1.2311 P 20

1.2311 (40 CrMnMo 7)

AISI P 20

Chemical composition % C Si Mn P S Cr Mo Ni Cu
0.38 0.40 1.43 0.012 0.071 1.82 0.17 0.16 0.11

Plastic mould steel for medium and large moulds. Because this material is supplied pre-tempered to 950 - 1,150 N/mm², it is likewise suitable for general machine building components. By comparison, 1.2312 is easier to machine due to the sulphur content but does not polish. 1.2311 can be polished and photo-etched. Both materials can be gas and bath nitrided.


Tempering diagram
1.2311-12-1a
  • Hardness temperature: 850°C
  • Sample cross section: rect. 50 mm
Surface treatment
1.2311-12-1b
  • Nitriding:
  • Hardening development in the nitrided case
  • —— Gas nitriding in amonia stream: 50 hours at 520°C
  • ––– Bath nitriding (Tenifer process) 2 hours at 570°C

TTT diagram for continuous cool down
1.2312-1c
  • Austenitisation temperature: 840°C
  • Dwell time: 15 minutes
Microstructure mass diagram
1.2312-1d
  • —— Water cooling
  • ------- Oil cooling
  • – • – Air cooling
  • 1...Work piece edge
  • 2...Work piece centre
  • 3...Jominy sample: distance from the front face
Material info

Obtainable as the following products:

Downloads

1.2311 P 20

Plastic mould steel for medium-sized and large moulds

Attention please!

Some features of our webshop are not supported by your current browser version.
We recommend updating your browser or using a different browser.