1.2436 (X 210 CrW 12)

AISI D6

Cold working steel for the manufacture of cutting, bending, press and embossing tools, punches, folding bars and knives.

1.2436 is a ledeburitic 12% chrome steel yet can be hardened by simple means. Machinability is generally unproblematic.

Tempering diagram
Hardness diagram: 950°C
Sample cross section: rect. 20 mm

Heat treatment diagram

TTT diagram for continuous cool down

Austenitisation temperature: 980 °C
Dwell time: 30 minutes

Hardness in HV
3...100 Microstructure components in %
0.9...20.0 Cool down parameters, i.e. cooling duration from 800°C to
500°C in seconds x 10 (power -2)
2 K/min...Cooling speed in K/min in the 800°C
to 500°C range
Mk...Martensite grain boundary
B...Bainite

Microstructure mass diagram
Lk... Ledeburitic carbide
B... Bainite

—— Water cooling
------- Oil cooling
– • – Air cooling
1... Work piece edge
2... Work piece centre
3... Jominy sample: distance from front face

Austenitisation temperature: 980°C
Dwell time: 30 minutes

Dependence of grain hardness and hardening depth on the work piece diameter
Hardening temperature: 950°C
Hardening medium:
_____ Oil
------- Air

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