D2 Tool Steel

D2 tool steel – a high carbon, high chromium cold work steel, it is used when greater toughness is required. D2 offers high compressive strength and good wear resistance.

Typical D2 applications: General and heavy duty press tools, general purpose dies and punches, swaging dies, blanking tools, gauges, tools that require resistance to abrasion, thread rolling and coining.

Data sheet & typical analysis can be supplied on request call 01902 716345

We cut our D2 tool steel flats and squares from plate and we can supply stock to any dimensions you require. Our D2 tool steel is available in economiser or black.

D2 Supreme™: Where higher hardness (62-63 HRC) and superior toughness and wear resistance is required, consider our DC53 Equivalent Steel, D2 Supreme™.

Call 01902 712 360 for nationwide tool steel delivery.


 

D2 Steel Properties

D2 steel is an air hardening, high-carbon, high-chromium tool steel. It has high wear and abrasion resistant properties. It is heat treatable and will offer a hardness in the range 55-62 HRC, and is machinable in the annealed condition. D2 steel shows little distortion on correct hardening. D2 steel’s high chromium content gives it mild corrosion resisting properties in the hardened condition.

Typical chemical composition of AISI D2 Steel

C

SI

Cr

Mo

V

1.50% 0.30% 12.00% 0.80% 0.90%

Forging:

Heat slowly and uniformly to 700°C then more rapidly to 900/1040°C. Do not continue to forge D2 below 925°C. Reheat as often as necessary to maintain proper forging temperature. After forging cool slowly. This is not an annealing process. After the forging is cold, it must be annealed as described below.

Annealing:

Heat uniformly to 843/871°C, then slow furnace cool at a rate of not more than 10°C per hour. After annealing D2 a maximum hardness of 240 Brinell may be achieved

Hardening:

D2 tool steel is extremely sensitive to overheating during hardening – do not overheat.

Pre heat slowly to 750/780°C and soak. Continue heating to the final hardening temperature of 1000/1030°C and allow the component to equalise. Quench in oil or cool in air.

Tempering:

Heat uniformly and thoroughly to the desired temperature and hold for 25 minutes per cm of thickness. D2 can be double tempering at approximately 15°C below the first tempering, after intermediate cooling to room temperature.

Tempering D2 Steel

Tempering °C

150

200

250

300

350

400

HRC

62/61

61/60

60/59

57/56

56/55

56/55