9Cr18 Stainless Steels to GB/T 1220 (1992)

9Cr18 - Specification & Application

  • GB/T 1220 (1992) - Stainless steel bars
  • GB/T 3086 (2008) - Specification for high carbon chromium stainless bearing steels
  • GB/T 4240 (1993) - Stainless steel wires
  • GB/T 4356 (2002) - Stainless steel wire rods

Stainless steel bars

Chemical composition(wt.%) of 9Cr18 grade: to GB/T 1220 (1992)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.90 1.00
Si - 0.80
Mn - 0.80
P - 0.035
S - 0.030
Ni - 0.60
Cr 17.00 19.00
Mo - 0.75

9Cr18 - Detail

9Cr18

Mechanical properties of grade 9Cr18 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)
337 (≥) 497 (≥) 32 24 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 211

Physical properties of grade 9Cr18 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
544 (≥) 677 (≥) 21 12 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 134
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
741 621 991

Equivalent Products

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