D7 Tool Die Steels

D7 - Specification & Application

Cold-Work Tool Steel

Chemical composition(wt.%) of D7 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 2.15 2.50
Si 0.10 0.60
Mn 0.10 0.60
P - 0.030
S - 0.030
Cr 11.50 13.50
Mo 0.70 1.20
V 3.80 4.40
W - -
Ni+Cu - 0.75

D7 - Detail

Cold-Work Tool Steel

Mechanical properties of grade D7

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)
832 (≥) 648 (≥) 11 11 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 142

Physical properties of grade D7

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
816 (≥) 356 (≥) 24 21 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 222
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
786 642 787

Equivalent Grade

We can customize the production of D7 grade, contact us for the best solution.
sales@specificsteel.com