A7 Tool Die Steels

A7 - Specification & Application

Cold-Work Tool Steel

Chemical composition(wt.%) of A7 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 2.00 2.85
Si 0.10 0.50
Mn 0.20 0.80
P - 0.030
S - 0.030
Cr 5.00 5.75
Mo 0.90 1.40
V 3.90 5.15
W 0.50 1.50
Ni+Cu - 0.75

A7 - Detail

Cold-Work Tool Steel

Mechanical properties of grade A7

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)
533 (≥) 269 (≥) 14 44 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 212

Physical properties of grade A7

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
281 (≥) 775 (≥) 23 31 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 322
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
732 936 132

Equivalent Products

We can customize the production of A7 grade, contact us for the best solution.
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