DIN 1.2344 Hot work steel
- Description
Description
DASIGNATION| DIN: | X 40 | CrMoV 5-1 |
|---|---|---|
| AFNOR: | Z 40 | CDV 5 |
| UNI: | X 40 | CrMoV 5-1 KU |
| AISI | H13 | H13 ESR |
CHEMICAL COMPOSITION
| C | 0.40 |
|---|---|
| V | 1.00 |
| Si | 1.00 |
| Mo | 1.40 |
| Cr | 5.30 |
STRENGTH:
max. 230 HB
(≈ max. 780 N/mm²)
Thermal conductivity at 100 °C:
26 W/m K
CHARACTER:
high-alloy hot-work steel, high heat resistance, high wear resistance, good toughness, thermal conductivity and hot cracks resistance, limited use for water cooling; for very high requirements available in grade *ESR (Electro-Slag Remelted)
APPLICATION:
standard material for hot-work tools, extrusion molds, dies, tools for plastic processing
TREATMENT BY:
Polishing, etching, EDM, nitriding » is possible
Hard chroming » in special cases
HEAT TREATMENT:
Tempering:
slow heating to tempering temperature immediately after hardening; minimum time in furnace: 1 hour per 20 mm part thickness
Hardening:
1020 to 1060 °C
15 to 30 minutes keeping curing temperature
quenching in water/oil
obtainable hardness: 54 HRC
Soft annealing:
750 to 800 °C for about 4 to 5 hours; slow controlled cooling of 10 to 20 °C per hour to about 600 °C;further cooling in air, max. 230 HB
TECHNICAL TIP:
- susceptible to corrosion; during machining, continuous corrosion protection has to be ensured (especially during wire EDM)
- 1.2344 ESRH is very suitable for mirror polishing
