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ISO X21CrMoNiV12 2Application:High temperature bainite and martensite steel ISO standard internal combustion engine
CategoryTypeSteel gradeStandardCountry
Grades Special Alloy ISO X21CrMoNiV12 2ISOISO

Chemical composition%of the ladle analysis of gradeISO X21CrMoNiV12 2

C(%)Si(%)Mn(%)P(%)S(%)Cr(%)Ni(%)Mo(%)V(%)
0.17-0.25Max 0.50Max 1.00Max 0.035Max 0.0311.0-12.50.30-1.000.70-1.200.20-0.35
High temperature bainite and martensite steel ISO standard internal combustion engine
Mechanical properties of gradeISO X21CrMoNiV12 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 ConditionBrinell hardness(HBW)
822(≥)437(≥)442233Solution and Aging,Annealing,Ausaging,Q+T,etc233
Physical properties of gradeISO X21CrMoNiV12 2
PropertyDensity
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
958(≥)722(≥)223442Solution and Aging,Annealing,Ausaging,Q+T,etc211
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0)N/mm2
Creep rupture strength
(10000h)
(Rp1,0)N/mm2
711142947
ISO X21CrMoNiV12 2Range of products
Product typeProductsDimensionProcessesDeliver Status
Plates/SheetsPlates/Sheets0.08-200mm(T)*W*LForging,hot rolling and cold rollingAnnealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting
Steel BarRound Bar,Flat Bar,Square BarΦ8-1200mm*LForging,hot rolling and cold rolling,CastBlack,Rough Turning,Shot Blasting,
Coil/StripSteel Coil/Steel Strip0.03-16.0x1200mmCold-Rolled&Hot-RolledAnnealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting
Pipes/TubesSeamless Pipes/Tubes,Welded Pipes/TubesOD:6-219mm x WT:0.5-20.0mmHot extrusion,Cold Drawn,WeldedAnnealed,Solution and Aging,Q+T,ACID-WASHED
Cross Reference Table(Equivalent Grade)
GradeStandardCountryApplication
X21CrMoNiV12-2ISOISO
Wrought steels for use at elevated temperatures in engines

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