AFNOR X50CrMnNiNbN21-9

Grades | Stainless Steels | X50CrMnNiNbN21-9

AFNOR X50CrMnNiNbN21-9

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X50CrMnNiNbN21-9 Application:Valve steels and alloys for internal combustion engines

Chemical composition(mass fraction)(wt.%) of the X50CrMnNiNbN21-9
Elements Min.（≥） Max.（≤） Similar Remarks
C 0.45 0.55
Si - 0.45
Mn 8.00 10.00
P - 0.045
S - 0.030
Cr 20.00 22.00
Ni 3.50 5.50
Mo - -
N 0.40 0.60
W 0.80 1.50

Mechanical properties of grade X50CrMnNiNbN21-9

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition HBW
639 (≥) 627 (≥) 43 11 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 213

Physical properties of grade X50CrMnNiNbN21-9

Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm
726 (≥) 978 (≥) 41 42 31 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		 - - -
987 953 235 - - -

X50CrMnNiNbN21-9 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