4Cr10Si2Mo Stainless Steels to GB/T 1221 (1992)

4Cr10Si2Mo - Specification & Application

  • GB/T 1221 (1992) - Heat-resisting steel bars
  • GB/T 12773 (1991) - Valve steel bars for internal combustion engines - Technical requirements

Heat-resisting steel bars

Chemical composition(wt.%) of 4Cr10Si2Mo grade: to GB/T 1221 (1992)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.35 0.45
Si 1.90 2.60
Mn - 0.70
P - 0.035
S - 0.60
Cr 9.00 10.50
Mo 0.70 0.90

4Cr10Si2Mo - Detail

4Cr10Si2Mo

Mechanical properties of grade 4Cr10Si2Mo GB/T 1221 (1992)

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)
749 (≥) 362 (≥) 13 21 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 243

Physical properties of grade 4Cr10Si2Mo GB/T 1221 (1992)

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
677 (≥) 926 (≥) 41 41 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 333
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
854 569 395

Equivalent Grade

Equivalent Products

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