120W4 Tool Die Steels

120W4 - Specification & Application

Alloyed W steel

Chemical composition(wt.%) of 120W4 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 1.15 1.25
Si 0.15 0.30
Mn 0.20 0.35
P - 0.035
S - 0.035
Cr 0.15 0.25
Mo - -
V - -
W 0.90 1.10

120W4 - Detail

Alloyed W steel

Mechanical properties of grade 120W4

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)
975 (≥) 656 (≥) 32 31 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 232

Physical properties of grade 120W4

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
144 (≥) 244 (≥) 33 12 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 331
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
884 611 746

Equivalent Grade

Equivalent Products

We can customize the production of 120W4 grade, contact us for the best solution.
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