P.20 1.2311

1.2311 is a standard mold steel pre-hardened to 300HB.


Material properties

Standard prehardened steel designed for plastic mold industry.


For which tools

Plastic injection mould cores and cavities, extension dies for thermoplastics.


For which plastics

Thermoplastics (PE, PP, PS), thermosetting plastics, transparent melts.



• EN: 40 CrMnMo7
• WERKSTOFF Number: 1.2311
• AISI: ≈ P20


Chemical analysis


Typical values (weight%)

C   S max    P max    Si   Mn   Cr   Mo
.4    .005      .012    .3    1.5   1.9   .2


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