1.2162 Steel for case-hardening

Designation

Chemical composition:

Strength:

max. 210 HB
(≈ max. 710 N/mm²)

Thermal conductivity at 100 °C:

38.5 W/m K

Character:

standard steel for case-hardening with good machinability; high surface hardness with tough core

Application:

machine parts and molding plates with a high surface hardness;
synthetic resin press molds for the processing of thermoplastics and thermosetting plastics.

Treatment by

possible:
Polishing, etching, EDM

Nitriding:
Usually, hardened parts are not nitrided → loss of hardness.

Hard chroming:
recommended, results in increased wear and corrosion resistance

Heat treatment:

Soft annealing:

670 to 710 °C for about 2 to 5 hours
slow controlled cooling, further cooling in air, max. 205 HB

Carburising:
900 to 950 °C. The choice of the carburising means and carburising temperature depends on the desired surface carbon content, the carburising graph and the required case depth.

Application:
870 to 930 °C in powder/salt bath, cooling in oil/warm bath at 160 to 250 °C

Intermediate stress-relieving heat treatment:
630 to 650 °C, about 2 to 4 hours with slow furnace cooling

Preheating:
350 °C depending on dimensions

Hardening:
curing temperature 810 to 840 °C in oil of ~ 60 °C warmth

Cooling:
down to about 100 °C in oil, then in air to about 50 °C

Tempering:
1 hour per 20 mm part thickness, at least 2 hours

Annealing graph:

Technical tip:

• For mirror polishing we recommend the steel for through hardening 1.2767.

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