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AFNOR X33CrNiMnN23-8 Details

X33CrNiMnN23-8 Application:Valve steels and alloys for internal combustion engines

Category Type Grade Designations
Grades Stainless Steels X33CrNiMnN23-8 France - AFNOR , NF EN 10090 - Valve steels and alloys for internal combustion engines

Chemical composition(wt.%) of X33CrNiMnN23-8 grade: NF EN 10090

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.28 0.38
Si 0.50 1.50
Mn 1.50 3.50
P - 0.045
S - 0.030
Cr 22.00 24.00
Ni 7.00 9.00
Mo - 0.50
W - 0.50
N 0.25 0.35
Valve steels and alloys for internal combustion engines

Mechanical properties of grade X33CrNiMnN23-8 NF EN 10090

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)
791 (≥) 283 (≥) 33 13 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 313

Physical properties of grade X33CrNiMnN23-8 NF EN 10090

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
884 (≥) 125 (≥) 21 23 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 433
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
765 586 927

X33CrNiMnN23-8 - 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
X33CrNiMnN23-8 AFNOR France
Valve steels and alloys for internal combustion engines
1.4866 AFNOR France
Valve steels and alloys for internal combustion engines

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