55X20Γ9AH4 Stainless Steels

55X20Γ9AH4 - Specification & Application

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

Chemical composition(wt.%) of 55X20Γ9AH4 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.50 0.60
Si - 0.45
Mn 8.00 10.00
P - 0.040
S - 0.030
Cr 20.00 22.00
Ni 3.50 4.50
Mo - 0.30
W - 0.20
Ti - 0.20
N 0.30 0.60

55X20Γ9AH4 - Detail

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

Mechanical properties of grade 55X20Γ9AH4

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)
217 (≥) 381 (≥) 34 34 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 244

Physical properties of grade 55X20Γ9AH4

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
266 (≥) 681 (≥) 32 21 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 414
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
141 121 458

Equivalent Grade

Equivalent Products

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