ISO X55CrMnNiN20-8

Grades | Stainless Steels | X55CrMnNiN20-8

ISO X55CrMnNiN20-8 ( Austenite )

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X55CrMnNiN20-8 Application:Heat-treatable steels, alloy steels and free-cutting steels -- Part 15: Valve steels for internal combustion engines

Chemical composition(mass fraction)(wt.%) of the X55CrMnNiN20-8
Elements Min.（≥） Max.（≤） Similar Remarks
C 0.50 0.60
Si - 0.25
Mn 7.00 10.00
P - 0.050
S - 0.030
Cr 19.50 21.50
Mo - -
Ni 1.50 2.75
N 0.20 0.40

Mechanical properties of grade X55CrMnNiN20-8

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition HBW
847 (≥) 246 (≥) 32 44 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 141

Physical properties of grade X55CrMnNiN20-8

Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm
852 (≥) 328 (≥) 11 12 12 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		 - - -
162 651 234 - - -

X55CrMnNiN20-8 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