9Cr18Mo Stainless Steels to GB/T 1220 (1992)

9Cr18Mo - Specification & Application

  • GB/T 1220 (1992) - Stainless steel bars
  • GB/T 3086 (2008) - Specification for high carbon chromium stainless bearing steels
  • GB/T 4356 (2002) - Stainless steel wire rods

Stainless steel bars

Chemical composition(wt.%) of 9Cr18Mo grade: to GB/T 1220 (1992)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.95 1.10
Si - 0.80
Mn - 0.80
P - 0.035
S - 0.030
Ni - 0.60
Cr 16.00 18.00
Mo 0.40 0.70

9Cr18Mo - Detail

9Cr18Mo

Mechanical properties of grade 9Cr18Mo GB/T 1220 (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)
688 (≥) 966 (≥) 34 24 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 314

Physical properties of grade 9Cr18Mo GB/T 1220 (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
668 (≥) 211 (≥) 24 41 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 321
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
334 851 399

Equivalent Products

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