A3 Tool Die Steels

A3 - Specification & Application

Cold-Work Tool Steel

Chemical composition(wt.%) of A3 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 1.20 1.30
Si 0.10 0.50
Mn 0.40 0.60
P - 0.030
S - 0.030
Cr 4.75 5.50
Mo 0.90 1.40
V 0.80 1.40
W - -
Ni+Cu - 0.75

A3 - Detail

Cold-Work Tool Steel

Mechanical properties of grade A3

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)
776 (≥) 371 (≥) 34 44 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 134

Physical properties of grade A3

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
752 (≥) 542 (≥) 31 41 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 221
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
265 553 199

Equivalent Products

We can customize the production of A3 grade, contact us for the best solution.
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