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1.2343 / 1.2343 ESU Hot-work steel

Designation

DIN:	X 37 CrMoV 5-1
AFNOR:	Z 38 CDV 5
UNI:	X 37 CrMoV 5-1 KU
AISI:	H11 / H11 ESR

Indicatory analysis:

C	0.38
Si	1.00
Mn	0.40
Cr	5.30
Mo	1.20
V	0.40

Strength:

max. 230 HB
(≈ max. 780 N/mm²)

Thermal conductivity at 200 °C:

27 W/m K

Character:

high-alloy hot-work steel with high toughness and heat resistance, hot cracks resistance and good thermal conductivity; for very high requirements available in grade *ESR (Electro-Slag Remelted)

Application:

moulding plates and inserts for plastic injection mould tools; *ESR for applications for die casting (Al, Mg, Zn)

Treatment by

highly suitable:
Polishing

very easily feasible (graining):
Etching
EDM:
in the hardened and tempered condition, treat again for stress relief about 20 °C below the last tempering temperature
Nitriding:
increases the wear resistance and prevents the bonding of casting material
Hard chroming:
in special cases

Heat treatment:

Annealing:
750 to 800 °C, about 4 to 5 hours slow controlled cooling of 10 to 20 °C per hour to about 600 °C; further cooling in air, max. 205 HB

Hardening:
1000 to 1040 °C
15 to 30 minutes keeping curing temperature
quenching in water/oil/air
obtainable hardness: 50−56 HRC

Nitriding:
Before nitriding stress-relief annealing is recommended at 550 °C. (Meusburger standard)
A treatment at 525 °C in ammonia gas results in a surface hardness of approx. 55 HRC

Tempering:
slow heating to tempering temperature immediately after hardening; minimum time in furnace: 1 hour per 20 mm part thickness; repeated tempering is recommended

Tempering chart:

High temperature strength chart:

TechnicalTip:

susceptible to corrosion; during maching, continuous corrosion protection has to be ensured (especially during wire EDM)
1.2343 ESR is highly suitable for mirror polishing

To the mould making overview To the die making overview