Steel 2.4668 - SA718

2.4668 - SA718 steel
Very high thermal loads

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.

Properties of steel type 2.4668 – SA718
 
  • High temperresistance.
  • Very high thermal loads.
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.

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 °C20-10020-20020-40020-600
Thermal expansion in 10-6m/m x K13.014.014.515.2
Temperature in °C20200400600
Thermal conductivity in W/m x K13.314.217.220.5
Temperature in °C20
Density in g/cm38,2
Temperature in °C20
E module in GPa205

Heat treatment

Soft annealingTemperature: 980 °C, 1 hour
Cooling: air
TemperingTemperature: 720 °C, 8 hrs

Graphs

2.4668 SA718 steel

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