P4 Tool Die Steels

P4 - Specification & Application

Mold Steel

Chemical composition(wt.%) of P4 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.12
Si 0.10 0.40
Mn 0.20 0.60
P - 0.030
S - 0.030
Cr 4.00 5.25
Mo 0.40 1.00
V - -
W - -
Ni+Cu - 0.75

P4 - Detail

Mold Steel

Mechanical properties of grade P4

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)
374 (≥) 295 (≥) 14 33 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 433

Physical properties of grade P4

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
777 (≥) 897 (≥) 43 13 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 243
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
157 857 246

Equivalent Products

We can customize the production of P4 grade, contact us for the best solution.
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