Cold-work tool steels include the high-carbon, high-chromium steels or group D steels. These steels are designated as group D steels and consist of D2, D3, D4, D5, and D7 steels. These steels contain 1.5 to 2.35% of carbon and 12% of chromium. Except for type D3 steel, all the other group D steels include 1% Mo and are air hardened. Type D3 steel is oil-quenched; though small sections can be gas quenched after austenitization using a vacuum. As a result, tools made with type D3 steel tends to be brittle during hardening. Type D2 steel is the most commonly used steel among group D steels.

Applications of D2 | D2 Steel
D2 tool steels are used for long run tooling applications, where wear resistance is important, such as blanking or forming dies and thread rolling dies.

D2 | D2 Steel material properties datenblatt as below:

Chemical composition data of Metal D2 | D2 Cold work tool steel-DIN 1.2379 (UNS t30402)

Element Content (%)
C 1.40 – 1.60
Mn 0.10 – 0.60
Si 0.10– 0.60
Co 1.00
Cr 11.0 – 13.0
Mo 0.70 – 1.20
V 0.50 – 1.10
P 0.03 MAX
Ni 0.30
Cu 0.25
S 0.03MAX

 

Material equivalent of DIN X155CrMoV12-1 | 1.2379 tool steel

USA Germany China Japan France England Italy Poland Czechia Austria Sweden Spain
– DIN,WNr GB BS UNI PN CSN ONORM SS UNE
D2 X155CrMoC12-1 | 1.2379  Cr12Mo1V1 X160CrMoV12

Physical properties of D2 | 1.2379 Tool Steel


  • Properties Metric Imperial
    Density 7.7 x 1000 kg/m3 0.278 lb/in3
    Melting point 1421℃ 2590℃

Mechanical properties of Tool Steel D2 | 1.2379 tool steel


  • The mechanical properties of D2 steels are tabulated below:
    Mechanical Properties Metric Imperial
    Hardness, Knoop (converted from Rockwell C hardness) 769 769
    Hardness, Rockwell C 62 62
    Hardness, Vickers 748 748
    Izod impact unnotched 77.0 J 56.8 ft-lb
    Poisson’s ratio 0.27-0.30 0.27-0.30
    Elastic modulus 190-210 GPa 27557-30457 ksi

D2| 1.2379 tool steel Heat treatment:

  • D2 steels should be preheated very slowly to 815ºC (1500ºF) and then temperature can be increased to 1010ºC (1850ºF). They are then held at 1010ºC (1850ºF) for 20 to 45 minutes and air cooled (air quenched).

Forged steel properties of tool D2 | 1.2379 tool steel

Forging of D2 steels can be done from 1065ºC (1950ºF) down to 954ºC (1750ºF). Do not forge below 926ºC (1700ºF).

Processing of Steel Material D2 | 1.2379 | X155CrMoV12-1

Otai Special provide the Grinding, milling , polishing, turning, drilling and others machining service as your required tolerances and size.

Packing of 1.2379 | X155CrMoV12-1 | D2 tool steel

By steel Wire Bundling then put in container,wooden box, or as customer require packing.

Welding performance

1.2419, DIN 105WCr6 Welding performance,Our production completely according to the 1.2419, DIN 105WCr6 standards to meet the 1.2419, DIN 105WCr6 Welding performance, can also according to the customer request, to meet the requirements of customers of 1.2419, DIN 105WCr6 Welding performance.

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