Abbreviated DIN name:
Chemical analysis (%):
HASCO colour code:
Hardness when supplied:
annealed to max. 210 HB
Material properties: Standard steel with good machinability.
After suitable heat treatment, high surface hardness with good
wear resistance and tough core.
Uses: Cavity plates and inserts for plastics processing. Frame
plates for compression moulds and injection moulding tools
subjected to high stresses. Tool components subjected to high
wear because of the particular function. Other components in
which surface hardness and core strength are specified.
Thermal expansion coefficient (10-6·m) / (m·K)
Thermal conductivity W / (m·K)
||Technical polishing is possible.
||Not usual because the hardness declines considerably. Hardened workpieces from these steel types are not nitrided.
||810°C – 840°C
Details can be taken from the time-temperature conversion and tempering charts. The most suitable heat treatment for the relevant workpiece should be fixed by the hardening shop. The hardness should be specified by the hardening shop and checked on delivery.
||690°C, approx. 4 h
|To eliminate residual stress after coarse machining at
approx. 600°C – 650°C, approx. 4 h with slow heating and furnace cooling.
|Surface hardness 58 - 61 HRC, core strength 1000 - 1200 N/mm2
Time-temperature conversion chart Tempering chart