1Cr12Mo Stainless Steels to GB/T 1221 (1992)

1Cr12Mo - Specification & Application

  • GB/T 1221 (1992) - Heat-resisting steel bars
  • GB/T 8732 (2004) - Steels of blade for steam turbine

Heat-resisting steel bars

Chemical composition(wt.%) of 1Cr12Mo grade: to GB/T 1221 (1992)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.10 0.15
Si - 0.50
Mn 0.30 0.50
P - 0.035
S - 0.300
Ni 0.30 0.60
Cr 11.50 13.00
Mo 0.30 0.60
Cu - 0.30

1Cr12Mo - Detail

1Cr12Mo

Mechanical properties of grade 1Cr12Mo 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)
397 (≥) 363 (≥) 24 14 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 421

Physical properties of grade 1Cr12Mo 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
335 (≥) 329 (≥) 24 23 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 431
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
412 362 315

Equivalent Grade

Equivalent Products

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