Grades | Stainless Steels | 55X20Γ9AH4

GOST 55X20Γ9AH4 ( Austenite )

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55X20Γ9AH4 Application:Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition

Chemical composition(mass fraction)(wt.%) of the 55X20Γ9AH4
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

Mechanical properties of grade 55X20Γ9AH4

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition HBW
533 (≥) 294 (≥) 14 43 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 423

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
124 (≥) 397 (≥) 31 43 22 Solution and Aging, Annealing, Ausaging, Q+T,etc
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
- - -
436 994 568 - - -

55X20Γ9AH4 Range of products
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