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55 CrNiMo 4

Germany DIN 55CrNiMo4 Alloyed CrNiMo Steel and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 55CrNiMo4 / 55 CrNiMo 4
Category Grade Standard Region/Area Standard Content
Metals 55 CrNiMo 4 -- Germany Alloyed CrNiMo Steel

Chemical composition(mass fraction)(wt.%) of the 55 CrNiMo 4

Element Min Max Similar

Mechanical Properties of steel grade 55 CrNiMo 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)
942 (≥) 574 (≥) 21 14 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 341

Physical Properties of steel grade 55 CrNiMo 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
23 - -     0.21 -  
515 426 - 33.3 244   -  
132 - 22 22.2   321 111

Heat Treatment of steel grade 55 CrNiMo 4

Heat treated : 1599°C - 1226°C

Technological Curves of steel grade 55 CrNiMo 4

Cross Reference Table (Equivalent Grade) of 55 CrNiMo 4

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