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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)
455 (≥) 671 (≥) 42 22 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 413

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 - -     0.24 -  
857 853 - 24.3 322   -  
991 - 34 44.2   444 444

Heat Treatment of steel grade 20 CrMoNiV 4 7

Heat treated : 1192°C - 1894°C

Technological Curves of steel grade 20 CrMoNiV 4 7

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

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