A2 Tool Die Steels

A2 - Specification & Application

Cold-Work Tool Steel

Chemical composition(wt.%) of A2 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.95 1.05
Si 0.10 0.50
Mn 0.40 1.00
P - 0.030
S - 0.030
Cr 4.75 5.50
Mo 0.90 1.40
V 0.15 0.50
W - -
Ni+Cu - 0.75

A2 - Detail

Cold-Work Tool Steel

Mechanical properties of grade A2

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)
259 (≥) 419 (≥) 22 32 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 411

Physical properties of grade A2

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
736 (≥) 288 (≥) 13 13 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 212
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
337 446 394
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