A9 Tool Die Steels

A9 - Specification & Application

Cold-Work Tool Steel

Chemical composition(wt.%) of A9 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.45 0.55
Si 0.95 1.15
Mn 0.20 0.50
P - 0.030
S - 0.030
Cr 4.75 5.50
Mo 1.30 1.80
V 0.80 1.40
W - -
Ni+Cu - 0.75
Ni 1.25 1.75

A9 - Detail

Cold-Work Tool Steel

Mechanical properties of grade A9

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)
482 (≥) 254 (≥) 21 44 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 131

Physical properties of grade A9

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
311 (≥) 722 (≥) 12 31 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 323
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
244 592 586

Equivalent Grade

We can customize the production of A9 grade, contact us for the best solution.
sales@specificsteel.com