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51 CrMoV 4

Germany DIN 51CrMoV4 Hot rolled steels for springs suitable for quenching and tempering - Technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 51CrMoV4 / 51 CrMoV 4
Category Grade Standard Region/Area Standard Content
Metals 51 CrMoV 4 DIN 17221 Germany Hot rolled steels for springs suitable for quenching and tempering - Technical delivery conditions

Chemical composition(mass fraction)(wt.%) of the 51 CrMoV 4

Element Min Max Similar

Mechanical Properties of steel grade 51 CrMoV 4

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)
193 (≥) 718 (≥) 12 12 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 132

Physical Properties of steel grade 51 CrMoV 4

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 - -     0.24 -  
311 247 - 24.3 131   -  
612 - 33 11.2   414 223

Heat Treatment of steel grade 51 CrMoV 4

Heat treated : 1275°C - 1961°C

Technological Curves of steel grade 51 CrMoV 4

Cross Reference Table (Equivalent Grade) of 51 CrMoV 4

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