12X18H9 Stainless Steels

12X18H9 - Specification & Application

Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition

Chemical composition(wt.%) of 12X18H9 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.12
Si - 0.80
Mn - 2.00
P - 0.035
S - 0.020
Cr 17.00 19.00
Ni 8.00 10.00
Mo - 0.30
W - 0.20
Ti - 0.50

12X18H9 - Detail

Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition

Mechanical properties of grade 12X18H9

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)
657 (≥) 523 (≥) 23 13 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 244

Physical properties of grade 12X18H9

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
725 (≥) 716 (≥) 13 21 12 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
745 972 642

Equivalent Products

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