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ISO X33CrNiMnN23 3 Application:ISO standard valve austenite steel
Category Type Steel grade Standard Country
Grades Special Alloy ISO X33CrNiMnN23 3 ISO ISO

Chemical composition % of the ladle analysis of grade ISO X33CrNiMnN23 3

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Mo(%) W(%) N(%) Other(%)
0.28-0.38 0.50-1.00 1.50-3.50 Max 0.05 Max 0.03 22.0-24.0 7.00-9.00 Max 0.50 Max 0.50 0.25-0.35 C+N≥0.90,Nb+Ta 2.00-3.00
ISO standard valve austenite steel
Mechanical properties of grade ISO X33CrNiMnN23 3
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)
276 (≥) 695 (≥) 43 33 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 432
Physical properties of grade ISO X33CrNiMnN23 3
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
326 (≥) 114 (≥) 33 32 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 223
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
595 732 721
ISO X33CrNiMnN23 3 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
Cross Reference Table(Equivalent Grade)
Grade Standard Country Application
X33CrNiMnN23-3 ISO ISO
Heat-treatable steels, alloy steels and free-cutting steels -- Part 15: Valve steels for internal combustion engines

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