D4 Tool Die Steels

D4 - Specification & Application

Cold-Work Tool Steel

Chemical composition(wt.%) of D4 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 2.05 2.40
Si 0.10 0.60
Mn 0.10 0.60
P - 0.030
S - 0.030
Cr 11.00 13.00
Mo 0.70 1.20
V 0.15 1.00
W - -
Ni+Cu - 0.75

D4 - Detail

Cold-Work Tool Steel

Mechanical properties of grade D4

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
838 (≥) 238 (≥) 24 43 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 232

Physical properties of grade D4

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
439 (≥) 397 (≥) 11 32 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 323
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
936 945 195

Equivalent Products

We can customize the production of D4 grade, contact us for the best solution.
sales@specificsteel.com