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Lowering tension

In our selected range you can find the right material for virtually any application.

Franz Kohler
Head of Product Division

1.2312 Tool steel

Designation

DIN:40 CrMnMoS 86 
AFNOR:40 CMD 8.S
UNI:-
AISI:P20 + S
 

Chemical composition:

C0.40
Si0.40
Mn1.50
Cr1.90
Mo0.20
S0.06

Strength:

≈ 1080 N/mm²

Thermal conductivity at 100 °C:

35 W/m K


Character:

alloyed and pre-toughened tool steel, with excellent machinability in the hardened condition because of the Sulphur additive; high dimensional stability

Application:

plates for mould bases and die sets with increased requirements on strength; high-tensile machine parts


Treatment by

not recommended:
Etching, EDM

Polishing:
technical polishing possible; for higher surface requirements we recommend 1.2311 or 1.2738

Nitriding:
increases the steel's wear resistance

 


Heat treatment:

already pre-toughened; usually no heat treatment required

Nitriding:
Before nitriding, stress-relief annealing at 580 °C is recommended (Meusburger standard).

Hardening:
840 to 860 °C

Cooling:
down to 180 °C/220 °C in oil/hot bath
obtainable hardness: 52 HRC

Tempering:
slow heating to tempering temperature immediately after hardening; then maintain the temperature in the furnace for at least 1 hour per 25 mm part thickness


Technical tip:
  • for increased surface quality requirements use material grade 1.2311

Available in the web shop as:
Data sheet 1.2312

Open PDF

Material grades brochure

Material grades brochure

Material grades poster

Material grades poster

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