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Franz Kohler
Responsabile ufficio Prodotti

1.2083 / 1.2083 ESU Steel for through hardening

Designation

DIN:X 40 Cr 14
AFNOR:Z 40 C 14
UNI:-
AISI:420 / 420 ESR
 

Chemical composition:

C0.40
Si0.40
Mn0.30
Cr13.00
 

Strength:

≈ 720 N/mm²

Thermal conductivity at 100 °C:

18 W/m K


Character:

low corrosion, high-alloy, low warpage steel for through hardening with excellent properties for mirror polishing as well as good photoetching, good machinability, high wear resistance and high dimensional stability

Application:

mould plates and inserts for working with chemically aggressive plastics; because of excellent polishing, suitable for optical and medical products


Treatment by

Polishing:
can be polished in the annealed and hardened state; good preliminary surface preparation work is decisive for a good polish

Etching:
good photoetching (graining)

EDM:
in the hardened and tempered condition, treat again for stress relief about 20°C below the last temperature
unusual:

Nitriding, hard chroming

 


Heat treatment:

Soft annealing:
750 to 800°C for about 2 to 5 hours
slow controlled cooling of 10 to 20°C per hour to about 650°C; further cooling in air, max. 200 HB


Hardening:

1000°C to 1050°C
15 to 30 minutes keeping curing temperature
quenching in oil/compressed gas/hot bath
obtainable hardness: 53 - 56 HRC


Tempering:

slow heating to tempering temperature immediately after hardening;
minimum time in furnace: 2 hours per 20 mm part thickness;
Tempering twice is recommended.

Annealing graph:



Technical tip
  • Cold-work steel
  • must be tempered several times after hardening (max. 52HRC). The demand for “max. hardness” often ends up in material breakage.
  • mould temperature max. 200°C
  • corrosion-resistant after hardening
  • The ESR quality guarantees an extremely pure and homogeneous microstructure.

1.2083 Available in the web shop as:
1.2083 ESR Available in the web shop as:
Data sheet 1.2083 / 1.2083 ESR

Apri il PDF

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