1.2311
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
- Hardness temperature: 850°C
- Sample cross section: rect. 50 mm
Surface treatment
- 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
- Austenitisation temperature: 840°C
- Dwell time: 15 minutes
Microstructure mass diagram
- —— Water cooling
- ------- Oil cooling
- – • – Air cooling
- 1...Work piece edge
- 2...Work piece centre
- 3...Jominy sample: distance from the front face
Obtainable as the following products:
- PräziPlan PräziPlan Precision Ground Flat Stock
- Sonderabm. PräziPlan Special size
- VarioPlan VarioPlan
- Raw Material Raw Material
- Steel Glossary Steel Glossary
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