55X20H4AΓ9M Stainless Steels

55X20H4AΓ9M - Specification & Application

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

Chemical composition(wt.%) of 55X20H4AΓ9M 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 - -
N 0.30 0.60

55X20H4AΓ9M - Detail

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

Mechanical properties of grade 55X20H4AΓ9M

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)
922 (≥) 576 (≥) 11 33 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 144

Physical properties of grade 55X20H4AΓ9M

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
455 (≥) 256 (≥) 21 44 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 442
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
982 145 946

Equivalent Grade

Equivalent Products

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