Basic Specification:
Standard / Designation:
Numerical designation: 1.2343
Designation: X37CrMoV5-1
Grade: Hot-work tool steel
Chemical composition (typical values):
C: 0.36 – 0.42 %
Si: 0.80 – 1.20 %
Mn: 0.25 – 0.50 %
Cr: 4.80 – 5.50 %
Mo: 1.10 – 1.40 %
V: 0.30 – 0.50 %
P, S: max. 0.03 %
Properties:
High resistance to thermal fatigue and hot cracking.
Good toughness and wear resistance.
Stable microstructure at elevated temperatures.
Good machinability in the annealed condition.
Hardness after hardening and tempering: approx. 48–52 HRC.
Heat treatment:
Soft annealing: 750 – 800 °C, slow cooling; hardness max. ~230 HB.
Hardening: Heating to 1000 – 1050 °C, cooling in oil or in air.
Tempering: 550 – 670 °C (depending on required hardness); double or triple tempering recommended.
Applications:
Dies and molds for pressure casting of aluminum, zinc, and magnesium.
Tools for hot forming operations.
Cutting and shearing tools exposed to high temperatures.
Highly stressed tool parts requiring thermal fatigue resistance.
