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DIN 2379 Cold Work Tool Steel

CHEMICAL COMPOSITION (Typical Analysis in %)

C Si Mn P S Cr Mo V
1.40-1.60 0.10-0.60 0.20-0.60 0.030max 0.030max 11.00-13.00 0.70-1.00 0.80-1.20

C45 Steel bar is a high quality Quenched and Tempered Carbon Structural steel, It belong to the high quality low carbon machinery structural steel DIN C45 steel Annealing delivery hardness less than 250HB.C45 With a mild carbon content range.

Steel Properties

  • High Carbon High Chromium contents.
  • High wear resistant and toughness due to Vanadium addition of 0.90%.
  • Supply condition is an Annealed which offer hardness to reach 57-59 HRC.
  • Machinable in annealed condition.
  • Better than D3 steel due to high alloy properties.

Physical Properties

Coefficient of thermal expansionat °C 20-100 20-200 20-300 20-400
10-6 m/(m*K) 10.6 11.5 11.8 12.3

Thermal Conductivity at °C 20 350 700
W/(m*K) 16.7 20.5 24.2


HCHCR D2 tool steel applicable for cold stamping or forming dies, cold forming rolls, Chipper knives, Punches, slitters, shear blades, tools, tyre shredders, trimming, cutting Threading Dies , stamping tools Etc.

Heat Treatment

Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of alloy steel.

Soft annealing °C Cooling Hardness HB
840 – 870 Furnace max. 250

Stress-relief annealing °C approx. 660-710
Cooling Furnace

Hardening °C Quenching Hardness after quenching HRC
1000-1050 Air, oil or saltbath, 500-550 °C 63
Tempering °C after quenching 100 200 300 400 500 525 550 600
HRC 64 61.5 58.5 58.5 59 60 57 50