03X21H21M4ΓБ Stainless Steels

03X21H21M4ΓБ - Specification & Application

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

Chemical composition(wt.%) of 03X21H21M4ΓБ grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.03
Si - 0.60
Mn 1.80 2.50
P - 0.030
S - 0.020
Cr 20.00 22.00
Ni 20.00 22.00
Mo 3.40 3.70
W - 0.20
Ti - 0.20
Nb 15×C 0.80

03X21H21M4ΓБ - Detail

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

Mechanical properties of grade 03X21H21M4ΓБ

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)
792 (≥) 241 (≥) 14 41 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 323

Physical properties of grade 03X21H21M4ΓБ

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
966 (≥) 311 (≥) 24 24 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 233
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
698 836 531

Equivalent Grade

Equivalent Products

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