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GOST 03X21H21M4ΓБ Details

03X21H21M4ΓБ Application:Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition

Category Type Grade Microstructure Designations
Grades Stainless Steels 03X21H21M4ΓБ Austenite Russia - GOST ,

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
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)
442 (≥) 653 (≥) 24 31 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 121

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
738 (≥) 651 (≥) 33 23 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 432
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
925 651 732

03X21H21M4ΓБ - Form of Supply

Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
03X21H21M4ΓБ GOST Russia
Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition

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