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X21CrMoNiV12-2

Description

International ISO ISO/TR 4956, X21CrMoNiV12-2 Specialsteel Wrought steels for use at elevated temperatures in engines and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: X21CrMoNiV12-2
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel X21CrMoNiV12-2 Bainite ISO International Wrought steels for use at elevated temperatures in engines

Chemical composition(mass fraction)(wt.%) of the X21CrMoNiV12-2

C Si Mn P S Cr Mo Ni V
0.17 -0.25 ≤0.50 ≤1.00 ≤0.035 ≤0.030 11.00 -12.50 0.70 -1.20 0.30 -1.00 0.20 -0.35

Mechanical Properties of steel grade X21CrMoNiV12-2

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
916 (≥) 542 (≥) 34 42 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 431

Physical Properties of steel grade X21CrMoNiV12-2

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
14 - -     0.41 -  
396 745 - 33.3 423   -  
713 - 31 44.2   331 423

Heat Treatment of steel grade X21CrMoNiV12-2

Heat treated : 1844°C - 1585°C

Technological Curves of steel grade X21CrMoNiV12-2

Relevant standard of X21CrMoNiV12-2

ISO/TR 4956 Wrought steels for use at elevated temperatures in engines ISO-TR-4956.pdf

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