D2/D2V.80/1.2379

Threading rolls and dies, cold extrusion tools, trimming, cutting and stamping tools for sheet thicknesses up to 6 mm, precision cutting tools for sheet thicknesses up to 12 mm, cold pilger mandrels, circular-shear blades, deep-drawing tools, pressure pads and highly wear-resistant plastic moulds.

12 % ledeburitic chromium steel. Combines maximum wear resistance, good toughness, outstanding cutting edge retention and tempering resistance. It can be nitrided after special heat treatment.

DIN W.Nr AISI/ASIM X155CrVMo12-1 1.2379 D-2

C Si Mn P(Max) S(Max) Cr Mo V 1.40-1.60 0.10-0.60 0.10-0.60 0.03 0.03 11.0-13.0 0.70-1.20 0.70-1.00

20°C 100°C 250°C 500°C Coefficient of thermal expansion at °C 10-6 m/(W/mk) 10.5 11.5 11.9 12.2 Thermal conductivity at °C (W/mk) 16.7 20.5 24.2

TREATMENT TEMPERATURE HOLDING TIME (HT) COOLING COMMENTS Annealing Heat to 830 – 860 °C Min. H.T. for 2 minute /mm Furnace - Stress relieving Heat to 650 – 700 °C Min. H.T. for 2 minute /mm Furnace - Hardening Heat to 1000 – 1050 °C Min. H.T. for 1 minute /mm Air, oil or saltbath, 500 – 550 °C - Note Hardening temperature 1050-1080 °C, tempered 3 times °C 100 200 300 400 500 525 550 600 HRC 63 61 58 58 58 60 56 50

Hardening temperature: 1030 °C

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