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ISO X50CrSi8 2 Application:ISO standard valve martensite steel
Category Type Steel grade Standard Country
Grades Special Alloy ISO X50CrSi8 2 ISO ISO

Chemical composition % of the ladle analysis of grade ISO X50CrSi8 2

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%)
0.45-0.55 1.00-2.00 Max 0.60 Max 0.03 Max 0.03 7.50-9.50 Max 0.60
ISO standard valve martensite steel
Mechanical properties of grade ISO X50CrSi8 2
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)
438 (≥) 164 (≥) 44 24 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 114
Physical properties of grade ISO X50CrSi8 2
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
434 (≥) 994 (≥) 43 11 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 233
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
468 322 799
ISO X50CrSi8 2 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
X50CrSi8-2 ISO ISO
Heat-treatable steels, alloy steels and free-cutting steels -- Part 15: Valve steels for internal combustion engines

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