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20 CrMoNiV 4 7

Germany SEW 20CrMoNiV47 Steels for larger forgings for components in turbine and generator installations and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20CrMoNiV47 / 20 CrMoNiV 4 7
Category Grade Standard Region/Area Standard Content
Metals 20 CrMoNiV 4 7 SEW 555 Germany Steels for larger forgings for components in turbine and generator installations

Chemical composition(mass fraction)(wt.%) of the 20 CrMoNiV 4 7

Element Min Max Similar

Mechanical Properties of steel grade 20 CrMoNiV 4 7

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)
148 (≥) 448 (≥) 14 32 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 111

Physical Properties of steel grade 20 CrMoNiV 4 7

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
24 - -     0.41 -  
857 519 - 42.3 431   -  
846 - 22 43.2   142 112

Heat Treatment of steel grade 20 CrMoNiV 4 7

Heat treated : 1936°C - 1154°C

Technological Curves of steel grade 20 CrMoNiV 4 7

Cross Reference Table (Equivalent Grade) of 20 CrMoNiV 4 7

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