8MnSi Tool Die Steels to GB/T 1299 (2000)

8MnSi - Specification & Application

  • GB/T 1299 (2000) - Alloy tool steels

Alloy tool steels

Chemical composition(wt.%) of 8MnSi grade: to GB/T 1299 (2000)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.75 0.85
Si 0.30 0.60
Mn 0.80 1.10
P - 0.030
S - 0.030
Cr - 0.025
Ni - 0.020
Cu - 0.30

8MnSi - Detail

Alloy tool steels of 8MnSi

Mechanical properties of grade 8MnSi GB/T 1299 (2000)

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)
665 (≥) 382 (≥) 32 42 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 443

Physical properties of grade 8MnSi GB/T 1299 (2000)

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
378 (≥) 481 (≥) 24 12 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 443
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
634 374 389

Equivalent Grade

Equivalent Products

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