T3 Tool Die Steels

T3 - Specification & Application

High-Speed Tool Steel

Chemical composition(wt.%) of T3 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 1.08 1.13
Si 0.20 0.40
Mn 0.10 0.40
Cr 4.00 4.25
Mo 0.70 0.90
V 2.90 3.30
W 18.00 18.50

T3 - Detail

High-Speed Tool Steel

Mechanical properties of grade T3

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)
335 (≥) 982 (≥) 43 33 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 421

Physical properties of grade T3

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
514 (≥) 597 (≥) 13 12 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 113
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
224 722 418
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