D3 Tool Die Steels

D3 - Specification & Application

Cold-Work Tool Steel

Chemical composition(wt.%) of D3 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 2.00 2.35
Si 0.10 0.60
Mn 0.20 0.60
P - 0.030
S - 0.030
Cr 11.00 13.50
Mo - -
V - 1.00
W - 1.00
Ni+Cu - 0.75

D3 - Detail

Cold-Work Tool Steel

Mechanical properties of grade D3

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)
471 (≥) 345 (≥) 24 21 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 142

Physical properties of grade D3

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
292 (≥) 128 (≥) 23 22 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 114
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
767 351 722
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