
Physical properties 2.4668 - SA718 steel
| Temperature in °C | 20-100 | 20-200 | 20-400 | 20-600 |
|---|---|---|---|---|
| Thermal expansion in 10-6m/m x K | 13.0 | 14.0 | 14.5 | 15.2 |
| Temperature in °C | 20 | 200 | 400 | 600 |
| Thermal conductivity in W/m x K | 13.3 | 14.2 | 17.2 | 20.5 |
| Temperature in °C | 20 | |||
| Density in g/cm3 | 8,2 | |||
| Temperature in °C | 20 | |||
| E module in GPa | 205 |
Heat treatment
| Soft annealing | Temperature: 980 °C, 1 hour |
|---|---|
| Cooling: air | |
| Tempering | Temperature: 720 °C, 8 hrs |
